Merge remote-tracking branch 'upstream/main' into add-rom-patcher

.clang-format

@@ -0,0 +1,20 @@
+BasedOnStyle: LLVM
+
+AlignAfterOpenBracket: BlockIndent
+AlignEscapedNewlines: DontAlign
+AllowAllParametersOfDeclarationOnNextLine: false
+AllowShortCaseLabelsOnASingleLine: true
+AllowShortEnumsOnASingleLine: false
+AllowShortFunctionsOnASingleLine: InlineOnly
+AlwaysBreakBeforeMultilineStrings: true
+BinPackArguments: false
+BinPackParameters: false
+BreakBeforeBraces: Attach
+ColumnLimit: 120
+IndentWidth: 4
+SpaceBeforeParens: Custom
+SpaceBeforeParensOptions:
+  AfterControlStatements: true
+  AfterFunctionDeclarationName: true
+  AfterFunctionDefinitionName: true
+UseTab: Never

.devcontainer/devcontainer.json

@@ -6,7 +6,7 @@
     "mounts": [
         "source=n64flashcartmenu-bashhistory,target=/commandhistory,type=volume"
     ],
-    "postCreateCommand": "git submodule update --init && cd ./libdragon && ./build.sh",
+    "postCreateCommand": "git submodule update --init && cd ./libdragon && make clobber -j && make libdragon tools -j && make install tools-install -j",
     "customizations": {
         "vscode": {
             "extensions": [
@@ -24,4 +24,4 @@
             }
         }
     }
-}
+}

.github/workflows/build.yml

@@ -77,7 +77,7 @@ jobs:
       #   continue-on-error: true
 
       - name: Upload rolling release
-        uses: softprops/action-gh-release@v0.1.15
+        uses: softprops/action-gh-release@v2
         if: github.ref == 'refs/heads/main'
         with:
           name: Rolling release
@@ -105,7 +105,7 @@ jobs:
           doxyfile-path: './Doxyfile'
 
       - name: Deploy to GitHub Pages
-        uses: peaceiris/actions-gh-pages@v3
+        uses: peaceiris/actions-gh-pages@v4
         if: github.ref == 'refs/heads/main'
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}

.gitignore

@@ -1,9 +1,17 @@
+# Ignore editor specific config folders/files
 /.vscode
+
+# Ignore compilation result directories
 /build
-/filesystem
 /output
+
+# Ignore generated files in the libdragon FS
+/filesystem/FiraMonoBold.font64
+
+# Ignore external development tools
 /tools/*
 
-# There should never be ROMs uploaded, but just incase, make sure they are excluded.
+# Ignore any N64 ROM
 **/*.n64
+**/*.v64
 **/*.z64

.gitmodules

@@ -1,7 +1,7 @@
 [submodule "libdragon"]
 	path = libdragon
 	url = https://github.com/DragonMinded/libdragon
-	branch = unstable
+	branch = preview
 	ignore = dirty
 [submodule "src/libs/libspng"]
 	path = src/libs/libspng

Makefile

@@ -13,11 +13,17 @@ BUILD_TIMESTAMP = "$(shell TZ='UTC' date "+%Y-%m-%d %H:%M:%S %:z")"
 
 include $(N64_INST)/include/n64.mk
 
+N64_ROM_SAVETYPE = none
+N64_ROM_RTC = 1
+N64_ROM_REGIONFREE = 1
+N64_ROM_REGION = E
+
 N64_CFLAGS += -iquote $(SOURCE_DIR) -iquote $(ASSETS_DIR) -I $(SOURCE_DIR)/libs -flto=auto $(FLAGS)
 
 SRCS = \
 	main.c \
 	boot/boot.c \
+	boot/cheats.c \
 	boot/cic.c \
 	boot/reboot.S \
 	flashcart/64drive/64drive_ll.c \
@@ -83,7 +89,7 @@ FILESYSTEM = \
 
 $(MINIZ_OBJS): N64_CFLAGS+=-DMINIZ_NO_TIME -fcompare-debug-second
 $(SPNG_OBJS): N64_CFLAGS+=-isystem $(SOURCE_DIR)/libs/miniz -DSPNG_USE_MINIZ -fcompare-debug-second
-$(FILESYSTEM_DIR)/FiraMonoBold.font64: MKFONT_FLAGS+=-c 1 --size 16 -r 20-7F -r 2026-2026 --ellipsis 2026,1
+$(FILESYSTEM_DIR)/FiraMonoBold.font64: MKFONT_FLAGS+=-c 1 --size 16 -r 20-1FF -r 2026-2026 --ellipsis 2026,1
 
 $(@info $(shell mkdir -p ./$(FILESYSTEM_DIR) &> /dev/null))
 
@@ -130,9 +136,18 @@ all: $(OUTPUT_DIR)/$(PROJECT_NAME).n64 64drive ed64 ed64-clone sc64
 .PHONY: all
 
 clean:
-	@rm -rf ./$(BUILD_DIR) ./$(FILESYSTEM_DIR) ./$(OUTPUT_DIR)
+	@rm -f ./$(FILESYSTEM)
+	@find ./$(FILESYSTEM_DIR) -type d -empty -delete
+	@rm -rf ./$(BUILD_DIR) ./$(OUTPUT_DIR)
 .PHONY: clean
 
+format:
+	@find ./$(SOURCE_DIR) \
+		-path \./$(SOURCE_DIR)/libs -prune \
+		-o -iname *.c -print \
+		-o -iname *.h -print \
+		| xargs clang-format -i
+
 run: $(OUTPUT_DIR)/$(PROJECT_NAME).n64
 ifeq ($(OS),Windows_NT)
 	./localdeploy.bat

README.md

@@ -82,11 +82,8 @@ If required, you can manually adjust the file on the SD card using your computer
 - Download the latest `sc64menu.n64` file from the releases page, then put it in the root directory of your SD card.
 
 ##### 64DD disk support
-For the ability to load and run 64DD disk images, you need to add the folder `/menu/64ddipl` on the SD card.
+For the ability to load and run 64DD disk images, you need to place required 64DD IPL dumps in the `/menu/64ddipl` folder on the SD card.
-Download and add the relevant ipl files and rename them before adding them to the folder:
+For more details follow [this guide on the 64dd.org website](https://64dd.org/tutorial_sc64.html).
-- `NDDE0.n64` the US Prototype IPL can be downloaded from [here](https://64dd.org/dumps/64DD_IPL_US_MJR.n64)
-- `NDXJ0.n64` the JPN Development IPL can be downloaded from [here](https://64dd.org/dumps/64DD_IPL_DEV_H4G.n64)
-- `NDDJ2.n64` the JPN Retail IPL can be downloaded from [here](https://64dd.org/dumps/N64DD_IPLROM_(J).zip)
 
 Note: to load an expansion disk (e.g. F-Zero X) browse to the N64 ROM and load it (but not start it) and then browse to the DD expansion file and press the `R` button.
 
@@ -115,7 +112,6 @@ You can use a dev container in VSCode to ease development.
 Make sure that your firmware is compatible (currently v2.18.0+)
 See: [here](https://github.com/Polprzewodnikowy/SummerCart64/blob/v2.18.0/docs/00_quick_startup_guide.md#firmware-backupupdate)
 
-
 #### From the devcontainer
 It is not currently possible to directly communicate with USB devices.
 BUT, as a work around you can use a proxy TCP/IP connection
@@ -137,13 +133,18 @@ The ROM can be found in the `output` directory.
 
 NOTE: a "release" version of the SC64 menu is called `sc64menu.n64` and can be created for when you want to add it directly to the SDCard. This is generated by running `make all` or running `make sc64`.
 
+### Ares Emulator
+For ease of development and debugging, the menu ROM is able to run in the Ares emulator (without most flashcart features).
+
+* Ensure you have the Ares emulator on you computer.
+* Load the `N64FlashcartMenu.n64` ROM.
 
 ### Others
 * Add the required file to the correct folder on your SD card.
 
 
 # Update Libdragon submodule
-This repo currently uses the `unstable` branch as a submodule at a specific commit.
+This repo currently uses the `preview` branch as a submodule at a specific commit.
 To update to the latest version, use `git submodule update --remote ` from the terminal.
 
 # Generate documentation

libdragon

@@ -1 +1 @@
-Subproject commit 596490a9b650d52463b79c9356774bf3c65623f3
+Subproject commit af650428e9615f4e08d8e7eae187929a90c15ccc

src/boot/boot.c

@@ -2,7 +2,9 @@
 
 #include "boot_io.h"
 #include "boot.h"
+#include "cheats.h"
 #include "cic.h"
+#include "reboot.h"
 
 
 #define C0_STATUS_FR    (1 << 26)
@@ -10,10 +12,6 @@
 #define C0_STATUS_CU1   (1 << 29)
 
 
-extern uint32_t reboot_start __attribute__((section(".text")));
-extern size_t reboot_size __attribute__((section(".text")));
-
-
 static io32_t *boot_get_device_base (boot_params_t *params) {
     io32_t *device_base_address = ROM_CART;
     if (params->device_type == BOOT_DEVICE_TYPE_64DD) {
@@ -22,7 +20,7 @@ static io32_t *boot_get_device_base (boot_params_t *params) {
     return device_base_address;
 }
 
-static void boot_detect_cic_seed (boot_params_t *params) {
+static cic_type_t boot_detect_cic (boot_params_t *params) {
     io32_t *base = boot_get_device_base(params);
 
     uint8_t ipl3[IPL3_LENGTH] __attribute__((aligned(8)));
@@ -31,11 +29,17 @@ static void boot_detect_cic_seed (boot_params_t *params) {
     dma_read_raw_async(ipl3, (uint32_t) (&base[16]), sizeof(ipl3));
     dma_wait();
 
-    params->cic_seed = cic_get_seed(cic_detect(ipl3));
+    return cic_detect(ipl3);
 }
 
 
 void boot (boot_params_t *params) {
+    cic_type_t cic_type = boot_detect_cic(params);
+
+    if (params->detect_cic_seed) {
+        params->cic_seed = cic_get_seed(cic_type);
+    }
+
     if (params->tv_type == BOOT_TV_TYPE_PASSTHROUGH) {
         switch (get_tv_type()) {
             case TV_PAL:
@@ -53,10 +57,6 @@ void boot (boot_params_t *params) {
         }
     }
 
-    if (params->detect_cic_seed) {
-        boot_detect_cic_seed(params);
-    }
-
     C0_WRITE_STATUS(C0_STATUS_CU1 | C0_STATUS_CU0 | C0_STATUS_FR);
 
     while (!(cpu_io_read(&SP->SR) & SP_SR_HALT));
@@ -123,12 +123,16 @@ void boot (boot_params_t *params) {
         cpu_io_write(&ipl3_dst[i], io_read((uint32_t) (&ipl3_src[i])));
     }
 
+    bool cheats_installed = cheats_install(cic_type, params->cheat_list);
+
+    register uint32_t skip_rdram_reset asm ("a0");
     register uint32_t boot_device asm ("s3");
     register uint32_t tv_type asm ("s4");
     register uint32_t reset_type asm ("s5");
     register uint32_t cic_seed asm ("s6");
     register uint32_t version asm ("s7");
 
+    skip_rdram_reset = cheats_installed;
     boot_device = (params->device_type & 0x01);
     tv_type = (params->tv_type & 0x03);
     reset_type = BOOT_RESET_TYPE_COLD;
@@ -141,6 +145,7 @@ void boot (boot_params_t *params) {
     asm volatile (
         "la $t3, reboot \n"
         "jr $t3 \n" ::
+        [skip_rdram_reset] "r" (skip_rdram_reset),
         [boot_device] "r" (boot_device),
         [tv_type] "r" (tv_type),
         [reset_type] "r" (reset_type),

src/boot/boot.h

@@ -38,6 +38,7 @@ typedef struct {
     boot_tv_type_t tv_type;
     uint8_t cic_seed;
     bool detect_cic_seed;
+    uint32_t *cheat_list;
 } boot_params_t;
 
 

src/boot/cheats.c

@@ -0,0 +1,335 @@
+#include <libdragon.h>
+
+#include "boot_io.h"
+#include "cheats.h"
+#include "vr4300_asm.h"
+
+#define HIT_INVALIDATE_I ((4 << 2) | 0)
+#define HIT_WRITE_BACK_D ((6 << 2) | 1)
+
+#define D_CACHE_LINE_SIZE (16)
+
+#define CAUSE_IRQ_PRE_NMI (1 << 12)
+#define CAUSE_EXC_CODE_MASK (0x7C)
+#define CAUSE_EXC_CODE_WATCH (0x5C)
+
+#define WATCHLO_W (1 << 0)
+
+#define RELOCATED_EXCEPTION_HANDLER_ADDRESS (0x80000120)
+#define EXCEPTION_HANDLER_ADDRESS (0x80000180)
+#define PATCHER_ADDRESS (0x80700000)
+#define ENGINE_TEMPORARY_ADDRESS (PATCHER_ADDRESS + 0x10000)
+#define DEFAULT_ENGINE_ADDRESS (0x807C5C00)
+
+typedef struct {
+    uint8_t type;
+    uint32_t address;
+    uint16_t value;
+} cheat_t;
+
+typedef struct {
+    cheat_t main;
+    cheat_t sub;
+} cheat_entry_t;
+
+typedef enum {
+    SPECIAL_DISABLE_EXPANSION_PAK = 0xEE,
+    SPECIAL_WRITE_BYTE_ON_BOOT = 0xF0,
+    SPECIAL_WRITE_SHORT_ON_BOOT = 0xF1,
+    SPECIAL_SET_STORE_LOCATION = 0xFF,
+} cheat_type_special_t;
+
+#define IS_WIDTH_16(t) ((t) & (1 << 0))
+#define IS_CONDITION_NOT_EQUAL(t) ((t) & (1 << 1))
+#define IS_CONDITION_GS_BUTTON(t) ((t) & (1 << 3))
+
+#define IS_TYPE_REPEATER(t) ((t) == 0x50)
+#define IS_TYPE_WRITE(t) ((((t)&0xF0) == 0x80) || (((t)&0xF0) == 0xA0))
+#define IS_TYPE_CONDITIONAL(t) (((t)&0xF0) == 0xD0)
+
+#define IS_DOUBLE_ENTRY(t) (IS_TYPE_CONDITIONAL(t) || IS_TYPE_REPEATER(t))
+
+static bool cheats_patch_ipl3 (cic_type_t cic_type, io32_t *target) {
+    uint32_t patch_offset = 0;
+    uint32_t j_instruction = I_J((uint32_t)(target));
+
+    io32_t *ipl3 = SP_MEM->DMEM;
+
+    switch (cic_type) {
+    case CIC_5101: patch_offset = 476; break;
+    case CIC_6101:
+    case CIC_7102: patch_offset = 476; break;
+    case CIC_x102: patch_offset = 475; break;
+    case CIC_x103: patch_offset = 472; break;
+    case CIC_x105: patch_offset = 499; break;
+    case CIC_x106: patch_offset = 488; break;
+    default: return true;
+    }
+
+    // NOTE: Check for "jr $t1" instruction
+    //       Libdragon IPL3 could be brute-force signed with any retail
+    //       CIC seed and checksum, and we support only retail libultra IPL3
+    if (cpu_io_read(&ipl3[patch_offset]) != I_JR(REG_T1)) {
+        return false;
+    }
+
+    switch (cic_type) {
+    case CIC_x105:
+        // NOTE: This disables game code checksum verification
+        cpu_io_write(&ipl3[486], I_NOP());
+        break;
+
+    case CIC_x106:
+        // NOTE: CIC x106 IPL3 is partially scrambled
+        j_instruction ^= 0x8188764A;
+        break;
+
+    default: break;
+    }
+
+    cpu_io_write(&ipl3[patch_offset], j_instruction);
+
+    return false;
+}
+
+static bool cheats_get_next (uint32_t **cheat_list, cheat_entry_t *cheat) {
+    cheat_t *c = &cheat->main;
+    cheat->sub.type = 0;
+
+    for (int i = 0; i < 2; i++) {
+        uint32_t raw[2] = {(*cheat_list)[0], (*cheat_list)[1]};
+
+        (*cheat_list) += 2;
+
+        if ((raw[0] == 0) && (raw[1] == 0)) {
+            return false;
+        }
+
+        c->type = ((raw[0] >> 24) & 0xFF);
+        c->address = (raw[0] & 0xA07FFFFF);
+        c->value = (raw[1] & 0xFFFF);
+
+        if (!IS_DOUBLE_ENTRY(c->type)) {
+            break;
+        }
+
+        c = &cheat->sub;
+    }
+
+    return true;
+}
+
+static io32_t *cheats_get_engine_address (uint32_t *cheat_list) {
+    cheat_entry_t cheat;
+    while (cheats_get_next(&cheat_list, &cheat)) {
+        if (cheat.main.type == SPECIAL_SET_STORE_LOCATION) {
+            return (io32_t *)(cheat.main.address & 0x807FFFFF);
+        }
+    }
+    return (io32_t *)(DEFAULT_ENGINE_ADDRESS);
+}
+
+static void cheats_update_cache (volatile void *start, volatile void *end) {
+    data_cache_hit_writeback(start, (end - start));
+    inst_cache_hit_invalidate(start, (end - start));
+}
+
+bool cheats_install (cic_type_t cic_type, uint32_t *cheat_list) {
+    if (!cheat_list) {
+        return false;
+    }
+
+    io32_t *engine_start = (io32_t *)(ENGINE_TEMPORARY_ADDRESS);
+    io32_t *engine_p = engine_start;
+
+    io32_t *patcher_start = (io32_t *)(PATCHER_ADDRESS);
+    io32_t *patcher_p = patcher_start;
+
+    if (cheats_patch_ipl3(cic_type, patcher_start)) {
+        return false;
+    }
+
+    io32_t *final_engine_address = cheats_get_engine_address(cheat_list);
+
+    // Original watch exception handler code written by Jay Oster 'Parasyte'
+    // https://github.com/parasyte/alt64/blob/master/utils.c#L1024-L1054
+
+    uint32_t ori_placeholder_instruction = I_ORI(REG_ZERO, REG_K0, A_OFFSET(RELOCATED_EXCEPTION_HANDLER_ADDRESS));
+    uint32_t ori_placeholder_address = (uint32_t)(final_engine_address + 20);
+
+    // Load cause register
+    *engine_p++ = I_MFC0(REG_K0, C0_REG_CAUSE);
+
+    // Disable watch exception when reset button is pressed
+    *engine_p++ = I_ANDI(REG_K1, REG_K0, CAUSE_IRQ_PRE_NMI);
+    *engine_p++ = I_BNEL(REG_K1, REG_ZERO, 1);
+    *engine_p++ = I_MTC0(REG_ZERO, C0_REG_WATCH_LO);
+
+    // Check if watch exception ocurred, if yes then proceed to relocate the game exception handler
+    *engine_p++ = I_ANDI(REG_K0, REG_K0, CAUSE_EXC_CODE_MASK);
+    *engine_p++ = I_ORI(REG_K1, REG_ZERO, CAUSE_EXC_CODE_WATCH);
+    *engine_p++ = I_BNE(REG_K0, REG_K1, 15); // Skips to after the 'eret' instruction
+
+    // Extract base register number from the store instruction
+    *engine_p++ = I_MFC0(REG_K1, C0_REG_EPC);
+    *engine_p++ = I_LW(REG_K1, 0, REG_K1);
+    *engine_p++ = I_LUI(REG_K0, 0x03E0);
+    *engine_p++ = I_AND(REG_K1, REG_K0, REG_K1);
+    *engine_p++ = I_SRL(REG_K1, REG_K1, 5);
+
+    // Update create final instruction and update its target register number
+    *engine_p++ = I_LUI(REG_K0, ori_placeholder_instruction >> 16);
+    *engine_p++ = I_ORI(REG_K0, REG_K0, ori_placeholder_instruction);
+    *engine_p++ = I_OR(REG_K0, REG_K0, REG_K1);
+
+    // Write created instruction into placeholder
+    *engine_p++ = I_LUI(REG_K1, A_BASE(ori_placeholder_address));
+    *engine_p++ = I_SW(REG_K0, A_OFFSET(ori_placeholder_address), REG_K1);
+
+    // Force write and instruction cache invalidation
+    *engine_p++ = I_CACHE(HIT_WRITE_BACK_D, A_OFFSET(ori_placeholder_address), REG_K1);
+    *engine_p++ = I_CACHE(HIT_INVALIDATE_I, A_OFFSET(ori_placeholder_address), REG_K1);
+
+    // Load address base and execute created instruction
+    *engine_p++ = I_LUI(REG_K0, A_BASE(RELOCATED_EXCEPTION_HANDLER_ADDRESS));
+    *engine_p++ = I_NOP();
+
+    // Return from the exception
+    *engine_p++ = I_ERET();
+
+    cheat_entry_t cheat;
+
+    while (cheats_get_next(&cheat_list, &cheat)) {
+        cheat_t *c = &cheat.main;
+
+        if (IS_TYPE_REPEATER(c->type)) {
+            if ((!IS_TYPE_WRITE(cheat.sub.type)) || IS_CONDITION_GS_BUTTON(cheat.sub.type)) {
+                continue;
+            }
+
+            int count = ((c->address >> 8) & 0xFF);
+            int step = (c->address & 0xFF);
+            int16_t increment = (int16_t)(c->value);
+
+            c = &cheat.sub;
+
+            for (int i = 0; i < count; i++) {
+                *engine_p++ = I_LUI(REG_K0, A_BASE(c->address));
+                *engine_p++ = I_ORI(REG_K1, REG_ZERO, c->value);
+                *engine_p++ = IS_WIDTH_16(c->type) ? I_SH(REG_K1, A_OFFSET(c->address), REG_K0)
+                                                   : I_SB(REG_K1, A_OFFSET(c->address), REG_K0);
+
+                c->address += step;
+                c->value += increment;
+            }
+
+            continue;
+        }
+
+        if (IS_TYPE_CONDITIONAL(c->type)) {
+            if ((!IS_TYPE_WRITE(cheat.sub.type)) || IS_CONDITION_GS_BUTTON(cheat.sub.type)) {
+                continue;
+            }
+
+            *engine_p++ = I_LUI(REG_K0, A_BASE(c->address));
+            *engine_p++ = IS_WIDTH_16(c->type) ? I_LHU(REG_K0, A_OFFSET(c->address), REG_K0)
+                                               : I_LBU(REG_K0, A_OFFSET(c->address), REG_K0);
+            *engine_p++ = I_ORI(REG_K1, REG_ZERO, c->value & (IS_WIDTH_16(c->type) ? 0xFFFF : 0xFF));
+            *engine_p++ = IS_CONDITION_NOT_EQUAL(c->type) ? I_BEQ(REG_K0, REG_K1, 3) : I_BNE(REG_K0, REG_K1, 3);
+
+            c = &cheat.sub;
+        }
+
+        if (IS_TYPE_WRITE(c->type)) {
+            if (IS_CONDITION_GS_BUTTON(c->type)) {
+                continue;
+            }
+
+            *engine_p++ = I_LUI(REG_K0, A_BASE(c->address));
+            *engine_p++ = I_ORI(REG_K1, REG_ZERO, c->value);
+            *engine_p++ = IS_WIDTH_16(c->type) ? I_SH(REG_K1, A_OFFSET(c->address), REG_K0)
+                                               : I_SB(REG_K1, A_OFFSET(c->address), REG_K0);
+
+            continue;
+        }
+
+        switch (c->type) {
+        case SPECIAL_WRITE_BYTE_ON_BOOT:
+        case SPECIAL_WRITE_SHORT_ON_BOOT: {
+            *patcher_p++ = I_LUI(REG_K0, A_BASE(c->address));
+            *patcher_p++ = I_ORI(REG_K1, REG_ZERO, c->value);
+            *patcher_p++ = IS_WIDTH_16(c->type) ? I_SH(REG_K1, A_OFFSET(c->address), REG_K0)
+                                                : I_SB(REG_K1, A_OFFSET(c->address), REG_K0);
+            break;
+        }
+        case SPECIAL_DISABLE_EXPANSION_PAK: {
+            *patcher_p++ = I_LUI(REG_K0, 0xA000);
+            *patcher_p++ = I_LUI(REG_K1, 0x0040);
+            *patcher_p++ = I_SW(REG_K1, 0x318, REG_K0);
+            *patcher_p++ = I_SW(REG_K1, 0x3F0, REG_K0);
+            break;
+        }
+        default: break;
+        }
+    }
+
+    *engine_p++ = I_J(RELOCATED_EXCEPTION_HANDLER_ADDRESS);
+    *engine_p++ = I_NOP();
+
+    uint32_t j_engine_from_handler = I_J((uint32_t)(final_engine_address));
+
+    // Copy engine to the final location
+    *patcher_p++ = I_LUI(REG_T3, A_BASE((uint32_t)(engine_start)));
+    *patcher_p++ = I_ADDIU(REG_T3, REG_T3, A_OFFSET((uint32_t)(engine_start)));
+
+    *patcher_p++ = I_LUI(REG_T4, A_BASE((uint32_t)(engine_p)));
+    *patcher_p++ = I_ADDIU(REG_T4, REG_T4, A_OFFSET((uint32_t)(engine_p)));
+
+    *patcher_p++ = I_LUI(REG_T5, A_BASE((uint32_t)(final_engine_address)));
+    *patcher_p++ = I_ADDIU(REG_T5, REG_T5, A_OFFSET((uint32_t)(final_engine_address)));
+
+    *patcher_p++ = I_ORI(REG_T6, REG_ZERO, 0);
+
+    *patcher_p++ = I_LW(REG_K1, 0, REG_T3);
+    *patcher_p++ = I_SW(REG_K1, 0, REG_T5);
+    *patcher_p++ = I_ADDIU(REG_T3, REG_T3, 4);
+    *patcher_p++ = I_ADDIU(REG_T5, REG_T5, 4);
+    *patcher_p++ = I_BNE(REG_T3, REG_T4, -5);
+    *patcher_p++ = I_ADDIU(REG_T6, REG_T6, 4);
+
+    // Force write and invalidate instruction cache
+    *patcher_p++ = I_LUI(REG_T5, A_BASE((uint32_t)(final_engine_address)));
+    *patcher_p++ = I_ADDIU(REG_T5, REG_T5, A_OFFSET((uint32_t)(final_engine_address)));
+
+    *patcher_p++ = I_CACHE(HIT_WRITE_BACK_D, 0, REG_T5);
+    *patcher_p++ = I_CACHE(HIT_INVALIDATE_I, 0, REG_T5);
+    *patcher_p++ = I_ADDIU(REG_T6, REG_T6, -D_CACHE_LINE_SIZE);
+    *patcher_p++ = I_BGTZ(REG_T6, -4);
+    *patcher_p++ = I_ADDIU(REG_T5, REG_T5, D_CACHE_LINE_SIZE);
+
+    // Write jump instruction to the exception handler
+    *patcher_p++ = I_LUI(REG_K0, A_BASE(EXCEPTION_HANDLER_ADDRESS));
+    *patcher_p++ = I_ADDIU(REG_K0, REG_K0, A_OFFSET(EXCEPTION_HANDLER_ADDRESS));
+
+    *patcher_p++ = I_LUI(REG_K1, j_engine_from_handler >> 16);
+    *patcher_p++ = I_ORI(REG_K1, REG_K1, j_engine_from_handler);
+    *patcher_p++ = I_SW(REG_K1, 0, REG_K0);
+    *patcher_p++ = I_SW(REG_ZERO, 4, REG_K0);
+
+    *patcher_p++ = I_CACHE(HIT_WRITE_BACK_D, 0, REG_K0);
+    *patcher_p++ = I_CACHE(HIT_INVALIDATE_I, 0, REG_K0);
+
+    // Set watch exception on address 0x80000180
+    *patcher_p++ = I_ORI(REG_K1, REG_ZERO, EXCEPTION_HANDLER_ADDRESS | WATCHLO_W);
+    *patcher_p++ = I_MTC0(REG_K1, C0_REG_WATCH_LO);
+    *patcher_p++ = I_MTC0(REG_ZERO, C0_REG_WATCH_HI);
+
+    // Jump back to the game code
+    *patcher_p++ = I_JR(REG_T1);
+    *patcher_p++ = I_NOP();
+
+    cheats_update_cache(engine_start, engine_p);
+    cheats_update_cache(patcher_start, patcher_p);
+
+    return true;
+}

src/boot/cheats.h

@@ -0,0 +1,10 @@
+#ifndef CHEATS_H__
+#define CHEATS_H__
+
+#include <stdint.h>
+
+#include "cic.h"
+
+bool cheats_install (cic_type_t cic_type, uint32_t *cheat_list);
+
+#endif

src/boot/reboot.S

@@ -1,3 +1,6 @@
+#include "reboot.h"
+
+
 #define IPL3_ENTRY          0xA4000040
 #define REBOOT_ADDRESS      0xA4001000
 #define STACK_ADDRESS       0xA4001FF0
@@ -34,9 +37,10 @@ reboot_entry:
 
     li $sp, STACK_ADDRESS
 
-reset_rdram:
+    bnez $a0, reset_rdram_skip  # Skip when cheats are enabled
-    bnez $s5, reset_rdram_skip
+    bnez $s5, reset_rdram_skip  # Skip when reset type is set to NMI
 
+reset_rdram:
     li $t0, RI_ADDRESS
 
     sw $zero, RI_REFRESH($t0)

src/boot/reboot.h

@@ -0,0 +1,17 @@
+#ifndef REBOOT_H__
+#define REBOOT_H__
+
+
+#ifndef __ASSEMBLER__
+
+#include <stdint.h>
+#include <stddef.h>
+
+
+extern uint32_t reboot_start __attribute__((section(".text")));
+extern size_t reboot_size __attribute__((section(".text")));
+
+#endif
+
+
+#endif

src/boot/vr4300_asm.h

@@ -0,0 +1,397 @@
+#ifndef VR4300_ASM_H__
+#define VR4300_ASM_H__
+
+#include <stdint.h>
+
+typedef union {
+    uint32_t raw;
+
+    struct {
+        uint32_t op : 6;
+        uint32_t rs : 5;
+        uint32_t rt : 5;
+        uint32_t imm : 16;
+    } i_type;
+
+    struct {
+        uint32_t op : 6;
+        uint32_t target : 26;
+    } j_type;
+
+    struct {
+        uint32_t op : 6;
+        uint32_t rs : 5;
+        uint32_t rt : 5;
+        uint32_t rd : 5;
+        uint32_t sa : 5;
+        uint32_t funct : 6;
+    } r_type;
+
+    struct {
+        uint32_t op : 6;
+        uint32_t co : 1;
+        uint32_t funct : 25;
+    } c_type;
+} vr4300_instruction_t;
+
+typedef enum {
+    OP_SPECIAL,
+    OP_REGIMM,
+    OP_J,
+    OP_JAL,
+    OP_BEQ,
+    OP_BNE,
+    OP_BLEZ,
+    OP_BGTZ,
+    OP_ADDI,
+    OP_ADDIU,
+    OP_SLTI,
+    OP_SLTIU,
+    OP_ANDI,
+    OP_ORI,
+    OP_XORI,
+    OP_LUI,
+    OP_COP0,
+    OP_COP1,
+    OP_COP2,
+    __OP_RESERVED_19,
+    OP_BEQL,
+    OP_BNEL,
+    OP_BLEZL,
+    OP_BGTZL,
+    OP_DADDI,
+    OP_DADDIU,
+    OP_LDL,
+    OP_LDR,
+    __OP_RESERVED_28,
+    __OP_RESERVED_29,
+    __OP_RESERVED_30,
+    __OP_RESERVED_31,
+    OP_LB,
+    OP_LH,
+    OP_LWL,
+    OP_LW,
+    OP_LBU,
+    OP_LHU,
+    OP_LWR,
+    OP_LWU,
+    OP_SB,
+    OP_SH,
+    OP_SWL,
+    OP_SW,
+    OP_SDL,
+    OP_SDR,
+    OP_SWR,
+    OP_CACHE,
+    OP_LL,
+    OP_LWC1,
+    OP_LWC2,
+    __OP_RESERVED_51,
+    OP_LLD,
+    OP_LDC1,
+    OP_LDC2,
+    OP_LD,
+    OP_SC,
+    OP_SWC1,
+    OP_SWC2,
+    __OP_RESERVED_59,
+    OP_SCD,
+    OP_SDC1,
+    OP_SDC2,
+    OP_SD,
+} vr4300_op_t;
+
+typedef enum {
+    FUNCT_SSL,
+    __FUNCT_RESERVED_1,
+    FUNCT_SRL,
+    FUNCT_SRA,
+    FUNCT_SLLV,
+    __FUNCT_RESERVED_5,
+    FUNCT_SRLV,
+    FUNCT_SRAV,
+    FUNCT_JR,
+    FUNCT_JALR,
+    __FUNCT_RESERVED_10,
+    __FUNCT_RESERVED_11,
+    FUNCT_SYSCALL,
+    FUNCT_BREAK,
+    __FUNCT_RESERVED_14,
+    FUNCT_SYNC,
+    FUNCT_MFHI,
+    FUNCT_MTHI,
+    FUNCT_MFLO,
+    FUNCT_MTLO,
+    FUNCT_DSLLV,
+    __FUNCT_RESERVED_21,
+    FUNCT_DSRLV,
+    FUNCT_DSRAV,
+    FUNCT_MULT,
+    FUNCT_MULTU,
+    FUNCT_DIV,
+    FUNCT_DIVU,
+    FUNCT_DMULT,
+    FUNCT_DMULTU,
+    FUNCT_DDIV,
+    FUNCT_DDIVU,
+    FUNCT_ADD,
+    FUNCT_ADDU,
+    FUNCT_SUB,
+    FUNCT_SUBU,
+    FUNCT_AND,
+    FUNCT_OR,
+    FUNCT_XOR,
+    FUNCT_NOR,
+    __FUNCT_RESERVED_40,
+    __FUNCT_RESERVED_41,
+    FUNCT_SLT,
+    FUNCT_SLTU,
+    FUNCT_DADD,
+    FUNCT_DADDU,
+    FUNCT_DSUB,
+    FUNCT_DSUBU,
+    FUNCT_TGE,
+    FUNCT_TGEU,
+    FUNCT_TLT,
+    FUNCT_TLTU,
+    FUNCT_TEQ,
+    __FUNCT_RESERVED_53,
+    FUNCT_TNE,
+    __FUNCT_RESERVED_55,
+    FUNCT_DSLL,
+    __FUNCT_RESERVED_57,
+    FUNCT_DSRL,
+    FUNCT_DSRA,
+    FUNCT_DSLL32,
+    __FUNCT_RESERVED_61,
+    FUNCT_DSRL32,
+    FUNCT_DSRA32,
+} vr4300_funct_t;
+
+typedef enum {
+    REGIMM_BLTZ,
+    REGIMM_BGEZ,
+    REGIMM_BLTZL,
+    REGIMM_BGEZL,
+    __REGIMM_RESERVED_4,
+    __REGIMM_RESERVED_5,
+    __REGIMM_RESERVED_6,
+    __REGIMM_RESERVED_7,
+    REGIMM_TGEI,
+    REGIMM_TGEIU,
+    REGIMM_TLTI,
+    REGIMM_TLTIU,
+    REGIMM_TEQI,
+    __REGIMM_RESERVED_13,
+    REGIMM_TNEI,
+    __REGIMM_RESERVED_15,
+    REGIMM_BLTZAL,
+    REGIMM_BGEZAL,
+    REGIMM_BLTZALL,
+    REGIMM_BGEZALL,
+    __REGIMM_RESERVED_20,
+    __REGIMM_RESERVED_21,
+    __REGIMM_RESERVED_22,
+    __REGIMM_RESERVED_23,
+    __REGIMM_RESERVED_24,
+    __REGIMM_RESERVED_25,
+    __REGIMM_RESERVED_26,
+    __REGIMM_RESERVED_27,
+    __REGIMM_RESERVED_28,
+    __REGIMM_RESERVED_29,
+    __REGIMM_RESERVED_30,
+    __REGIMM_RESERVED_31,
+} vr4300_regimm_t;
+
+typedef enum {
+    REG_ZERO,
+    REG_AT,
+    REG_V0,
+    REG_V1,
+    REG_A0,
+    REG_A1,
+    REG_A2,
+    REG_A3,
+    REG_T0,
+    REG_T1,
+    REG_T2,
+    REG_T3,
+    REG_T4,
+    REG_T5,
+    REG_T6,
+    REG_T7,
+    REG_S0,
+    REG_S1,
+    REG_S2,
+    REG_S3,
+    REG_S4,
+    REG_S5,
+    REG_S6,
+    REG_S7,
+    REG_T8,
+    REG_T9,
+    REG_K0,
+    REG_K1,
+    REG_GP,
+    REG_SP,
+    REG_FP,
+    REG_RA,
+} vr4300_reg_t;
+
+typedef enum {
+    C0_REG_INDEX,
+    C0_REG_RANDOM,
+    C0_REG_ENTRY_LO_0,
+    C0_REG_ENTRY_LO_1,
+    C0_REG_CONTEXT,
+    C0_REG_PAGE_MASK,
+    C0_REG_WIRED,
+    __C0_REG_RESERVED_7,
+    C0_REG_BAD_V_ADDR,
+    C0_REG_COUNT,
+    C0_REG_ENTRY_HI,
+    C0_REG_COMPARE,
+    C0_REG_STATUS,
+    C0_REG_CAUSE,
+    C0_REG_EPC,
+    C0_REG_PR_ID,
+    C0_REG_CONFIG,
+    C0_REG_LL_ADDR,
+    C0_REG_WATCH_LO,
+    C0_REG_WATCH_HI,
+    C0_REG_X_CONTEXT,
+    __C0_REG_RESERVED_21,
+    __C0_REG_RESERVED_22,
+    __C0_REG_RESERVED_23,
+    __C0_REG_RESERVED_24,
+    __C0_REG_RESERVED_25,
+    C0_REG_PARITY_ERROR,
+    C0_REG_CACHE_ERROR,
+    C0_REG_TAG_LO,
+    C0_REG_TAG_HI,
+    C0_REG_ERROR_EPC,
+    __C0_REG_RESERVED_31,
+} vr4300_c0_reg_t;
+
+typedef enum {
+    COPZ_RS_MF,
+    COPZ_RS_DMF,
+    COPZ_RS_CF,
+    __COPZ_RS_RESERVED_3,
+    COPZ_RS_MT,
+    COPZ_RS_DMT,
+    COPZ_RS_CT,
+    __COPZ_RS_RESERVED_7,
+    COPZ_RS_BC,
+    __COPZ_RS_RESERVED_9,
+    __COPZ_RS_RESERVED_10,
+    __COPZ_RS_RESERVED_11,
+    __COPZ_RS_RESERVED_12,
+    __COPZ_RS_RESERVED_13,
+    __COPZ_RS_RESERVED_14,
+    __COPZ_RS_RESERVED_15,
+} vr4300_copz_rs_t;
+
+typedef enum {
+    __C0_FUNCT_RESERVED_0,
+    C0_FUNCT_TLBR,
+    C0_FUNCT_TLBWI,
+    __C0_FUNCT_RESERVED_3,
+    __C0_FUNCT_RESERVED_4,
+    __C0_FUNCT_RESERVED_5,
+    C0_FUNCT_TLBWR,
+    __C0_FUNCT_RESERVED_7,
+    C0_FUNCT_TLBP,
+    __C0_FUNCT_RESERVED_9,
+    __C0_FUNCT_RESERVED_10,
+    __C0_FUNCT_RESERVED_11,
+    __C0_FUNCT_RESERVED_12,
+    __C0_FUNCT_RESERVED_13,
+    __C0_FUNCT_RESERVED_14,
+    __C0_FUNCT_RESERVED_15,
+    __C0_FUNCT_RESERVED_16,
+    __C0_FUNCT_RESERVED_17,
+    __C0_FUNCT_RESERVED_18,
+    __C0_FUNCT_RESERVED_19,
+    __C0_FUNCT_RESERVED_20,
+    __C0_FUNCT_RESERVED_21,
+    __C0_FUNCT_RESERVED_22,
+    __C0_FUNCT_RESERVED_23,
+    C0_FUNCT_ERET,
+    __C0_FUNCT_RESERVED_25,
+    __C0_FUNCT_RESERVED_26,
+    __C0_FUNCT_RESERVED_27,
+    __C0_FUNCT_RESERVED_28,
+    __C0_FUNCT_RESERVED_29,
+    __C0_FUNCT_RESERVED_30,
+    __C0_FUNCT_RESERVED_31,
+    __C0_FUNCT_RESERVED_32,
+    __C0_FUNCT_RESERVED_33,
+    __C0_FUNCT_RESERVED_34,
+    __C0_FUNCT_RESERVED_35,
+    __C0_FUNCT_RESERVED_36,
+    __C0_FUNCT_RESERVED_37,
+    __C0_FUNCT_RESERVED_38,
+    __C0_FUNCT_RESERVED_39,
+    __C0_FUNCT_RESERVED_40,
+    __C0_FUNCT_RESERVED_41,
+    __C0_FUNCT_RESERVED_42,
+    __C0_FUNCT_RESERVED_43,
+    __C0_FUNCT_RESERVED_44,
+    __C0_FUNCT_RESERVED_45,
+    __C0_FUNCT_RESERVED_46,
+    __C0_FUNCT_RESERVED_47,
+    __C0_FUNCT_RESERVED_48,
+    __C0_FUNCT_RESERVED_49,
+    __C0_FUNCT_RESERVED_50,
+    __C0_FUNCT_RESERVED_51,
+    __C0_FUNCT_RESERVED_52,
+    __C0_FUNCT_RESERVED_53,
+    __C0_FUNCT_RESERVED_54,
+    __C0_FUNCT_RESERVED_55,
+    __C0_FUNCT_RESERVED_56,
+    __C0_FUNCT_RESERVED_57,
+    __C0_FUNCT_RESERVED_58,
+    __C0_FUNCT_RESERVED_59,
+    __C0_FUNCT_RESERVED_60,
+    __C0_FUNCT_RESERVED_61,
+    __C0_FUNCT_RESERVED_62,
+    __C0_FUNCT_RESERVED_63,
+} vr4300_c0_funct;
+
+#define __ASM_I_INST(o, s, t, i) \
+    (((vr4300_instruction_t){.i_type = {.op = (o), .rs = (s), .rt = (t), .imm = (i)&0xFFFF}}).raw)
+#define __ASM_J_INST(o, t) (((vr4300_instruction_t){.j_type = {.op = (o), .target = (t)&0x3FFFFFF}}).raw)
+#define __ASM_R_INST(o, s, t, d, a, f) \
+    (((vr4300_instruction_t){.r_type = {.op = (o), .rs = (s), .rt = (t), .rd = (d), .sa = (a), .funct = (f)}}).raw)
+#define __ASM_C_INST(o, c, f) (((vr4300_instruction_t){.c_type = {.op = (o), .co = (c), .funct = (f)}}).raw)
+
+#define A_OFFSET(a) ((int16_t)((a)&0xFFFF))
+#define A_BASE(a) ((uint16_t)((((a) >> 16) & 0xFFFF) + (A_OFFSET(a) < 0 ? 1 : 0)))
+
+#define I_ADDIU(rt, rs, immediate) __ASM_I_INST(OP_ADDIU, rs, rt, immediate)
+#define I_AND(rd, rs, rt) __ASM_R_INST(OP_SPECIAL, rs, rt, rd, 0, FUNCT_AND)
+#define I_ANDI(rt, rs, immediate) __ASM_I_INST(OP_ANDI, rs, rt, immediate)
+#define I_BEQ(rs, rt, offset) __ASM_I_INST(OP_BEQ, rs, rt, offset)
+#define I_BGTZ(rs, offset) __ASM_I_INST(OP_BGTZ, rs, 0, offset)
+#define I_BNE(rs, rt, offset) __ASM_I_INST(OP_BNE, rs, rt, offset)
+#define I_BNEL(rs, rt, offset) __ASM_I_INST(OP_BNEL, rs, rt, offset)
+#define I_CACHE(op, offset, base) __ASM_I_INST(OP_CACHE, base, op, offset)
+#define I_ERET() __ASM_C_INST(OP_COP0, 1, C0_FUNCT_ERET)
+#define I_J(target) __ASM_J_INST(OP_J, (target >> 2))
+#define I_JR(rs) __ASM_R_INST(OP_SPECIAL, rs, REG_ZERO, REG_ZERO, 0, FUNCT_JR)
+#define I_LBU(rt, offset, base) __ASM_I_INST(OP_LBU, base, rt, offset)
+#define I_LHU(rt, offset, base) __ASM_I_INST(OP_LHU, base, rt, offset)
+#define I_LUI(rt, immediate) __ASM_I_INST(OP_LUI, 0, rt, immediate)
+#define I_LW(rt, offset, base) __ASM_I_INST(OP_LW, base, rt, offset)
+#define I_MFC0(rt, rd) __ASM_R_INST(OP_COP0, COPZ_RS_MF, rt, rd, 0, 0)
+#define I_MTC0(rt, rd) __ASM_R_INST(OP_COP0, COPZ_RS_MT, rt, rd, 0, 0)
+#define I_NOP() __ASM_R_INST(OP_SPECIAL, REG_ZERO, REG_ZERO, REG_ZERO, 0, FUNCT_SSL)
+#define I_OR(rd, rs, rt) __ASM_R_INST(OP_SPECIAL, rs, rt, rd, 0, FUNCT_OR)
+#define I_ORI(rt, rs, immediate) __ASM_I_INST(OP_ORI, rs, rt, immediate)
+#define I_SB(rt, offset, base) __ASM_I_INST(OP_SB, base, rt, offset)
+#define I_SH(rt, offset, base) __ASM_I_INST(OP_SH, base, rt, offset)
+#define I_SRL(rd, rt, sa) __ASM_R_INST(OP_SPECIAL, 0, rt, rd, sa, FUNCT_SRL)
+#define I_SW(rt, offset, base) __ASM_I_INST(OP_SW, base, rt, offset)
+
+#endif

src/flashcart/64drive/64drive.c

@@ -83,11 +83,11 @@ static flashcart_err_t d64_load_rom (char *rom_path, flashcart_progress_callback
     FIL fil;
     UINT br;
 
-    if (f_open(&fil, strip_sd_prefix(rom_path), FA_READ) != FR_OK) {
+    if (f_open(&fil, strip_fs_prefix(rom_path), FA_READ) != FR_OK) {
         return FLASHCART_ERR_LOAD;
     }
 
-    fix_file_size(&fil);
+    fatfs_fix_file_size(&fil);
 
     size_t rom_size = f_size(&fil);
 
@@ -125,11 +125,11 @@ static flashcart_err_t d64_load_file (char *file_path, uint32_t rom_offset, uint
     FIL fil;
     UINT br;
 
-    if (f_open(&fil, strip_sd_prefix(file_path), FA_READ) != FR_OK) {
+    if (f_open(&fil, strip_fs_prefix(file_path), FA_READ) != FR_OK) {
         return FLASHCART_ERR_LOAD;
     }
 
-    fix_file_size(&fil);
+    fatfs_fix_file_size(&fil);
 
     size_t file_size = f_size(&fil) - file_offset;
 
@@ -164,7 +164,7 @@ static flashcart_err_t d64_load_save (char *save_path) {
     FIL fil;
     UINT br;
 
-    if (f_open(&fil, strip_sd_prefix(save_path), FA_READ) != FR_OK) {
+    if (f_open(&fil, strip_fs_prefix(save_path), FA_READ) != FR_OK) {
         return FLASHCART_ERR_LOAD;
     }
 
@@ -251,7 +251,13 @@ static flashcart_err_t d64_set_save_type (flashcart_save_type_t save_type) {
     return FLASHCART_OK;
 }
 
-static flashcart_err_t d64_set_save_writeback (uint32_t *sectors) {
+static flashcart_err_t d64_set_save_writeback (char *save_path) {
+    uint32_t sectors[SAVE_WRITEBACK_MAX_SECTORS] __attribute__((aligned(8)));
+
+    if (fatfs_get_file_sectors(save_path, sectors, ADDRESS_TYPE_MEM, SAVE_WRITEBACK_MAX_SECTORS)) {
+        return FLASHCART_ERR_LOAD;
+    }
+
     if (d64_ll_write_save_writeback_lba_list(sectors)) {
         return FLASHCART_ERR_INT;
     }

src/flashcart/64drive/README.md

@@ -2,7 +2,7 @@
 
 ### Official documentation
 
-http://64drive.retroactive.be/64drive_hardware_spec.pdf
+https://web.archive.org/web/20220611032320/http://64drive.retroactive.be/64drive_hardware_spec.pdf
 
 
 ### Save location offset in SDRAM

src/flashcart/flashcart.c

@@ -8,14 +8,12 @@
 #include "utils/utils.h"
 
 #include "flashcart.h"
+#include "flashcart_utils.h"
 
 #include "64drive/64drive.h"
 #include "sc64/sc64.h"
 
 
-#define SAVE_WRITEBACK_MAX_SECTORS  (256)
-
-
 static const size_t SAVE_SIZE[__FLASHCART_SAVE_TYPE_END] = {
     0,
     512,
@@ -27,34 +25,44 @@ static const size_t SAVE_SIZE[__FLASHCART_SAVE_TYPE_END] = {
     KiB(128),
 };
 
-static uint32_t save_writeback_sectors[SAVE_WRITEBACK_MAX_SECTORS] __attribute__((aligned(8)));
 
+static flashcart_err_t dummy_init (void) {
+    return FLASHCART_OK;
+}
 
-static void save_writeback_sectors_callback (uint32_t sector_count, uint32_t file_sector, uint32_t cluster_sector, uint32_t cluster_size) {
+static bool dummy_has_feature (flashcart_features_t feature) {
-    for (uint32_t i = 0; i < cluster_size; i++) {
+    switch (feature) {
-        uint32_t offset = file_sector + i;
+        default:
-        uint32_t sector = cluster_sector + i;
+            return false;
-
-        if ((offset > SAVE_WRITEBACK_MAX_SECTORS) || (offset > sector_count)) {
-            return;
-        }
-
-        save_writeback_sectors[offset] = sector;
     }
 }
 
+static flashcart_err_t dummy_load_rom (char *rom_path, flashcart_progress_callback_t *progress) {
+    return FLASHCART_OK;
+}
 
-static flashcart_err_t dummy_init (void) {
+static flashcart_err_t dummy_load_file (char *file_path, uint32_t rom_offset, uint32_t file_offset) {
+    return FLASHCART_OK;
+}
+
+static flashcart_err_t dummy_load_save (char *save_path) {
+    return FLASHCART_OK;
+}
+
+static flashcart_err_t dummy_set_save_type (flashcart_save_type_t save_type) {
     return FLASHCART_OK;
 }
 
 static flashcart_t *flashcart = &((flashcart_t) {
     .init = dummy_init,
     .deinit = NULL,
-    .load_rom = NULL,
+    .has_feature = dummy_has_feature,
-    .load_file = NULL,
+    .load_rom = dummy_load_rom,
-    .load_save = NULL,
+    .load_file = dummy_load_file,
-    .set_save_type = NULL,
+    .load_save = dummy_load_save,
+    .load_64dd_ipl = NULL,
+    .load_64dd_disk = NULL,
+    .set_save_type = dummy_set_save_type,
     .set_save_writeback = NULL,
 });
 
@@ -69,9 +77,9 @@ static flashcart_t *flashcart = &((flashcart_t) {
 char *flashcart_convert_error_message (flashcart_err_t err) {
     switch (err) {
         case FLASHCART_OK: return "No error";
-        case FLASHCART_ERR_NOT_DETECTED: return "No flashcart hardware was detected";
         case FLASHCART_ERR_OUTDATED: return "Outdated flashcart firmware";
         case FLASHCART_ERR_SD_CARD: return "Error during SD card initialization";
+        case FLASHCART_ERR_BBFS: return "Error during iQue NAND initialization";
         case FLASHCART_ERR_ARGS: return "Invalid argument passed to flashcart function";
         case FLASHCART_ERR_LOAD: return "Error during loading data into flashcart";
         case FLASHCART_ERR_INT: return "Internal flashcart error";
@@ -80,15 +88,20 @@ char *flashcart_convert_error_message (flashcart_err_t err) {
     }
 }
 
-flashcart_err_t flashcart_init (void) {
+flashcart_err_t flashcart_init (const char **storage_prefix) {
     flashcart_err_t err;
 
-    bool sd_card_initialized = debug_init_sdfs("sd:/", -1);
+    if (sys_bbplayer()) {
+        // TODO: Add iQue callbacks
+        *storage_prefix = "bbfs:/";
+        if (bbfs_init()) {
+            return FLASHCART_ERR_BBFS;
+        }
+        return FLASHCART_OK;
+    }
 
-#ifndef NDEBUG
+    *storage_prefix = "sd:/";
-    // NOTE: Some flashcarts doesn't have USB port, can't throw error here
+    bool sd_card_initialized = debug_init_sdfs(*storage_prefix, -1);
-    debug_init_usblog();
-#endif
 
     switch (cart_type) {
         case CART_CI:   // 64drive
@@ -96,6 +109,8 @@ flashcart_err_t flashcart_init (void) {
             break;
 
         case CART_EDX:  // Series X EverDrive-64
+            break;
+
         case CART_ED:   // Original EverDrive-64
             break;
 
@@ -103,15 +118,22 @@ flashcart_err_t flashcart_init (void) {
             flashcart = sc64_get_flashcart();
             break;
 
-        default:
+        default:        // Probably emulator
-            return FLASHCART_ERR_NOT_DETECTED;
+            *storage_prefix = "rom:/";
+            debug_init_isviewer();
+            break;
     }
 
+#ifndef NDEBUG
+    // NOTE: Some flashcarts doesn't have USB port, can't throw error here
+    debug_init_usblog();
+#endif
+
     if ((err = flashcart->init()) != FLASHCART_OK) {
         return err;
     }
 
-    if (!sd_card_initialized) {
+    if ((cart_type != CART_NULL) && (!sd_card_initialized)) {
         return FLASHCART_ERR_SD_CARD;
     }
 
@@ -184,19 +206,11 @@ flashcart_err_t flashcart_load_save (char *save_path, flashcart_save_type_t save
         return err;
     }
 
-    if (flashcart->set_save_writeback) {
+    if (!flashcart->set_save_writeback) {
-        for (int i = 0; i < SAVE_WRITEBACK_MAX_SECTORS; i++) {
+        return FLASHCART_OK;
-            save_writeback_sectors[i] = 0;
-        }
-        if (file_get_sectors(save_path, save_writeback_sectors_callback)) {
-            return FLASHCART_ERR_LOAD;
-        }
-        if ((err = flashcart->set_save_writeback(save_writeback_sectors)) != FLASHCART_OK) {
-            return err;
-        }
     }
 
-    return FLASHCART_OK;
+    return flashcart->set_save_writeback(save_path);
 }
 
 flashcart_err_t flashcart_load_64dd_ipl (char *ipl_path, flashcart_progress_callback_t *progress) {

src/flashcart/flashcart.h

@@ -15,9 +15,9 @@
 /** @brief Flashcart error enumeration */
 typedef enum {
     FLASHCART_OK,
-    FLASHCART_ERR_NOT_DETECTED,
     FLASHCART_ERR_OUTDATED,
     FLASHCART_ERR_SD_CARD,
+    FLASHCART_ERR_BBFS,
     FLASHCART_ERR_ARGS,
     FLASHCART_ERR_LOAD,
     FLASHCART_ERR_INT,
@@ -75,12 +75,12 @@ typedef struct {
     /** @brief The flashcart set save type function */
     flashcart_err_t (*set_save_type) (flashcart_save_type_t save_type);
     /** @brief The flashcart set save writeback function */
-    flashcart_err_t (*set_save_writeback) (uint32_t *sectors);
+    flashcart_err_t (*set_save_writeback) (char *save_path);
 } flashcart_t;
 
 
 char *flashcart_convert_error_message (flashcart_err_t err);
-flashcart_err_t flashcart_init (void);
+flashcart_err_t flashcart_init (const char **storage_prefix);
 flashcart_err_t flashcart_deinit (void);
 bool flashcart_has_feature (flashcart_features_t feature);
 flashcart_err_t flashcart_load_rom (char *rom_path, bool byte_swap, flashcart_progress_callback_t *progress);

src/flashcart/flashcart_utils.c

@@ -5,13 +5,6 @@
 #include "utils/utils.h"
 
 
-void fix_file_size (FIL *fil) {
-    // HACK: Align file size to the SD sector size to prevent FatFs from doing partial sector load.
-    //       We are relying on direct transfer from SD to SDRAM without CPU intervention.
-    //       Sending some extra bytes isn't an issue here.
-    fil->obj.objsize = ALIGN(f_size(fil), FS_SECTOR_SIZE);
-}
-
 void pi_dma_read_data (void *src, void *dst, size_t length) {
     data_cache_hit_writeback_invalidate(dst, length);
     dma_read_async(dst, (uint32_t) (src), length);
@@ -27,3 +20,68 @@ void pi_dma_write_data (void *src, void *dst, size_t length) {
     dma_write_raw_async(src, (uint32_t) (dst), length);
     dma_wait();
 }
+
+void fatfs_fix_file_size (FIL *fil) {
+    // HACK: Align file size to the SD sector size to prevent FatFs from doing partial sector load.
+    //       We are relying on direct transfer from SD to SDRAM without CPU intervention.
+    //       Sending some extra bytes isn't an issue here.
+    fil->obj.objsize = ALIGN(f_size(fil), FS_SECTOR_SIZE);
+}
+
+bool fatfs_get_file_sectors (char *path, uint32_t *address, address_type_t type, uint32_t max_sectors) {
+    FATFS *fs;
+    FIL fil;
+    bool error = false;
+
+    if (f_open(&fil, strip_fs_prefix(path), FA_READ) != FR_OK) {
+        return true;
+    }
+
+    fatfs_fix_file_size(&fil);
+
+    fs = fil.obj.fs;
+
+    uint32_t sector_count = MIN(f_size(&fil) / FS_SECTOR_SIZE, max_sectors);
+
+    for (uint32_t file_sector = 0; file_sector < sector_count; file_sector += fs->csize) {
+        if ((f_lseek(&fil, (file_sector * FS_SECTOR_SIZE) + (FS_SECTOR_SIZE / 2))) != FR_OK) {
+            error = true;
+            break;
+        }
+
+        uint32_t cluster = fil.clust;
+
+        if (cluster >= fs->n_fatent) {
+            error = true;
+            break;
+        }
+
+        uint32_t cluster_sector = (fs->database + ((LBA_t) (fs->csize) * (cluster - 2)));
+
+        for (uint32_t i = 0; i < fs->csize; i++) {
+            uint32_t sector = (cluster_sector + i);
+
+            if ((file_sector + i) >= sector_count) {
+                break;
+            }
+
+            switch (type) {
+                case ADDRESS_TYPE_MEM:
+                    *address = sector;
+                    break;
+
+                case ADDRESS_TYPE_PI:
+                    io_write((uint32_t) (address), sector);
+                    break;
+            }
+
+            address++;
+        }
+    }
+
+    if (f_close(&fil) != FR_OK) {
+        error = true;
+    }
+
+    return error;
+}

src/flashcart/flashcart_utils.h

@@ -8,12 +8,26 @@
 #define FLASHCART_UTILS_H__
 
 
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+
 #include <fatfs/ff.h>
 
 
-void fix_file_size (FIL *fil);
+#define SAVE_WRITEBACK_MAX_SECTORS  (256)
+
+
+typedef enum {
+    ADDRESS_TYPE_MEM,
+    ADDRESS_TYPE_PI,
+} address_type_t;
+
+
 void pi_dma_read_data (void *src, void *dst, size_t length);
 void pi_dma_write_data (void *src, void *dst, size_t length);
+void fatfs_fix_file_size (FIL *fil);
+bool fatfs_get_file_sectors (char *path, uint32_t *address, address_type_t address_type, uint32_t max_sectors);
 
 
 #endif

src/flashcart/sc64/sc64.c

@@ -75,9 +75,6 @@ static const uint8_t vzone_to_pzone[DISK_TYPES][DISK_ZONES] = {
 static const uint8_t rom_zones[DISK_TYPES] = { 5, 7, 9, 11, 13, 15, 16 };
 
 
-static uint32_t disk_sectors_start_offset;
-
-
 static flashcart_err_t load_to_flash (FIL *fil, void *address, size_t size, UINT *br, flashcart_progress_callback_t *progress) {
     size_t erase_block_size;
     UINT bp;
@@ -110,23 +107,6 @@ static flashcart_err_t load_to_flash (FIL *fil, void *address, size_t size, UINT
     return FLASHCART_OK;
 }
 
-static uint32_t disk_sectors_start (uint32_t offset) {
-    disk_sectors_start_offset = offset;
-    return (offset + (DISK_MAX_SECTORS * sizeof(uint32_t)));
-}
-
-static void disk_sectors_callback (uint32_t sector_count, uint32_t file_sector, uint32_t cluster_sector, uint32_t cluster_size) {
-    for (uint32_t i = 0; i < cluster_size; i++) {
-        uint32_t offset = file_sector + i;
-        uint32_t sector = cluster_sector + i;
-
-        if ((offset > DISK_MAX_SECTORS) || (offset > sector_count)) {
-            return;
-        }
-
-        io_write(ROM_ADDRESS + disk_sectors_start_offset + (offset * sizeof(uint32_t)), sector);
-    }
-}
 
 static bool disk_zone_track_is_bad (uint8_t zone, uint8_t track, flashcart_disk_parameters_t *disk_parameters) {
     for (int i = 0; i < DISK_BAD_TRACKS_PER_ZONE; i++) {
@@ -153,7 +133,7 @@ static void disk_set_thb_mapping (uint32_t offset, uint16_t track, uint8_t head,
     io_write(ROM_ADDRESS + offset + (index * sizeof(uint32_t)), mapping);
 }
 
-static uint32_t disk_load_thb_table (uint32_t offset, flashcart_disk_parameters_t *disk_parameters) {
+static void disk_load_thb_table (flashcart_disk_parameters_t *disk_parameters, uint32_t *thb_table_offset, uint32_t *current_offset) {
     int file_offset = 0;
 
     uint16_t lba = 0;
@@ -175,15 +155,15 @@ static uint32_t disk_load_thb_table (uint32_t offset, flashcart_disk_parameters_
             uint16_t track = track_offset + zone_track;
 
             if (disk_zone_track_is_bad(pzone, zone_track, disk_parameters)) {
-                disk_set_thb_mapping(offset, track, head, 0, false, false, 0);
+                disk_set_thb_mapping(*current_offset, track, head, 0, false, false, 0);
-                disk_set_thb_mapping(offset, track, head, 1, false, false, 0);
+                disk_set_thb_mapping(*current_offset, track, head, 1, false, false, 0);
                 continue;
             }
 
             for (uint8_t block = 0; block < DISK_BLOCKS; block += 1) {
                 bool valid = !(disk_system_lba_is_bad(lba, disk_parameters));
                 bool writable = (vzone >= rom_zones[disk_parameters->disk_type]);
-                disk_set_thb_mapping(offset, track, head, (starting_block ^ block), valid, writable, file_offset);
+                disk_set_thb_mapping(*current_offset, track, head, (starting_block ^ block), valid, writable, file_offset);
                 file_offset += (sector_length * DISK_SECTORS_PER_BLOCK);
                 lba += 1;
             }
@@ -192,7 +172,19 @@ static uint32_t disk_load_thb_table (uint32_t offset, flashcart_disk_parameters_
         }
     }
 
-    return (offset + (DISK_TRACKS * DISK_HEADS * DISK_BLOCKS * sizeof(uint32_t)));
+    *thb_table_offset = *current_offset;
+    *current_offset += (DISK_TRACKS * DISK_HEADS * DISK_BLOCKS * sizeof(uint32_t));
+}
+
+static bool disk_load_sector_table (char *path, uint32_t *sector_table_offset, uint32_t *current_offset) {
+    if (fatfs_get_file_sectors(path, (uint32_t *) (ROM_ADDRESS + *current_offset), ADDRESS_TYPE_PI, DISK_MAX_SECTORS)) {
+        return true;
+    }
+
+    *sector_table_offset = *current_offset;
+    *current_offset += (DISK_MAX_SECTORS * sizeof(uint32_t));
+
+    return false;
 }
 
 
@@ -270,11 +262,11 @@ static flashcart_err_t sc64_load_rom (char *rom_path, flashcart_progress_callbac
     FIL fil;
     UINT br;
 
-    if (f_open(&fil, strip_sd_prefix(rom_path), FA_READ) != FR_OK) {
+    if (f_open(&fil, strip_fs_prefix(rom_path), FA_READ) != FR_OK) {
         return FLASHCART_ERR_LOAD;
     }
 
-    fix_file_size(&fil);
+    fatfs_fix_file_size(&fil);
 
     size_t rom_size = f_size(&fil);
 
@@ -351,11 +343,11 @@ static flashcart_err_t sc64_load_file (char *file_path, uint32_t rom_offset, uin
     FIL fil;
     UINT br;
 
-    if (f_open(&fil, strip_sd_prefix(file_path), FA_READ) != FR_OK) {
+    if (f_open(&fil, strip_fs_prefix(file_path), FA_READ) != FR_OK) {
         return FLASHCART_ERR_LOAD;
     }
 
-    fix_file_size(&fil);
+    fatfs_fix_file_size(&fil);
 
     size_t file_size = f_size(&fil) - file_offset;
 
@@ -413,7 +405,7 @@ static flashcart_err_t sc64_load_save (char *save_path) {
     FIL fil;
     UINT br;
 
-    if (f_open(&fil, strip_sd_prefix(save_path), FA_READ) != FR_OK) {
+    if (f_open(&fil, strip_fs_prefix(save_path), FA_READ) != FR_OK) {
         return FLASHCART_ERR_LOAD;
     }
 
@@ -439,11 +431,11 @@ static flashcart_err_t sc64_load_64dd_ipl (char *ipl_path, flashcart_progress_ca
     FIL fil;
     UINT br;
 
-    if (f_open(&fil, strip_sd_prefix(ipl_path), FA_READ) != FR_OK) {
+    if (f_open(&fil, strip_fs_prefix(ipl_path), FA_READ) != FR_OK) {
         return FLASHCART_ERR_LOAD;
     }
 
-    fix_file_size(&fil);
+    fatfs_fix_file_size(&fil);
 
     size_t ipl_size = f_size(&fil);
 
@@ -476,19 +468,17 @@ static flashcart_err_t sc64_load_64dd_ipl (char *ipl_path, flashcart_progress_ca
 }
 
 static flashcart_err_t sc64_load_64dd_disk (char *disk_path, flashcart_disk_parameters_t *disk_parameters) {
-    sc64_disk_mapping_t mapping = { .count = 0 };
+    sc64_disk_mapping_t mapping;
-    uint32_t next_mapping_offset = DISK_MAPPING_ROM_OFFSET;
+    uint32_t mapping_offset = DISK_MAPPING_ROM_OFFSET;
+    sc64_drive_type_t drive_type = (disk_parameters->development_drive ? DRIVE_TYPE_DEVELOPMENT : DRIVE_TYPE_RETAIL);
 
     // TODO: Support loading multiple disks
-    // LOOP START
+    for (mapping.count = 0; mapping.count < 1; mapping.count++) {
-        mapping.disks[mapping.count].thb_table = next_mapping_offset;
+        disk_load_thb_table(disk_parameters++, &mapping.disks[mapping.count].thb_table, &mapping_offset);
-        mapping.disks[mapping.count].sector_table = disk_load_thb_table(mapping.disks[mapping.count].thb_table, disk_parameters);
+        if (disk_load_sector_table(disk_path++, &mapping.disks[mapping.count].sector_table, &mapping_offset)) {
-        next_mapping_offset = disk_sectors_start(mapping.disks[mapping.count].sector_table);
-        if (file_get_sectors(disk_path, disk_sectors_callback)) {
             return FLASHCART_ERR_LOAD;
         }
-        mapping.count += 1;
+    }
-    // LOOP END
 
     if (mapping.count == 0) {
         return FLASHCART_ERR_ARGS;
@@ -498,8 +488,6 @@ static flashcart_err_t sc64_load_64dd_disk (char *disk_path, flashcart_disk_para
         return FLASHCART_ERR_INT;
     }
 
-    sc64_drive_type_t drive_type = disk_parameters->development_drive ? DRIVE_TYPE_DEVELOPMENT : DRIVE_TYPE_RETAIL;
-
     const struct {
         sc64_cfg_id_t id;
         uint32_t value;
@@ -559,7 +547,13 @@ static flashcart_err_t sc64_set_save_type (flashcart_save_type_t save_type) {
     return FLASHCART_OK;
 }
 
-static flashcart_err_t sc64_set_save_writeback (uint32_t *sectors) {
+static flashcart_err_t sc64_set_save_writeback (char *save_path) {
+    uint32_t sectors[SAVE_WRITEBACK_MAX_SECTORS] __attribute__((aligned(8)));
+
+    if (fatfs_get_file_sectors(save_path, sectors, ADDRESS_TYPE_MEM, SAVE_WRITEBACK_MAX_SECTORS)) {
+        return FLASHCART_ERR_LOAD;
+    }
+
     pi_dma_write_data(sectors, SC64_BUFFERS->BUFFER, 1024);
 
     if (sc64_ll_writeback_enable(SC64_BUFFERS->BUFFER) != SC64_OK) {

src/libs/libspng

@@ -1 +1 @@
-Subproject commit e5c1fc470fceaca08b8c30dc40768c28b82b9e12
+Subproject commit adc94393dbeddf9e027d1b2dfff7c1bab975224e

src/libs/miniz

@@ -1 +1 @@
-Subproject commit 18795fa61e590521381ba9e1fa4a4ab362b095f6
+Subproject commit 16413c213de38e703d883006193734e8b1178d5d

src/menu/cart_load.c

@@ -19,10 +19,9 @@
 
 
 static bool is_64dd_connected (void) {
-    return (
+    bool is_64dd_io_present = ((io_read(0x05000540) & 0x0000FFFF) == 0x0000);
-        ((io_read(0x05000540) & 0x0000FFFF) == 0x0000) ||
+    bool is_64dd_ipl_present = (io_read(0x06001010) == 0x2129FFF8);
-        (io_read(0x06001010) == 0x2129FFF8)
+    return (is_64dd_io_present || is_64dd_ipl_present);
-    );
 }
 
 static bool create_saves_subdirectory (path_t *path) {
@@ -112,7 +111,7 @@ cart_load_err_t cart_load_64dd_ipl_and_disk (menu_t *menu, flashcart_progress_ca
         return CART_LOAD_ERR_EXP_PAK_NOT_FOUND;
     }
 
-    path_t *path = path_init("sd:/", DDIPL_LOCATION);
+    path_t *path = path_init(menu->storage_prefix, DDIPL_LOCATION);
     flashcart_disk_parameters_t disk_parameters;
 
     disk_parameters.development_drive = (menu->load.disk_info.region == DISK_REGION_DEVELOPMENT);
@@ -154,7 +153,7 @@ cart_load_err_t cart_load_64dd_ipl_and_disk (menu_t *menu, flashcart_progress_ca
 }
 
 cart_load_err_t cart_load_emulator (menu_t *menu, cart_load_emu_type_t emu_type, flashcart_progress_callback_t progress) {
-    path_t *path = path_init("sd:/", EMU_LOCATION);
+    path_t *path = path_init(menu->storage_prefix, EMU_LOCATION);
 
     flashcart_save_type_t save_type = FLASHCART_SAVE_TYPE_NONE;
     uint32_t emulated_rom_offset = 0x200000;

src/menu/components.h

@@ -24,7 +24,7 @@ void component_progressbar_draw (int x0, int y0, int x1, int y1, float progress)
 void component_seekbar_draw (float progress);
 void component_loader_draw (float position);
 void component_scrollbar_draw (int x, int y, int width, int height, int position, int items, int visible_items);
-void component_file_list_scrollbar_draw (int position, int items, int visible_items);
+void component_list_scrollbar_draw (int position, int items, int visible_items);
 void component_dialog_draw (int width, int height);
 void component_messagebox_draw (char *fmt, ...);
 void component_main_text_draw (rdpq_align_t align, rdpq_valign_t valign, char *fmt, ...);
@@ -64,7 +64,7 @@ typedef struct {
     surface_t *image;
 } component_boxart_t;
 
-component_boxart_t *component_boxart_init (char *game_code);
+component_boxart_t *component_boxart_init (const char *storage_prefix, char *game_code);
 void component_boxart_free (component_boxart_t *b);
 void component_boxart_draw (component_boxart_t *b);
 

src/menu/components/background.c

@@ -1,4 +1,4 @@
-#include <fatfs/ff.h>
+#include <stdio.h>
 #include <stdlib.h>
 
 #include "../components.h"
@@ -31,22 +31,21 @@ static void load_from_cache (component_background_t *c) {
         return;
     }
 
-    FIL fil;
+    FILE *f;
-    UINT bytes_read;
 
-    if (f_open(&fil, strip_sd_prefix(c->cache_location), FA_READ) != FR_OK) {
+    if ((f = fopen(c->cache_location, "rb")) == NULL) {
         return;
     }
 
     cache_metadata_t cache_metadata;
 
-    if ((f_read(&fil, &cache_metadata, sizeof(cache_metadata), &bytes_read) != FR_OK) || (bytes_read != sizeof(cache_metadata))) {
+    if (fread(&cache_metadata, sizeof(cache_metadata), 1, f) != 1) {
-        f_close(&fil);
+        fclose(f);
         return;
     }
 
     if (cache_metadata.magic != CACHE_METADATA_MAGIC || cache_metadata.width > DISPLAY_WIDTH || cache_metadata.height > DISPLAY_HEIGHT) {
-        f_close(&fil);
+        fclose(f);
         return;
     }
 
@@ -57,17 +56,17 @@ static void load_from_cache (component_background_t *c) {
         surface_free(c->image);
         free(c->image);
         c->image = NULL;
-        f_close(&fil);
+        fclose(f);
         return;
     }
 
-    if ((f_read(&fil, c->image->buffer, cache_metadata.size, &bytes_read) != FR_OK) || (bytes_read != cache_metadata.size)) {
+    if (fread(c->image->buffer, cache_metadata.size, 1, f) != 1) {
         surface_free(c->image);
         free(c->image);
         c->image = NULL;
     }
 
-    f_close(&fil);
+    fclose(f);
 }
 
 static void save_to_cache (component_background_t *c) {
@@ -75,9 +74,9 @@ static void save_to_cache (component_background_t *c) {
         return;
     }
 
-    FIL fil;
+    FILE *f;
-    UINT bytes_written;
+
-    if (f_open(&fil, strip_sd_prefix(c->cache_location), FA_WRITE | FA_CREATE_ALWAYS) != FR_OK) {
+    if ((f = fopen(c->cache_location, "wb")) == NULL) {
         return;
     }
 
@@ -88,10 +87,10 @@ static void save_to_cache (component_background_t *c) {
         .size = (c->image->height * c->image->stride),
     };
 
-    f_write(&fil, &cache_metadata, sizeof(cache_metadata), &bytes_written);
+    fwrite(&cache_metadata, sizeof(cache_metadata), 1, f);
-    f_write(&fil, c->image->buffer, cache_metadata.size, &bytes_written);
+    fwrite(c->image->buffer, cache_metadata.size, 1, f);
 
-    f_close(&fil);
+    fclose(f);
 }
 
 static void prepare_background (component_background_t *c) {
@@ -166,7 +165,7 @@ static void display_list_free (void *arg) {
 void component_background_init (char *cache_location) {
     if (!background) {
         background = calloc(1, sizeof(component_background_t));
-        background->cache_location = cache_location;
+        background->cache_location = strdup(cache_location);
         load_from_cache(background);
         prepare_background(background);
     }
@@ -183,6 +182,9 @@ void component_background_free (void) {
             rdpq_call_deferred(display_list_free, background->image_display_list);
             background->image_display_list = NULL;
         }
+        if (background->cache_location) {
+            free(background->cache_location);
+        }
         free(background);
         background = NULL;
     }

src/menu/components/boxart.c

@@ -6,9 +6,8 @@
 #include "constants.h"
 #include "utils/fs.h"
 
-#ifndef BOXART_DIRECTORY
+
-#define BOXART_DIRECTORY    "sd:/menu/boxart"
+#define BOXART_DIRECTORY    "menu/boxart"
-#endif
 
 
 static void png_decoder_callback (png_err_t err, surface_t *decoded_image, void *callback_data) {
@@ -18,25 +17,38 @@ static void png_decoder_callback (png_err_t err, surface_t *decoded_image, void
 }
 
 
-component_boxart_t *component_boxart_init (char *game_code) {
+component_boxart_t *component_boxart_init (const char *storage_prefix, char *game_code) {
-    component_boxart_t *b = calloc(1, sizeof(component_boxart_t));
+    component_boxart_t *b;
+    char file_name[8];
 
-    if (b) {
+    if ((b = calloc(1, sizeof(component_boxart_t))) == NULL) {
-        b->loading = true;
+        return NULL;
-        char *path = alloca(strlen(BOXART_DIRECTORY) + 1 + 7 + 1);
-
-        // TODO: This is bad, we should only check for 3 letter codes
-        sprintf(path, "%s/%.3s.png", BOXART_DIRECTORY, game_code);
-        if (png_decoder_start(path, BOXART_WIDTH, BOXART_HEIGHT, png_decoder_callback, b) != PNG_OK) {
-            sprintf(path, "%s/%.2s.png", BOXART_DIRECTORY, &game_code[1]);
-            if (png_decoder_start(path, BOXART_WIDTH, BOXART_HEIGHT, png_decoder_callback, b) != PNG_OK) {
-                free(b);
-                b = NULL;
-            }
-        }
     }
 
-    return b;
+    b->loading = true;
+
+    path_t *path = path_init(storage_prefix, BOXART_DIRECTORY);
+
+    sprintf(file_name, "%.3s.png", game_code);
+    path_push(path, file_name);
+    if (png_decoder_start(path_get(path), BOXART_WIDTH, BOXART_HEIGHT, png_decoder_callback, b) == PNG_OK) {
+        path_free(path);
+        return b;
+    }
+    path_pop(path);
+
+    // TODO: This is bad, we should only check for 3 letter codes
+    sprintf(file_name, "%.2s.png", game_code + 1);
+    path_push(path, file_name);
+    if (png_decoder_start(path_get(path), BOXART_WIDTH, BOXART_HEIGHT, png_decoder_callback, b) == PNG_OK) {
+        path_free(path);
+        return b;
+    }
+
+    path_free(path);
+    free(b);
+
+    return NULL;
 }
 
 void component_boxart_free (component_boxart_t *b) {

src/menu/components/common.c

@@ -80,12 +80,12 @@ void component_scrollbar_draw (int x, int y, int width, int height, int position
     }
 }
 
-void component_file_list_scrollbar_draw (int position, int items, int visible_items) {
+void component_list_scrollbar_draw (int position, int items, int visible_items) {
     component_scrollbar_draw(
-        FILE_LIST_SCROLLBAR_X,
+        LIST_SCROLLBAR_X,
-        FILE_LIST_SCROLLBAR_Y,
+        LIST_SCROLLBAR_Y,
-        FILE_LIST_SCROLLBAR_WIDTH,
+        LIST_SCROLLBAR_WIDTH,
-        FILE_LIST_SCROLLBAR_HEIGHT,
+        LIST_SCROLLBAR_HEIGHT,
         position,
         items,
         visible_items
@@ -121,6 +121,10 @@ void component_messagebox_draw (char *fmt, ...) {
         .wrap = WRAP_WORD
     }, FNT_DEFAULT, formatted, &paragraph_nbytes);
 
+    if (formatted != buffer) {
+        free(formatted);
+    }
+
     component_dialog_draw(
         paragraph->bbox.x1 - paragraph->bbox.x0 + MESSAGEBOX_MARGIN,
         paragraph->bbox.y1 - paragraph->bbox.y0 + MESSAGEBOX_MARGIN
@@ -154,6 +158,10 @@ void component_main_text_draw (rdpq_align_t align, rdpq_valign_t valign, char *f
         formatted,
         nbytes
     );
+
+    if (formatted != buffer) {
+        free(formatted);
+    }
 }
 
 void component_actions_bar_text_draw (rdpq_align_t align, rdpq_valign_t valign, char *fmt, ...) {
@@ -179,4 +187,8 @@ void component_actions_bar_text_draw (rdpq_align_t align, rdpq_valign_t valign,
         formatted,
         nbytes
     );
+
+    if (formatted != buffer) {
+        free(formatted);
+    }
 }

src/menu/components/constants.h

@@ -77,19 +77,19 @@
 #define BOXART_Y                        (LAYOUT_ACTIONS_SEPARATOR_Y - BOXART_HEIGHT - 24)
 
 /** @brief The scroll bar width. */
-#define FILE_LIST_SCROLLBAR_WIDTH       (12)
+#define LIST_SCROLLBAR_WIDTH            (12)
 /** @brief The scroll bar height. */
-#define FILE_LIST_SCROLLBAR_HEIGHT      (LAYOUT_ACTIONS_SEPARATOR_Y - OVERSCAN_HEIGHT)
+#define LIST_SCROLLBAR_HEIGHT           (LAYOUT_ACTIONS_SEPARATOR_Y - OVERSCAN_HEIGHT)
 /** @brief The scroll bar position on the X axis. */
-#define FILE_LIST_SCROLLBAR_X           (VISIBLE_AREA_X1 - FILE_LIST_SCROLLBAR_WIDTH)
+#define LIST_SCROLLBAR_X                (VISIBLE_AREA_X1 - LIST_SCROLLBAR_WIDTH)
 /** @brief The scroll bar position on the Y axis. */
-#define FILE_LIST_SCROLLBAR_Y           (VISIBLE_AREA_Y0)
+#define LIST_SCROLLBAR_Y                (VISIBLE_AREA_Y0)
 
 /** @brief The maximum amount of file list entries. */
-#define FILE_LIST_ENTRIES               (20)
+#define LIST_ENTRIES                    (20)
 /** @brief The maximum width available for a file list entry. */
 #define FILE_LIST_MAX_WIDTH             (480)
-#define FILE_LIST_HIGHLIGHT_WIDTH       (VISIBLE_AREA_X1 - VISIBLE_AREA_X0 - FILE_LIST_SCROLLBAR_WIDTH)
+#define FILE_LIST_HIGHLIGHT_WIDTH       (VISIBLE_AREA_X1 - VISIBLE_AREA_X0 - LIST_SCROLLBAR_WIDTH)
 #define FILE_LIST_HIGHLIGHT_X           (VISIBLE_AREA_X0)
 
 /** @brief The default background colour. */

src/menu/components/file_list.c

@@ -8,15 +8,19 @@
 static const char *dir_prefix = "/";
 
 
-static int format_file_size (char *buffer, int size) {
+static int format_file_size (char *buffer, int64_t size) {
-    if (size < 8 * 1024) {
+    if (size < 0) {
-        return sprintf(buffer, "%d B", size);
+        return sprintf(buffer, "unknown");
+    } else if (size == 0) {
+        return sprintf(buffer, "empty");
+    } else if (size < 8 * 1024) {
+        return sprintf(buffer, "%lld B", size);
     } else if (size < 8 * 1024 * 1024) {
-        return sprintf(buffer, "%d kB", size / 1024);
+        return sprintf(buffer, "%lld kB", size / 1024);
     } else if (size < 1 * 1024 * 1024 * 1024) {
-        return sprintf(buffer, "%d MB", size / 1024 / 1024);
+        return sprintf(buffer, "%lld MB", size / 1024 / 1024);
     } else {
-        return sprintf(buffer, "%d GB", size / 1024 / 1024 / 1024);
+        return sprintf(buffer, "%lld GB", size / 1024 / 1024 / 1024);
     }
 }
 
@@ -24,14 +28,14 @@ static int format_file_size (char *buffer, int size) {
 void component_file_list_draw (entry_t *list, int entries, int selected) {
     int starting_position = 0;
 
-    if (entries > FILE_LIST_ENTRIES && selected >= (FILE_LIST_ENTRIES / 2)) {
+    if (entries > LIST_ENTRIES && selected >= (LIST_ENTRIES / 2)) {
-        starting_position = selected - (FILE_LIST_ENTRIES / 2);
+        starting_position = selected - (LIST_ENTRIES / 2);
-        if (starting_position >= entries - FILE_LIST_ENTRIES) {
+        if (starting_position >= entries - LIST_ENTRIES) {
-            starting_position = entries - FILE_LIST_ENTRIES;
+            starting_position = entries - LIST_ENTRIES;
         }
     }
 
-    component_file_list_scrollbar_draw(selected, entries, FILE_LIST_ENTRIES);
+    component_list_scrollbar_draw(selected, entries, LIST_ENTRIES);
 
     if (entries == 0) {
         component_main_text_draw(
@@ -43,10 +47,10 @@ void component_file_list_draw (entry_t *list, int entries, int selected) {
         rdpq_paragraph_t *file_list_layout;
         rdpq_paragraph_t *layout;
 
-        size_t name_lengths[FILE_LIST_ENTRIES];
+        size_t name_lengths[LIST_ENTRIES];
         size_t total_length = 1;
 
-        for (int i = 0; i < FILE_LIST_ENTRIES; i++) {
+        for (int i = 0; i < LIST_ENTRIES; i++) {
             int entry_index = starting_position + i;
 
             if (entry_index >= entries) {
@@ -72,7 +76,7 @@ void component_file_list_draw (entry_t *list, int entries, int selected) {
             file_list_layout
         );
 
-        for (int i = 0; i < FILE_LIST_ENTRIES; i++) {
+        for (int i = 0; i < LIST_ENTRIES; i++) {
             int entry_index = starting_position + i;
 
             entry_t *entry = &list[entry_index];
@@ -130,7 +134,7 @@ void component_file_list_draw (entry_t *list, int entries, int selected) {
 
         rdpq_paragraph_builder_begin(
             &(rdpq_textparms_t) {
-                .width = VISIBLE_AREA_WIDTH - FILE_LIST_SCROLLBAR_WIDTH - (TEXT_MARGIN_HORIZONTAL * 2),
+                .width = VISIBLE_AREA_WIDTH - LIST_SCROLLBAR_WIDTH - (TEXT_MARGIN_HORIZONTAL * 2),
                 .height = LAYOUT_ACTIONS_SEPARATOR_Y - VISIBLE_AREA_Y0  - (TEXT_MARGIN_VERTICAL * 2),
                 .align = ALIGN_RIGHT,
                 .wrap = WRAP_ELLIPSES,
@@ -139,7 +143,7 @@ void component_file_list_draw (entry_t *list, int entries, int selected) {
             NULL
         );
 
-        char file_size[8];
+        char file_size[16];
 
         for (int i = starting_position; i < entries; i++) {
             entry_t *entry = &list[i];
@@ -148,7 +152,7 @@ void component_file_list_draw (entry_t *list, int entries, int selected) {
                 rdpq_paragraph_builder_span(file_size, format_file_size(file_size, entry->size));
             }
 
-            if ((i + 1) == (starting_position + FILE_LIST_ENTRIES)) {
+            if ((i + 1) == (starting_position + LIST_ENTRIES)) {
                 break;
             }
 

src/menu/disk_info.c

@@ -1,6 +1,6 @@
-#include <fatfs/ff.h>
 #include <stdbool.h>
 #include <stdint.h>
+#include <stdio.h>
 #include <string.h>
 
 #include "disk_info.h"
@@ -39,18 +39,14 @@ static const int disk_id_lbas[DISK_ID_LBA_COUNT] = {
 };
 
 
-static bool load_system_area_lba (FIL *fil, int lba, uint8_t *buffer) {
+static bool load_system_area_lba (FILE *f, int lba, uint8_t *buffer) {
-    UINT bytes_read;
     if (lba >= SYSTEM_AREA_LBA_COUNT) {
         return true;
     }
-    if (f_lseek(fil, SYSTEM_AREA_LBA_LENGTH * lba) != FR_OK) {
+    if (fseek(f, SYSTEM_AREA_LBA_LENGTH * lba, SEEK_SET)) {
         return true;
     }
-    if (f_read(fil, buffer, SYSTEM_AREA_LBA_LENGTH, &bytes_read) != FR_OK) {
+    if (fread(buffer, SYSTEM_AREA_LBA_LENGTH, 1, f) != 1) {
-        return true;
-    }
-    if (bytes_read != SYSTEM_AREA_LBA_LENGTH) {
         return true;
     }
     return false;
@@ -113,7 +109,7 @@ static void update_bad_system_area_lbas (disk_info_t *disk_info) {
     }
 }
 
-static disk_err_t load_and_verify_system_data_lba (FIL *fil, disk_info_t *disk_info) {
+static disk_err_t load_and_verify_system_data_lba (FILE *f, disk_info_t *disk_info) {
     uint8_t buffer[SYSTEM_AREA_LBA_LENGTH];
     int sector_length;
 
@@ -122,7 +118,7 @@ static disk_err_t load_and_verify_system_data_lba (FIL *fil, disk_info_t *disk_i
     for (int i = 0; i < SYSTEM_DATA_LBA_COUNT; i++) {
         int lba = system_data_lbas[i];
 
-        if (load_system_area_lba(fil, lba, buffer)) {
+        if (load_system_area_lba(f, lba, buffer)) {
             return DISK_ERR_IO;
         }
 
@@ -155,7 +151,7 @@ static disk_err_t load_and_verify_system_data_lba (FIL *fil, disk_info_t *disk_i
     return valid_system_data_lba_found ? DISK_OK : DISK_ERR_INVALID;
 }
 
-static disk_err_t load_and_verify_disk_id_lba (FIL *fil, disk_info_t *disk_info) {
+static disk_err_t load_and_verify_disk_id_lba (FILE *f, disk_info_t *disk_info) {
     uint8_t buffer[SYSTEM_AREA_LBA_LENGTH];
 
     bool valid_disk_id_lba_found = false;
@@ -163,7 +159,7 @@ static disk_err_t load_and_verify_disk_id_lba (FIL *fil, disk_info_t *disk_info)
     for (int i = 0; i < DISK_ID_LBA_COUNT; i++) {
         int lba = disk_id_lbas[i];
 
-        if (load_system_area_lba(fil, lba, buffer)) {
+        if (load_system_area_lba(f, lba, buffer)) {
             return DISK_ERR_IO;
         }
 
@@ -180,29 +176,27 @@ static disk_err_t load_and_verify_disk_id_lba (FIL *fil, disk_info_t *disk_info)
 }
 
 
-disk_err_t disk_info_load (char *path, disk_info_t *disk_info) {
+disk_err_t disk_info_load (path_t *path, disk_info_t *disk_info) {
-    FIL fil;
+    FILE *f;
     disk_err_t err;
 
     for (int i = 0; i < SYSTEM_AREA_LBA_COUNT; i++) {
         disk_info->bad_system_area_lbas[i] = false;
     }
 
-    if (f_open(&fil, strip_sd_prefix(path), FA_READ) != FR_OK) {
+    if ((f = fopen(path_get(path), "rb")) == NULL) {
         return DISK_ERR_NO_FILE;
     }
-
+    setbuf(f, NULL);
-    if ((err = load_and_verify_system_data_lba(&fil, disk_info)) != DISK_OK) {
+    if ((err = load_and_verify_system_data_lba(f, disk_info)) != DISK_OK) {
-        f_close(&fil);
+        fclose(f);
         return err;
     }
-
+    if ((err = load_and_verify_disk_id_lba(f, disk_info)) != DISK_OK) {
-    if ((err = load_and_verify_disk_id_lba(&fil, disk_info)) != DISK_OK) {
+        fclose(f);
-        f_close(&fil);
         return err;
     }
-
+    if (fclose(f)) {
-    if (f_close(&fil) != FR_OK) {
         return DISK_ERR_IO;
     }
 

src/menu/disk_info.h

@@ -11,6 +11,9 @@
 #include <stdbool.h>
 #include <stdint.h>
 
+#include "path.h"
+
+
 /** @brief Disk state enumeration. */
 typedef enum {
     DISK_OK,
@@ -49,7 +52,7 @@ typedef struct {
 } disk_info_t;
 
 
-disk_err_t disk_info_load (char *path, disk_info_t *disk_info);
+disk_err_t disk_info_load (path_t *path, disk_info_t *disk_info);
 
 
 #endif

src/menu/fonts.c

@@ -1,10 +1,17 @@
 #include <libdragon.h>
 
 #include "fonts.h"
+#include "utils/fs.h"
 
 
-static void load_default_font (void) {
+static void load_default_font (char *custom_font_path) {
-    rdpq_font_t *default_font = rdpq_font_load("rom:/FiraMonoBold.font64");
+    char *font_path = "rom:/FiraMonoBold.font64";
+
+    if (custom_font_path && file_exists(custom_font_path)) {
+        font_path = custom_font_path;
+    }
+
+    rdpq_font_t *default_font = rdpq_font_load(font_path);
 
     rdpq_font_style(default_font, STL_DEFAULT, &((rdpq_fontstyle_t) { .color = RGBA32(0xFF, 0xFF, 0xFF, 0xFF) }));
     rdpq_font_style(default_font, STL_GREEN, &((rdpq_fontstyle_t) { .color = RGBA32(0x70, 0xFF, 0x70, 0xFF) }));
@@ -17,6 +24,6 @@ static void load_default_font (void) {
 }
 
 
-void fonts_init (void) {
+void fonts_init (char *custom_font_path) {
-    load_default_font();
+    load_default_font(custom_font_path);
 }

src/menu/fonts.h

@@ -23,7 +23,7 @@ typedef enum {
 } menu_font_style_t;
 
 
-void fonts_init (void);
+void fonts_init (char *custom_font_path);
 
 
 #endif

src/menu/menu.c

@@ -20,12 +20,15 @@
 #include "views/views.h"
 
 
-#define MENU_DIRECTORY      "sd:/menu"
+#define MENU_DIRECTORY          "/menu"
-#define CACHE_DIRECTORY     "sd:/menu/cache"
+#define MENU_SETTINGS_FILE      "config.ini"
-#define BACKGROUND_CACHE    "sd:/menu/cache/background.data"
+#define MENU_CUSTOM_FONT_FILE   "custom.font64"
 
-#define FRAMERATE_DIVIDER   (2)
+#define MENU_CACHE_DIRECTORY    "cache"
-#define LAG_REPORT          (false)
+#define BACKGROUND_CACHE_FILE   "background.data"
+
+#define FRAMERATE_DIVIDER       (2)
+#define LAG_REPORT              (false)
 
 
 static menu_t *menu;
@@ -62,7 +65,6 @@ static void menu_init (boot_params_t *boot_params) {
     rdpq_init();
     dfs_init(DFS_DEFAULT_LOCATION);
 
-    fonts_init();
     sound_init_default();
 
     menu = calloc(1, sizeof(menu_t));
@@ -71,31 +73,39 @@ static void menu_init (boot_params_t *boot_params) {
     menu->mode = MENU_MODE_NONE;
     menu->next_mode = MENU_MODE_STARTUP;
 
-    menu->flashcart_err = flashcart_init();
+    menu->flashcart_err = flashcart_init(&menu->storage_prefix);
     if (menu->flashcart_err != FLASHCART_OK) {
         menu->next_mode = MENU_MODE_FAULT;
     }
 
-    menu->error_message = NULL;
+    path_t *path = path_init(menu->storage_prefix, MENU_DIRECTORY);
 
-    directory_create(MENU_DIRECTORY);
+    directory_create(path_get(path));
 
+    path_push(path, MENU_SETTINGS_FILE);
+    settings_init(path_get(path));
     settings_load(&menu->settings);
+    path_pop(path);
 
-    directory_create(CACHE_DIRECTORY);
+    path_push(path, MENU_CUSTOM_FONT_FILE);
+    fonts_init(path_get(path));
+    path_pop(path);
 
-    component_background_init(BACKGROUND_CACHE);
+    path_push(path, MENU_CACHE_DIRECTORY);
+    directory_create(path_get(path));
+
+    path_push(path, BACKGROUND_CACHE_FILE);
+    component_background_init(path_get(path));
+
+    path_free(path);
 
     menu->boot_params = boot_params;
 
-    bool default_directory_exists = directory_exists(menu->settings.default_directory);
+    menu->browser.directory = path_init(menu->storage_prefix, menu->settings.default_directory);
-    char *init_directory = default_directory_exists ? menu->settings.default_directory : "";
+    if (!directory_exists(path_get(menu->browser.directory))) {
-
+        path_free(menu->browser.directory);
-    menu->browser.valid = false;
+        menu->browser.directory = path_init(menu->storage_prefix, "/");
-    menu->browser.reload = false;
+    }
-    menu->browser.directory = path_init("sd:/", init_directory);
-
-    menu->load.rom_path = NULL;
 
     hdmi_clear_game_id();
 
@@ -118,6 +128,12 @@ static void menu_deinit (menu_t *menu) {
 
     hdmi_send_game_id(menu->boot_params);
 
+    path_free(menu->load.disk_path);
+    path_free(menu->load.rom_path);
+    for (int i = 0; i < menu->browser.entries; i++) {
+        free(menu->browser.list[i].name);
+    }
+    free(menu->browser.list);
     path_free(menu->browser.directory);
     free(menu);
 

src/menu/menu_state.h

@@ -19,9 +19,6 @@
 #include "settings.h"
 
 
-#define BROWSER_LIST_SIZE   2048
-
-
 /** @brief Menu mode enumeration */
 typedef enum {
     MENU_MODE_NONE,
@@ -63,7 +60,7 @@ typedef enum {
 typedef struct {
     char *name;
     entry_type_t type;
-    int size;
+    int64_t size;
 } entry_t;
 
 /** @brief Menu Structure */
@@ -71,6 +68,7 @@ typedef struct {
     menu_mode_t mode;
     menu_mode_t next_mode;
 
+    const char *storage_prefix;
     settings_t settings;
     boot_params_t *boot_params;
 
@@ -96,7 +94,7 @@ typedef struct {
         bool valid;
         bool reload;
         path_t *directory;
-        entry_t list[BROWSER_LIST_SIZE];
+        entry_t *list;
         int entries;
         entry_t *entry;
         int selected;

src/menu/mp3_player.c

@@ -1,4 +1,6 @@
-#include <fatfs/ff.h>
+#include <stdio.h>
+#include <sys/stat.h>
+
 #include <libdragon.h>
 
 #include "mp3_player.h"
@@ -18,19 +20,18 @@
 /** @brief MP3 File Information Structure. */
 typedef struct {
     bool loaded;
-    bool io_error;
-
-    FIL fil;
-    FSIZE_t data_start;
-    int seek_predecode_frames;
-
-    mp3dec_t dec;
-    mp3dec_frame_info_t info;
 
+    FILE *f;
+    size_t file_size;
+    size_t data_start;
     uint8_t buffer[16 * 1024];
     uint8_t *buffer_ptr;
     size_t buffer_left;
 
+    mp3dec_t dec;
+    mp3dec_frame_info_t info;
+
+    int seek_predecode_frames;
     float duration;
     float bitrate;
 
@@ -48,9 +49,7 @@ static void mp3player_reset_decoder (void) {
 }
 
 static void mp3player_fill_buffer (void) {
-    UINT bytes_read;
+    if (feof(p->f)) {
-
-    if (f_eof(&p->fil)) {
         return;
     }
 
@@ -63,11 +62,7 @@ static void mp3player_fill_buffer (void) {
         p->buffer_ptr = p->buffer;
     }
 
-    if (f_read(&p->fil, p->buffer + p->buffer_left, sizeof(p->buffer) - p->buffer_left, &bytes_read) == FR_OK) {
+    p->buffer_left += fread(p->buffer + p->buffer_left, 1, sizeof(p->buffer) - p->buffer_left, p->f);
-        p->buffer_left += bytes_read;
-    } else {
-        p->io_error = true;
-    }
 }
 
 static void mp3player_wave_read (void *ctx, samplebuffer_t *sbuf, int wpos, int wlen, bool seeking) {
@@ -109,7 +104,7 @@ static void mp3player_calculate_duration (int samples) {
     uint32_t frames;
     int delay, padding;
 
-    long data_size = (f_size(&p->fil) - p->data_start);
+    long data_size = (p->file_size - p->data_start);
     if (mp3dec_check_vbrtag((const uint8_t *) (p->buffer_ptr), p->info.frame_bytes, &frames, &delay, &padding) > 0) {
         p->duration = (frames * samples) / (float) (p->info.hz);
         p->bitrate = (data_size * 8) / p->duration;
@@ -137,7 +132,6 @@ mp3player_err_t mp3player_init (void) {
     mp3player_reset_decoder();
 
     p->loaded = false;
-    p->io_error = false;
 
     p->wave = (waveform_t) {
         .name = "mp3player",
@@ -164,22 +158,32 @@ mp3player_err_t mp3player_load (char *path) {
         mp3player_unload();
     }
 
-    if (f_open(&p->fil, strip_sd_prefix(path), FA_READ) != FR_OK) {
+    if ((p->f = fopen(path, "rb")) == NULL) {
         return MP3PLAYER_ERR_IO;
     }
+    setbuf(p->f, NULL);
+
+    struct stat st;
+    if (fstat(fileno(p->f), &st)) {
+        fclose(p->f);
+        return MP3PLAYER_ERR_IO;
+    }
+    p->file_size = st.st_size;
 
     mp3player_reset_decoder();
 
-    while (!(f_eof(&p->fil) && p->buffer_left == 0)) {
+    while (!(feof(p->f) && p->buffer_left == 0)) {
         mp3player_fill_buffer();
 
-        if (p->io_error) {
+        if (ferror(p->f)) {
+            fclose(p->f);
             return MP3PLAYER_ERR_IO;
         }
 
         size_t id3v2_skip = mp3dec_skip_id3v2((const uint8_t *) (p->buffer_ptr), p->buffer_left);
         if (id3v2_skip > 0) {
-            if (f_lseek(&p->fil, f_tell(&p->fil) - p->buffer_left + id3v2_skip) != FR_OK) {
+            if (fseek(p->f, (-p->buffer_left) + id3v2_skip, SEEK_CUR)) {
+                fclose(p->f);
                 return MP3PLAYER_ERR_IO;
             }
             mp3player_reset_decoder();
@@ -189,7 +193,7 @@ mp3player_err_t mp3player_load (char *path) {
         int samples = mp3dec_decode_frame(&p->dec, p->buffer_ptr, p->buffer_left, NULL, &p->info);
         if (samples > 0) {
             p->loaded = true;
-            p->data_start = f_tell(&p->fil) - p->buffer_left + p->info.frame_offset;
+            p->data_start = ftell(p->f) - p->buffer_left + p->info.frame_offset;
 
             p->buffer_ptr += p->info.frame_offset;
             p->buffer_left -= p->info.frame_offset;
@@ -206,7 +210,7 @@ mp3player_err_t mp3player_load (char *path) {
         p->buffer_left -= p->info.frame_bytes;
     }
 
-    if (f_close(&p->fil) != FR_OK) {
+    if (fclose(p->f)) {
         return MP3PLAYER_ERR_IO;
     }
 
@@ -217,12 +221,12 @@ void mp3player_unload (void) {
     mp3player_stop();
     if (p->loaded) {
         p->loaded = false;
-        f_close(&p->fil);
+        fclose(p->f);
     }
 }
 
 mp3player_err_t mp3player_process (void) {
-    if (p->io_error) {
+    if (ferror(p->f)) {
         mp3player_unload();
         return MP3PLAYER_ERR_IO;
     }
@@ -239,7 +243,7 @@ bool mp3player_is_playing (void) {
 }
 
 bool mp3player_is_finished (void) {
-    return p->loaded && f_eof(&p->fil) && (p->buffer_left == 0);
+    return p->loaded && feof(p->f) && (p->buffer_left == 0);
 }
 
 mp3player_err_t mp3player_play (void) {
@@ -248,8 +252,7 @@ mp3player_err_t mp3player_play (void) {
     }
     if (!mp3player_is_playing()) {
         if (mp3player_is_finished()) {
-            if (f_lseek(&p->fil, p->data_start) != FR_OK) {
+            if (fseek(p->f, p->data_start, SEEK_SET)) {
-                p->io_error = true;
                 return MP3PLAYER_ERR_IO;
             }
             mp3player_reset_decoder();
@@ -292,25 +295,24 @@ mp3player_err_t mp3player_seek (int seconds) {
         return MP3PLAYER_OK;
     }
 
-    long position = ((long) (f_tell(&p->fil)) - p->buffer_left + bytes_to_move);
+    long position = (ftell(p->f) - p->buffer_left + bytes_to_move);
     if (position < (long) (p->data_start)) {
         position = p->data_start;
     }
 
-    if (f_lseek(&p->fil, position) != FR_OK) {
+    if (fseek(p->f, position, SEEK_SET)) {
-        p->io_error = true;
         return MP3PLAYER_ERR_IO;
     }
 
     mp3player_reset_decoder();
     mp3player_fill_buffer();
 
-    p->seek_predecode_frames = (position == p->data_start) ? 0 : SEEK_PREDECODE_FRAMES;
+    if (ferror(p->f)) {
-
-    if (p->io_error) {
         return MP3PLAYER_ERR_IO;
     }
 
+    p->seek_predecode_frames = (position == p->data_start) ? 0 : SEEK_PREDECODE_FRAMES;
+
     return MP3PLAYER_OK;
 }
 
@@ -346,9 +348,9 @@ float mp3player_get_progress (void) {
         return 0.0f;
     }
 
-    FSIZE_t data_size = f_size(&p->fil) - p->data_start;
+    long data_size = p->file_size - p->data_start;
-    FSIZE_t data_consumed = f_tell(&p->fil) - p->buffer_left;
+    long data_consumed = ftell(p->f) - p->buffer_left;
-    FSIZE_t data_position = (data_consumed > p->data_start) ? (data_consumed - p->data_start) : 0;
+    long data_position = (data_consumed > p->data_start) ? (data_consumed - p->data_start) : 0;
 
     return data_position / (float) (data_size);
 }

src/menu/path.c

@@ -19,7 +19,7 @@ static void path_resize (path_t *path, size_t min_length) {
     assert(path->buffer != NULL);
 }
 
-static path_t *path_create (char *string) {
+static path_t *path_create (const char *string) {
     if (string == NULL) {
         string = "";
     }
@@ -43,7 +43,7 @@ static void path_append (path_t *path, char *string) {
 }
 
 
-path_t *path_init (char *prefix, char *string) {
+path_t *path_init (const char *prefix, char *string) {
     path_t *path = path_create(prefix);
     size_t prefix_length = strlen(prefix);
     if ((prefix_length > 0) && (prefix[prefix_length - 1] == '/')) {

src/menu/path.h

@@ -20,7 +20,7 @@ typedef struct {
 } path_t;
 
 
-path_t *path_init (char *prefix, char *string);
+path_t *path_init (const char *prefix, char *string);
 void path_free (path_t *path);
 path_t *path_clone (path_t *string);
 path_t *path_clone_push (path_t *path, char *string);

src/menu/png_decoder.c

@@ -1,4 +1,5 @@
-#include <fatfs/ff.h>
+#include <stdio.h>
+
 #include <libspng/spng/spng.h>
 
 #include "png_decoder.h"
@@ -7,7 +8,7 @@
 
 /** @brief PNG File Information Structure. */
 typedef struct {
-    FIL fil;
+    FILE *f;
 
     spng_ctx *ctx;
     struct spng_ihdr ihdr;
@@ -25,7 +26,7 @@ static png_decoder_t *decoder;
 
 static void png_decoder_deinit (bool free_image) {
     if (decoder != NULL) {
-        f_close(&decoder->fil);
+        fclose(decoder->f);
         if (decoder->ctx != NULL) {
             spng_ctx_free(decoder->ctx);
         }
@@ -41,21 +42,6 @@ static void png_decoder_deinit (bool free_image) {
     }
 }
 
-static int png_file_read (spng_ctx *ctx, void *user, void *dst_src, size_t length) {
-    UINT bytes_read = 0;
-    png_decoder_t *d = (png_decoder_t *) (user);
-
-    if (f_read(&d->fil, dst_src, length, &bytes_read) != FR_OK) {
-        return SPNG_IO_ERROR;
-    }
-
-    if (bytes_read != length) {
-        return SPNG_EOF;
-    }
-
-    return SPNG_OK;
-}
-
 
 png_err_t png_decoder_start (char *path, int max_width, int max_height, png_callback_t *callback, void *callback_data) {
     if (decoder != NULL) {
@@ -67,11 +53,13 @@ png_err_t png_decoder_start (char *path, int max_width, int max_height, png_call
         return PNG_ERR_OUT_OF_MEM;
     }
 
-    if (f_open(&decoder->fil, strip_sd_prefix(path), FA_READ) != FR_OK) {
+    if ((decoder->f = fopen(path, "rb")) == NULL) {
         png_decoder_deinit(false);
         return PNG_ERR_NO_FILE;
     }
 
+    setbuf(decoder->f, NULL);
+
     if ((decoder->ctx = spng_ctx_new(SPNG_CTX_IGNORE_ADLER32)) == NULL) {
         png_decoder_deinit(false);
         return PNG_ERR_OUT_OF_MEM;
@@ -87,7 +75,7 @@ png_err_t png_decoder_start (char *path, int max_width, int max_height, png_call
         return PNG_ERR_INT;
     }
 
-    if (spng_set_png_stream(decoder->ctx, png_file_read, decoder) != SPNG_OK) {
+    if (spng_set_png_file(decoder->ctx, decoder->f) != SPNG_OK) {
         png_decoder_deinit(false);
         return PNG_ERR_INT;
     }

src/menu/rom_info.c

@@ -1,6 +1,6 @@
+#include <stdio.h>
 #include <string.h>
 
-#include <fatfs/ff.h>
 #include <mini.c/src/mini.h>
 
 #include "boot/cic.h"
@@ -141,16 +141,32 @@ typedef struct {
 
 
 // List shamelessly stolen from https://github.com/ares-emulator/ares/blob/master/mia/medium/nintendo-64.cpp
+
+// clang-format off
 static const match_t database[] = {
     MATCH_HOMEBREW_HEADER("ED"),                                                                            // Homebrew header (ED)
 
     MATCH_CHECK_CODE(0x000000004CBC3B56, SAVE_TYPE_SRAM, FEAT_EXP_PAK_REQUIRED | FEAT_64DD_CONVERSION),     // DMTJ 64DD cartridge conversion
+
     MATCH_CHECK_CODE(0x0DD4ABABB5A2A91E, SAVE_TYPE_EEPROM_16K, FEAT_EXP_PAK_REQUIRED),                      // DK Retail kiosk demo
     MATCH_CHECK_CODE(0xEB85EBC9596682AF, SAVE_TYPE_FLASHRAM, FEAT_NONE),                                    // Doubutsu Banchou
+    MATCH_CHECK_CODE(0x9A746EBF2802EA99, SAVE_TYPE_EEPROM_4K, FEAT_NONE),                                   // Toon panic
+    MATCH_CHECK_CODE(0x21548CA921548CA9, SAVE_TYPE_EEPROM_4K, FEAT_NONE),                                   // Mini racers
+    MATCH_CHECK_CODE(0xBC9B2CC34ED04DA5, SAVE_TYPE_FLASHRAM, FEAT_NONE),                                    // Starcraft 64 [Prototype 2000]
+    MATCH_CHECK_CODE(0x5D40ED2C10D6ABCF, SAVE_TYPE_EEPROM_4K, FEAT_NONE),                                   // Viewpoint 2064
+    MATCH_CHECK_CODE(0x7280E03F497689BA, SAVE_TYPE_EEPROM_4K, FEAT_NONE),                                   // Viewpoint 2064 [ENG patch]
+
+    MATCH_CHECK_CODE(0xCDB8B4D08832352D, SAVE_TYPE_SRAM, FEAT_RPAK),                                        // Jet Force Gemini [USA CRACK]
+    MATCH_CHECK_CODE(0xB66E0F7C2709C22F, SAVE_TYPE_SRAM, FEAT_RPAK),                                        // Jet Force Gemini [PAL CRACK]
+
+    MATCH_CHECK_CODE(0xCE84793D27ECC1AD, SAVE_TYPE_SRAM, FEAT_RPAK | FEAT_EXP_PAK_REQUIRED),                // Donkey kong 64 [USA CRACK]
+    MATCH_CHECK_CODE(0x1F95CAAA047FC22A, SAVE_TYPE_SRAM, FEAT_RPAK | FEAT_EXP_PAK_REQUIRED),                // Donkey kong 64 [PAL CRACK]
+
+    MATCH_CHECK_CODE(0xE3FF09DFCAE4B0ED, SAVE_TYPE_SRAM, FEAT_RPAK),                                        // Banjo tooie [USA CRACK]
 
     MATCH_ID_REGION_VERSION("NK4J", 0, SAVE_TYPE_SRAM, FEAT_RPAK),                                          // Kirby 64: The Crystal Shards [Hoshi no Kirby 64 (J)]
     MATCH_ID_REGION_VERSION("NK4J", 1, SAVE_TYPE_SRAM, FEAT_RPAK),                                          // Kirby 64: The Crystal Shards [Hoshi no Kirby 64 (J)]
-    MATCH_ID("NK4", SAVE_TYPE_EEPROM_16K, FEAT_RPAK),                                                       // Kirby 64: The Crystal Shards [Hoshi no Kirby 64 (J)]
+    MATCH_ID("NK4", SAVE_TYPE_EEPROM_4K, FEAT_RPAK),                                                        // Kirby 64: The Crystal Shards [Hoshi no Kirby 64 (J)]
 
     MATCH_ID_REGION_VERSION("NSMJ", 3, SAVE_TYPE_EEPROM_4K, FEAT_RPAK),                                     // Super Mario 64 Shindou Edition
     MATCH_ID("NSM", SAVE_TYPE_EEPROM_4K, FEAT_NONE),                                                        // Super Mario 64
@@ -175,6 +191,7 @@ static const match_t database[] = {
     MATCH_ID_REGION("NWTJ", SAVE_TYPE_EEPROM_4K, FEAT_NONE),                                                // Wetrix
     MATCH_ID("NWT", SAVE_TYPE_NONE, FEAT_CPAK),                                                             // Wetrix
 
+    // EEPROM 4K
     MATCH_ID("CLB", SAVE_TYPE_EEPROM_4K, FEAT_RPAK | FEAT_64DD_ENHANCED),                                   // Mario Party (NTSC)
     MATCH_ID("NAB", SAVE_TYPE_EEPROM_4K, FEAT_CPAK | FEAT_RPAK),                                            // Air Boarder 64
     MATCH_ID("NAD", SAVE_TYPE_EEPROM_4K, FEAT_NONE),                                                        // Worms Armageddon (U)
@@ -269,6 +286,7 @@ static const match_t database[] = {
     MATCH_ID("NXO", SAVE_TYPE_EEPROM_4K, FEAT_RPAK),                                                        // Cruis'n Exotica
     MATCH_ID("NYK", SAVE_TYPE_EEPROM_4K, FEAT_RPAK),                                                        // Yakouchuu II: Satsujin Kouro
 
+    // EEPROM 16K
     MATCH_ID("N3D", SAVE_TYPE_EEPROM_16K, FEAT_RPAK),                                                       // Doraemon 3: Nobita no Machi SOS!
     MATCH_ID("NB7", SAVE_TYPE_EEPROM_16K, FEAT_RPAK),                                                       // Banjo-Tooie [Banjo to Kazooie no Daiboken 2 (J)]
     MATCH_ID("NCW", SAVE_TYPE_EEPROM_16K, FEAT_RPAK),                                                       // Cruis'n World
@@ -293,12 +311,14 @@ static const match_t database[] = {
     MATCH_ID("NUB", SAVE_TYPE_EEPROM_16K, FEAT_CPAK | FEAT_TPAK),                                           // PD Ultraman Battle Collection 64
     MATCH_ID("NYS", SAVE_TYPE_EEPROM_16K, FEAT_RPAK),                                                       // Yoshi's Story
 
+    // SRAM 256K
     MATCH_ID("CFZ", SAVE_TYPE_SRAM, FEAT_RPAK | FEAT_64DD_ENHANCED),                                        // F-Zero X (J)
     MATCH_ID("CPS", SAVE_TYPE_SRAM, FEAT_TPAK | FEAT_64DD_ENHANCED),                                        // Pocket Monsters Stadium (J)
     MATCH_ID("CZL", SAVE_TYPE_SRAM, FEAT_RPAK | FEAT_64DD_ENHANCED),                                        // Legend of Zelda: Ocarina of Time [Zelda no Densetsu - Toki no Ocarina (J)]
     MATCH_ID("NA2", SAVE_TYPE_SRAM, FEAT_CPAK | FEAT_RPAK),                                                 // Virtual Pro Wrestling 2
     MATCH_ID("NAL", SAVE_TYPE_SRAM, FEAT_RPAK),                                                             // Super Smash Bros. [Nintendo All-Star! Dairantou Smash Brothers (J)]
     MATCH_ID("NB5", SAVE_TYPE_SRAM, FEAT_RPAK),                                                             // Biohazard 2 (J)
+    MATCH_ID("NDD", SAVE_TYPE_SRAM, FEAT_EXP_PAK_REQUIRED | FEAT_64DD_CONVERSION),                          // 64DD Conversion Rom
     MATCH_ID("NFZ", SAVE_TYPE_SRAM, FEAT_RPAK),                                                             // F-Zero X (U + E)
     MATCH_ID("NG6", SAVE_TYPE_SRAM, FEAT_RPAK),                                                             // Ganmare Goemon: Dero Dero Douchuu Obake Tenkomori
     MATCH_ID("NGP", SAVE_TYPE_SRAM, FEAT_CPAK),                                                             // Goemon: Mononoke Sugoroku
@@ -331,11 +351,14 @@ static const match_t database[] = {
     MATCH_ID("NYW", SAVE_TYPE_SRAM, FEAT_NONE),                                                             // Harvest Moon 64
     MATCH_ID("NZL", SAVE_TYPE_SRAM, FEAT_RPAK),                                                             // Legend of Zelda: Ocarina of Time (E)
 
+    // SRAM 768K
     MATCH_ID("CDZ", SAVE_TYPE_SRAM_BANKED, FEAT_RPAK | FEAT_64DD_ENHANCED),                                 // Dezaemon 3D
 
+    // FLASHRAM
     MATCH_ID("CP2", SAVE_TYPE_FLASHRAM, FEAT_TPAK | FEAT_64DD_ENHANCED),                                    // Pocket Monsters Stadium 2 (J)
     MATCH_ID("NAF", SAVE_TYPE_FLASHRAM, FEAT_CPAK | FEAT_RTC),                                              // Doubutsu no Mori
     MATCH_ID("NCC", SAVE_TYPE_FLASHRAM, FEAT_RPAK),                                                         // Command & Conquer
+    MATCH_ID("NCV", SAVE_TYPE_FLASHRAM, FEAT_NONE),                                                         // Cubivore (Translation)
     MATCH_ID("NCK", SAVE_TYPE_FLASHRAM, FEAT_RPAK),                                                         // NBA Courtside 2 featuring Kobe Bryant
     MATCH_ID("NDA", SAVE_TYPE_FLASHRAM, FEAT_CPAK),                                                         // Derby Stallion 64
     MATCH_ID("NDP", SAVE_TYPE_FLASHRAM, FEAT_EXP_PAK_REQUIRED),                                             // Dinosaur Planet (Unlicensed)
@@ -354,6 +377,7 @@ static const match_t database[] = {
 
     MATCH_ID("NP3", SAVE_TYPE_FLASHRAM_PKST2, FEAT_TPAK),                                                   // Pokemon Stadium 2 [Pocket Monsters Stadium - Kin Gin (J)]
 
+    // CONTROLLER PAK / NONE
     MATCH_ID("N22", SAVE_TYPE_NONE, FEAT_CPAK | FEAT_RPAK),                                                 // Ready 2 Rumble Boxing - Round 2
     MATCH_ID("N2M", SAVE_TYPE_NONE, FEAT_CPAK | FEAT_RPAK),                                                 // Madden Football 2002
     MATCH_ID("N32", SAVE_TYPE_NONE, FEAT_CPAK | FEAT_RPAK),                                                 // Army Men - Sarge's Heroes 2
@@ -576,6 +600,7 @@ static const match_t database[] = {
 
     MATCH_END,
 };
+// clang-format on
 
 
 static void fix_rom_header_endianness (rom_header_t *rom_header, rom_info_t *rom_info) {
@@ -829,7 +854,7 @@ static rom_err_t save_override (path_t *path, const char *id, int value, int def
     mini_free(ini);
 
     if (empty) {
-        if (file_delete(path_get(overrides_path))) {
+        if (remove(path_get(overrides_path))) {
             path_free(overrides_path);
             return ROM_ERR_IO;
         }
@@ -912,21 +937,18 @@ rom_err_t rom_info_override_tv_type (path_t *path, rom_info_t *rom_info, rom_tv_
 }
 
 rom_err_t rom_info_load (path_t *path, rom_info_t *rom_info) {
-    FIL fil;
+    FILE *f;
-    UINT br;
     rom_header_t rom_header;
 
-    if (f_open(&fil, strip_sd_prefix(path_get(path)), FA_READ) != FR_OK) {
+    if ((f = fopen(path_get(path), "rb")) == NULL) {
         return ROM_ERR_NO_FILE;
     }
-    if (f_read(&fil, &rom_header, sizeof(rom_header), &br) != FR_OK) {
+    setbuf(f, NULL);
-        f_close(&fil);
+    if (fread(&rom_header, sizeof(rom_header), 1, f) != 1) {
+        fclose(f);
         return ROM_ERR_IO;
     }
-    if (f_close(&fil) != FR_OK) {
+    if (fclose(f)) {
-        return ROM_ERR_IO;
-    }
-    if (br != sizeof(rom_header)) {
         return ROM_ERR_IO;
     }
 

src/menu/settings.c

@@ -5,14 +5,12 @@
 #include "utils/fs.h"
 
 
-#ifndef SETTINGS_FILE_PATH
+static char *settings_path = NULL;
-#define SETTINGS_FILE_PATH  "sd:/menu/config.ini"
-#endif
 
 
 static settings_t init = {
     .pal60_enabled = false,
-    .hidden_files_enabled = false,
+    .show_protected_entries = false,
     .default_directory = "/",
     .use_saves_folder = true,
 
@@ -23,15 +21,22 @@ static settings_t init = {
 };
 
 
+void settings_init (char *path) {
+    if (settings_path) {
+        free(settings_path);
+    }
+    settings_path = strdup(path);
+}
+
 void settings_load (settings_t *settings) {
-    if (!file_exists(SETTINGS_FILE_PATH)) {
+    if (!file_exists(settings_path)) {
         settings_save(&init);
     }
 
-    mini_t *ini = mini_try_load(SETTINGS_FILE_PATH);
+    mini_t *ini = mini_try_load(settings_path);
 
     settings->pal60_enabled = mini_get_bool(ini, "menu", "pal60", init.pal60_enabled); // TODO: consider changing file setting name
-    settings->hidden_files_enabled = mini_get_bool(ini, "menu", "show_hidden_files", init.hidden_files_enabled);
+    settings->show_protected_entries = mini_get_bool(ini, "menu", "show_protected_entries", init.show_protected_entries);
     settings->default_directory = strdup(mini_get_string(ini, "menu", "default_directory", init.default_directory));
     settings->use_saves_folder = mini_get_bool(ini, "menu", "use_saves_folder", init.use_saves_folder);
 
@@ -44,10 +49,10 @@ void settings_load (settings_t *settings) {
 }
 
 void settings_save (settings_t *settings) {
-    mini_t *ini = mini_create(SETTINGS_FILE_PATH);
+    mini_t *ini = mini_create(settings_path);
 
     mini_set_bool(ini, "menu", "pal60", settings->pal60_enabled);
-    mini_set_bool(ini, "menu", "show_hidden_files", settings->hidden_files_enabled);
+    mini_set_bool(ini, "menu", "show_protected_entries", settings->show_protected_entries);
     mini_set_string(ini, "menu", "default_directory", settings->default_directory);
     mini_set_bool(ini, "menu", "use_saves_folder", settings->use_saves_folder);
 

src/menu/settings.h

@@ -13,8 +13,8 @@ typedef struct {
     /** @brief Use 60 Hz refresh rate on a PAL console */
     bool pal60_enabled;
 
-    /** @brief Show files marked as hidden in the browser */
+    /** @brief Show files/directories that are filtered in the browser */
-    bool hidden_files_enabled;
+    bool show_protected_entries;
 
     /** @brief Default directory to navigate to when menu loads */
     char *default_directory;
@@ -33,6 +33,8 @@ typedef struct {
 } settings_t;
 
 
+/** @brief Init settings path */
+void settings_init (char *path);
 /** @brief The settings to load */
 void settings_load (settings_t *settings);
 /** @brief The settings to save */

src/menu/usb_comm.c

@@ -2,8 +2,9 @@
 //       Main use of these functions is to aid menu development
 //       (for example replace files on the SD card or reboot menu).
 
-#include <fatfs/ff.h>
+#include <stdio.h>
 #include <string.h>
+
 #include <usb.h>
 
 #include "usb_comm.h"
@@ -70,18 +71,16 @@ static void command_reboot (menu_t *menu) {
     menu->boot_params->device_type = BOOT_DEVICE_TYPE_ROM;
     menu->boot_params->tv_type = BOOT_TV_TYPE_PASSTHROUGH;
     menu->boot_params->detect_cic_seed = true;
+    menu->boot_params->cheat_list = NULL;
 };
 
 static void command_send_file (menu_t *menu) {
-    char path[256];
+    FILE *f;
+    char buffer[256];
+    uint8_t data[8192];
     char length[8];
 
-    FIL f;
+    if (usb_comm_read_string(buffer, sizeof(buffer), ' ')) {
-    int remaining;
-    uint8_t data[8192];
-    UINT bytes_written;
-
-    if (usb_comm_read_string(path, sizeof(path), ' ')) {
         return usb_comm_send_error("Invalid path argument\n");
     }
 
@@ -93,11 +92,16 @@ static void command_send_file (menu_t *menu) {
         return usb_comm_send_error("Invalid file length argument\n");
     }
 
-    if (f_open(&f, path, FA_CREATE_ALWAYS | FA_WRITE) != FR_OK) {
+    path_t *path = path_init(menu->storage_prefix, buffer);
+
+    if ((f = fopen(path_get(path), "wb")) == NULL) {
+        path_free(path);
         return usb_comm_send_error("Couldn't create file\n");
     }
+    setbuf(f, NULL);
+    path_free(path);
 
-    remaining = atoi(length);
+    int remaining = atoi(length);
 
     if (remaining > MAX_FILE_SIZE) {
         return usb_comm_send_error("File size too big\n");
@@ -106,18 +110,14 @@ static void command_send_file (menu_t *menu) {
     while (remaining > 0) {
         int block_size = MIN(remaining, sizeof(data));
         usb_read(data, block_size);
-        if (f_write(&f, data, block_size, &bytes_written) != FR_OK) {
+        if (fwrite(data, 1, block_size, f) != block_size) {
-            f_close(&f);
+            fclose(f);
-            return usb_comm_send_error("Couldn't write data to the file\n");
-        }
-        if (bytes_written != block_size) {
-            f_close(&f);
             return usb_comm_send_error("Couldn't write all required data to the file\n");
         }
         remaining -= block_size;
     }
 
-    if (f_close(&f) != FR_OK) {
+    if (fclose(f)) {
         return usb_comm_send_error("Couldn't flush data to the file\n");
     }
 

src/menu/views/browser.c

@@ -1,9 +1,8 @@
 #include <stdlib.h>
 #include <string.h>
+#include <sys/errno.h>
 #include <time.h>
 
-#include <fatfs/ff.h>
-
 #include "../fonts.h"
 #include "utils/fs.h"
 #include "views.h"
@@ -13,11 +12,23 @@ static const char *rom_extensions[] = { "z64", "n64", "v64", "rom", NULL };
 static const char *disk_extensions[] = { "ndd", NULL };
 static const char *patch_extensions[] = { "bps", "ips", "aps", "ups", "xdelta", NULL };
 static const char *emulator_extensions[] = { "nes", "sfc", "smc", "gb", "gbc", "sms", "gg", "sg", NULL };
-static const char *save_extensions[] = { "sav", NULL }; // TODO: "eep", "sra", "srm", "fla" could be used if transfered from different flashcarts.
+// TODO: "eep", "sra", "srm", "fla" could be used if transfered from different flashcarts.
+static const char *save_extensions[] = { "sav", NULL };
 static const char *image_extensions[] = { "png", NULL };
 static const char *text_extensions[] = { "txt", "ini", "yml", "yaml", NULL };
 static const char *music_extensions[] = { "mp3", NULL };
 
+static const char *hidden_paths[] = {
+    "/menu.bin",
+    "/menu",
+    "/N64FlashcartMenu.n64",
+    "/OS64.v64",
+    "/OS64P.v64",
+    "/sc64menu.n64",
+    "/System Volume Information",
+    NULL,
+};
+
 
 static int compare_entry (const void *pa, const void *pb) {
     entry_t *a = (entry_t *) (pa);
@@ -66,76 +77,87 @@ static int compare_entry (const void *pa, const void *pb) {
     return strcasecmp((const char *) (a->name), (const char *) (b->name));
 }
 
-static bool load_directory (menu_t *menu) {
+static void browser_list_free (menu_t *menu) {
-    DIR dir;
-    FILINFO info;
-
     for (int i = menu->browser.entries - 1; i >= 0; i--) {
         free(menu->browser.list[i].name);
     }
 
+    free(menu->browser.list);
+
+    menu->browser.list = NULL;
     menu->browser.entries = 0;
-    menu->browser.selected = -1;
     menu->browser.entry = NULL;
+    menu->browser.selected = -1;
+}
 
-    if (f_opendir(&dir, strip_sd_prefix(path_get(menu->browser.directory))) != FR_OK) {
+static bool load_directory (menu_t *menu) {
-        return true;
+    int result;
+    dir_t info;
+
+    browser_list_free(menu);
+
+    path_t *path = path_clone(menu->browser.directory);
+
+    result = dir_findfirst(path_get(path), &info);
+
+    while (result == 0) {
+        bool hide = false;
+
+        if (!menu->settings.show_protected_entries) {
+            path_push(path, info.d_name);
+
+            for (int i = 0; hidden_paths[i] != NULL; i++) {
+                if (strcmp(strip_fs_prefix(path_get(path)), hidden_paths[i]) == 0) {
+                    hide = true;
+                    break;
+                }
+            }
+
+            path_pop(path);
+        }
+
+        if (!hide) {
+            menu->browser.list = realloc(menu->browser.list, (menu->browser.entries + 1) * sizeof(entry_t));
+
+            entry_t *entry = &menu->browser.list[menu->browser.entries++];
+
+            entry->name = strdup(info.d_name);
+            if (!entry->name) {
+                path_free(path);
+                browser_list_free(menu);
+                return true;
+            }
+
+            if (info.d_type == DT_DIR) {
+                entry->type = ENTRY_TYPE_DIR;
+            } else if (file_has_extensions(entry->name, rom_extensions)) {
+                entry->type = ENTRY_TYPE_ROM;
+            } else if (file_has_extensions(entry->name, disk_extensions)) {
+                entry->type = ENTRY_TYPE_DISK;
+            }else if (file_has_extensions(entry->name, emulator_extensions)) {
+                entry->type = ENTRY_TYPE_EMULATOR;
+            } else if (file_has_extensions(entry->name, save_extensions)) {
+                entry->type = ENTRY_TYPE_SAVE;
+            } else if (file_has_extensions(entry->name, image_extensions)) {
+                entry->type = ENTRY_TYPE_IMAGE;
+            } else if (file_has_extensions(entry->name, text_extensions)) {
+                entry->type = ENTRY_TYPE_TEXT;
+            } else if (file_has_extensions(entry->name, music_extensions)) {
+                entry->type = ENTRY_TYPE_MUSIC;
+            } else {
+                entry->type = ENTRY_TYPE_OTHER;
+            }
+
+            entry->size = info.d_size;
+        }
+
+        result = dir_findnext(path_get(path), &info);
     }
 
-    while (menu->browser.entries < BROWSER_LIST_SIZE) {
+    path_free(path);
-        if (f_readdir(&dir, &info) != FR_OK) {
-            return true;
-        }
 
-        size_t length = strlen(info.fname);
+    if (result < -1) {
-
+        browser_list_free(menu);
-        if (length == 0) {
-            break;
-        }
-
-        if (info.fattrib & AM_SYS) {
-            continue;
-        }
-        if ((info.fattrib & AM_HID) && !menu->settings.hidden_files_enabled) {
-            continue;
-        }
-
-        entry_t *entry = &menu->browser.list[menu->browser.entries];
-
-        entry->name = strdup(info.fname);
-        if (!entry->name) {
-            f_closedir(&dir);
-            return true;
-        }
-
-        if (info.fattrib & AM_DIR) {
-            entry->type = ENTRY_TYPE_DIR;
-        } else if (file_has_extensions(info.fname, rom_extensions)) {
-            entry->type = ENTRY_TYPE_ROM;
-        } else if (file_has_extensions(info.fname, disk_extensions)) {
-            entry->type = ENTRY_TYPE_DISK;
-        } else if (file_has_extensions(info.fname, patch_extensions)) {
-            entry->type = ENTRY_TYPE_ROM_PATCH;
-        }else if (file_has_extensions(info.fname, emulator_extensions)) {
-            entry->type = ENTRY_TYPE_EMULATOR;
-        } else if (file_has_extensions(info.fname, save_extensions)) {
-            entry->type = ENTRY_TYPE_SAVE;
-        } else if (file_has_extensions(info.fname, image_extensions)) {
-            entry->type = ENTRY_TYPE_IMAGE;
-        } else if (file_has_extensions(info.fname, text_extensions)) {
-            entry->type = ENTRY_TYPE_TEXT;
-        } else if (file_has_extensions(info.fname, music_extensions)) {
-            entry->type = ENTRY_TYPE_MUSIC;
-        } else {
-            entry->type = ENTRY_TYPE_OTHER;
-        }
-
-        entry->size = info.fsize;
-
-        menu->browser.entries += 1;
-    }
-
-    if (f_closedir(&dir) != FR_OK) {
         return true;
     }
 
@@ -212,18 +234,15 @@ static void show_properties (menu_t *menu, void *arg) {
 static void delete_entry (menu_t *menu, void *arg) {
     path_t *path = path_clone_push(menu->browser.directory, menu->browser.entry->name);
 
-    if (menu->browser.entry->type == ENTRY_TYPE_DIR) {
+    if (remove(path_get(path))) {
-        if (directory_delete(path_get(path))) {
+        menu->browser.valid = false;
+        if (menu->browser.entry->type == ENTRY_TYPE_DIR) {
             menu_show_error(menu, "Couldn't delete directory\nDirectory might not be empty");
-            path_free(path);
+        } else {
-            return;
-        }
-    } else {
-        if (file_delete(path_get(path))) {
             menu_show_error(menu, "Couldn't delete file");
-            path_free(path);
-            return;
         }
+        path_free(path);
+        return;
     }
 
     path_free(path);
@@ -236,7 +255,7 @@ static void delete_entry (menu_t *menu, void *arg) {
 
 static void set_default_directory (menu_t *menu, void *arg) {
     free(menu->settings.default_directory);
-    menu->settings.default_directory = strdup(strip_sd_prefix(path_get(menu->browser.directory)));
+    menu->settings.default_directory = strdup(strip_fs_prefix(path_get(menu->browser.directory)));
     settings_save(&menu->settings);
 }
 
@@ -399,7 +418,7 @@ void view_browser_init (menu_t *menu) {
         component_context_menu_init(&settings_context_menu);
         if (load_directory(menu)) {
             path_free(menu->browser.directory);
-            menu->browser.directory = path_init("sd:/", "");
+            menu->browser.directory = path_init(menu->storage_prefix, "");
             menu_show_error(menu, "Error while opening initial directory");
         } else {
             menu->browser.valid = true;

src/menu/views/error.c

@@ -50,5 +50,4 @@ void view_error_display (menu_t *menu, surface_t *display) {
 void menu_show_error (menu_t *menu, char *error_message) {
     menu->next_mode = MENU_MODE_ERROR;
     menu->error_message = error_message;
-    menu->browser.valid = false;
 }

src/menu/views/file_info.c

@@ -1,4 +1,4 @@
-#include <fatfs/ff.h>
+#include <sys/stat.h>
 
 #include "utils/fs.h"
 #include "views.h"
@@ -8,7 +8,7 @@ static const char *n64_rom_extensions[] = { "z64", "n64", "v64", "rom", NULL };
 static const char *text_extensions[] = { "txt", NULL };
 static const char *config_extensions[] = { "ini", "cfg", "yml", "yaml", "toml", NULL };
 static const char *save_extensions[] = { "sav", "eep", "eeprom", "sra", "srm", "ram", "fla", "flashram", NULL };
-static const char *patch_extensions[] = { "ips", "aps", "pps", "xdelta", NULL };
+static const char *patch_extensions[] = { "aps", "bps", "ips", "pps", "ups", "xdelta", NULL };
 static const char *archive_extensions[] = { "zip", "rar", "7z", "tar", "gz", NULL };
 static const char *image_extensions[] = { "png", "jpg", "gif", NULL };
 static const char *music_extensions[] = { "mp3", "wav", "ogg", "wma", "flac", NULL };
@@ -16,7 +16,7 @@ static const char *dexdrive_extensions[] = { "mpk", NULL };
 static const char *emulator_extensions[] = { "emu", NULL };
 
 
-static FILINFO info;
+static struct stat st;
 
 
 static char *format_file_type (char *name, bool is_directory) {
@@ -75,17 +75,14 @@ static void draw (menu_t *menu, surface_t *d) {
         "\n"
         "\n"
         " Size: %d bytes\n"
-        " Attributes: %s%s%s%s%s\n"
+        " Attributes: %s %s\n"
         "%s"
-        " Modified: %u-%02u-%02u %02u:%02u",
+        " Modified: %s",
-        info.fsize,
+        st.st_size,
-        (info.fattrib & AM_DIR) ? "Directory " : "File ",
+        S_ISDIR(st.st_mode) ? "Directory" : "File",
-        (info.fattrib & AM_RDO) ? "| Read only " : "",
+        st.st_mode & S_IWUSR ? "" : "(Read only)",
-        (info.fattrib & AM_SYS) ? "| System " : "",
+        format_file_type(menu->browser.entry->name, S_ISDIR(st.st_mode)),
-        (info.fattrib & AM_ARC) ? "| Archive " : "",
+        ctime(&st.st_mtim.tv_sec)
-        (info.fattrib & AM_HID) ? "| Hidden " : "",
-        format_file_type(info.fname, info.fattrib & AM_DIR),
-        (info.fdate >> 9) + 1980, info.fdate >> 5 & 0x0F, info.fdate & 0x1F, info.ftime >> 11, info.ftime >> 5 & 0x3F
     );
 
     component_actions_bar_text_draw(
@@ -101,7 +98,7 @@ static void draw (menu_t *menu, surface_t *d) {
 void view_file_info_init (menu_t *menu) {
     path_t *path = path_clone_push(menu->browser.directory, menu->browser.entry->name);
 
-    if (f_stat(strip_sd_prefix(path_get(path)), &info) != FR_OK) {
+    if (stat(path_get(path), &st)) {
         menu_show_error(menu, "Couldn't obtain file information");
     }
 

src/menu/views/load_disk.c

@@ -136,10 +136,12 @@ static void load (menu_t *menu) {
             case ROM_TV_TYPE_MPAL: menu->boot_params->tv_type = BOOT_TV_TYPE_MPAL; break;
             default: menu->boot_params->tv_type = BOOT_TV_TYPE_PASSTHROUGH; break;
         }
+        menu->boot_params->cheat_list = NULL;
     } else {
         menu->boot_params->device_type = BOOT_DEVICE_TYPE_64DD;
         menu->boot_params->tv_type = BOOT_TV_TYPE_NTSC;
         menu->boot_params->detect_cic_seed = true;
+        menu->boot_params->cheat_list = NULL;
     }
 }
 
@@ -154,7 +156,7 @@ void view_load_disk_init (menu_t *menu) {
 
     menu->load.disk_path = path_clone_push(menu->browser.directory, menu->browser.entry->name);
 
-    disk_err_t err = disk_info_load(path_get(menu->load.disk_path), &menu->load.disk_info);
+    disk_err_t err = disk_info_load(menu->load.disk_path, &menu->load.disk_info);
     if (err != DISK_OK) {
         menu_show_error(menu, convert_error_message(err));
     }

src/menu/views/load_emulator.c

@@ -100,6 +100,7 @@ static void load (menu_t *menu) {
     menu->boot_params->device_type = BOOT_DEVICE_TYPE_ROM;
     menu->boot_params->tv_type = BOOT_TV_TYPE_PASSTHROUGH;
     menu->boot_params->detect_cic_seed = true;
+    menu->boot_params->cheat_list = NULL;
 }
 
 

src/menu/views/load_rom.c

@@ -310,6 +310,7 @@ static void load (menu_t *menu) {
         case ROM_TV_TYPE_MPAL: menu->boot_params->tv_type = BOOT_TV_TYPE_MPAL; break;
         default: menu->boot_params->tv_type = BOOT_TV_TYPE_PASSTHROUGH; break;
     }
+    menu->boot_params->cheat_list = NULL;
 }
 
 static void deinit (void) {
@@ -334,7 +335,7 @@ void view_load_rom_init (menu_t *menu) {
         return;
     }
 
-    boxart = component_boxart_init(menu->load.rom_info.game_code);
+    boxart = component_boxart_init(menu->storage_prefix, menu->load.rom_info.game_code);
 
     component_context_menu_init(&options_context_menu);
 }

src/menu/views/settings_editor.c

@@ -34,15 +34,15 @@ static void draw (menu_t *menu, surface_t *d) {
         "\n"
         "To change the settings, please adjust them\n"
         "directly in the 'menu/config.ini' file.\n\n"
-        "pal60_enabled:         %s\n"
+        "pal60_enabled:          %s\n"
-        "hidden_files_enabled:  %s\n"
+        "show_protected_entries: %s\n"
-        "default_directory:     %s\n"
+        "default_directory:      %s\n"
-        "use_saves_folder:      %s\n"
+        "use_saves_folder:       %s\n"
-        "bgm_enabled:           %s\n"
+        "bgm_enabled:            %s\n"
-        "sound_enabled:         %s\n"
+        "sound_enabled:          %s\n"
-        "rumble_enabled:        %s\n",
+        "rumble_enabled:         %s\n",
         format_switch(menu->settings.pal60_enabled),
-        format_switch(menu->settings.hidden_files_enabled),
+        format_switch(menu->settings.show_protected_entries),
         menu->settings.default_directory,
         format_switch(menu->settings.use_saves_folder),
         format_switch(menu->settings.bgm_enabled),

src/menu/views/text_viewer.c

@@ -1,13 +1,66 @@
-#include <fatfs/ff.h>
+#include <stdio.h>
+#include <sys/stat.h>
 
-#include "utils/fs.h"
+#include "../components/constants.h"
+#include "../fonts.h"
+#include "utils/utils.h"
 #include "views.h"
 
-static char *file_content;
+
+#define MAX_FILE_SIZE KiB(128)
+
+
+typedef struct {
+    FILE *f;
+    char *contents;
+    size_t length;
+    int lines;
+    int current_line;
+    int offset;
+    bool vertical_scroll_possible;
+} text_file_t;
+
+static text_file_t *text;
+
+
+static void perform_vertical_scroll (int lines) {
+    if (!text->vertical_scroll_possible) {
+        return;
+    }
+
+    int direction = (lines < 0) ? -1 : 1;
+    int next_offset = text->offset;
+
+    for (int i = 0; i < abs(lines); i++) {
+        while (true) {
+            next_offset += direction;
+            if (next_offset <= 0) {
+                text->current_line = 0;
+                text->offset = 0;
+                return;
+            }
+            if (next_offset > text->length) {
+                return;
+            }
+            if (text->contents[next_offset - 1] == '\n') {
+                break;
+            }
+        }
+        text->current_line += direction;
+        text->offset = next_offset;
+    }
+}
+
 
 static void process (menu_t *menu) {
     if (menu->actions.back) {
         menu->next_mode = MENU_MODE_BROWSER;
+    } else if (text) {
+        if (menu->actions.go_up) {
+            perform_vertical_scroll(menu->actions.go_fast ? -10 : -1);
+        } else if (menu->actions.go_down) {
+            perform_vertical_scroll(menu->actions.go_fast ? 10 : 1);
+        }
     }
 }
 
@@ -18,61 +71,102 @@ static void draw (menu_t *menu, surface_t *d) {
 
     component_layout_draw();
 
-	component_main_text_draw(
-        ALIGN_CENTER, VALIGN_TOP,
-        "TEXT VIEWER\n"
-        "\n"
-    );
-
     component_main_text_draw(
         ALIGN_LEFT, VALIGN_TOP,
-        "\n"
-        "\n"
         "%s\n",
-        file_content
+        text->contents + text->offset
     );
 
+    component_list_scrollbar_draw(text->current_line, text->lines, LIST_ENTRIES);
 
     component_actions_bar_text_draw(
         ALIGN_LEFT, VALIGN_TOP,
-        "\n"
+        "^%02XUp / Down: Scroll^00\n"
-        "B: Back"
+        "B: Back",
+        text->vertical_scroll_possible ? STL_DEFAULT : STL_GRAY
     );
 
     rdpq_detach_show();
 }
 
+static void deinit (void) {
+    if (text) {
+        if (text->f) {
+            fclose(text->f);
+        }
+        if (text->contents) {
+            free(text->contents);
+        }
+        free(text);
+        text = NULL;
+    }
+}
+
 
 void view_text_viewer_init (menu_t *menu) {
+    if ((text = calloc(1, sizeof(text_file_t))) == NULL) {
+        return menu_show_error(menu, "Couldn't allocate memory for the text file");
+    }
+
     path_t *path = path_clone_push(menu->browser.directory, menu->browser.entry->name);
-
+    text->f = fopen(path_get(path), "r");
-    uint32_t file_size = file_get_size(path_get(path));
-
-    if (file_size > 1024) { // FIXME: this is just a placeholder until scrolling is implemented.
-        file_size = 1024; // For the moment, we just set it to that, since any more would be a waste.
-    }
-
-    file_content = calloc(file_size, 1);
-
-    // read file content
-    FIL fil;
-    UINT br;
-
-    if (f_open(&fil, strip_sd_prefix(path_get(path)), FA_READ) != FR_OK) {
-        debugf("Error loading file\n");
-    }
-    if (f_read(&fil, file_content, file_size, &br) != FR_OK) {
-        f_close(&fil);
-        debugf("Error loading file content\n");
-    }
-    if (f_close(&fil) != FR_OK) {
-        debugf("Error closing file\n");
-    }
-
     path_free(path);
+
+    if (text->f == NULL) {
+        deinit();
+        return menu_show_error(menu, "Couldn't open text file");
+    }
+
+    struct stat st;
+    if (fstat(fileno(text->f), &st)) {
+        deinit();
+        return menu_show_error(menu, "Couldn't get text file size");
+    }
+    text->length = st.st_size;
+
+    if (text->length <= 0) {
+        deinit();
+        return menu_show_error(menu, "Text file is empty");
+    }
+
+    if (text->length > MAX_FILE_SIZE) {
+        deinit();
+        return menu_show_error(menu, "Text file is too big to be displayed");
+    }
+
+    if ((text->contents = malloc((text->length + 1) * sizeof(char))) == NULL) {
+        deinit();
+        return menu_show_error(menu, "Couldn't allocate memory for the text file contents");
+    }
+
+    if (fread(text->contents, text->length, 1, text->f) != 1) {
+        deinit();
+        return menu_show_error(menu, "Couldn't read text file contents");
+    }
+    text->contents[text->length] = '\0';
+
+    if (fclose(text->f)) {
+        deinit();
+        return menu_show_error(menu, "Couldn't close text file");
+    }
+    text->f = NULL;
+
+    text->lines = 1;
+    for (size_t i = 0; i < text->length; i++) {
+        if (text->contents[i] == '\n') {
+            text->lines += 1;
+        }
+    }
+
+    text->vertical_scroll_possible = (text->lines > LIST_ENTRIES);
 }
 
 void view_text_viewer_display (menu_t *menu, surface_t *display) {
     process(menu);
+
     draw(menu, display);
+
+    if (menu->next_mode != MENU_MODE_TEXT_VIEWER) {
+        deinit();
+    }
 }

src/utils/fs.c

@@ -1,145 +1,85 @@
+#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <strings.h>
+#include <sys/errno.h>
-
+#include <sys/stat.h>
-#include <fatfs/ff.h>
 
 #include "fs.h"
 #include "utils.h"
 
 
-char *strip_sd_prefix (char *path) {
+char *strip_fs_prefix (char *path) {
-    const char *prefix = "sd:/";
+    const char *prefix = ":/";
-
     char *found = strstr(path, prefix);
     if (found) {
-        return found + strlen(prefix) - 1;
+        return (found + strlen(prefix) - 1);
     }
-
     return path;
 }
 
 
 bool file_exists (char *path) {
-    FRESULT fr;
+    struct stat st;
-    FILINFO fno;
+    int error = stat(path, &st);
-
+    return ((error == 0) && S_ISREG(st.st_mode));
-    fr = f_stat(strip_sd_prefix(path), &fno);
-
-    return ((fr == FR_OK) && (!(fno.fattrib & AM_DIR)));
 }
 
-
+int64_t file_get_size (char *path) {
-size_t file_get_size (char *path) {
+    struct stat st;
-    FILINFO fno;
+    if (stat(path, &st)) {
-
+        return -1;
-    if (f_stat(strip_sd_prefix(path), &fno) != FR_OK) {
-        return 0;
     }
-
+    return (int64_t) (st.st_size);
-    return (size_t) (fno.fsize);
 }
 
-bool file_delete (char *path) {
+bool file_allocate (char *path, size_t size) {
-    if (file_exists(path)) {
+    FILE *f;
-        return (f_unlink(strip_sd_prefix(path)) != FR_OK);
+    if ((f = fopen(path, "wb")) == NULL) {
+        return true;
+    }
+    if (fseek(f, size, SEEK_SET)) {
+        fclose(f);
+        return true;
+    }
+    if (ftell(f) != size) {
+        fclose(f);
+        return true;
+    }
+    if (fclose(f)) {
+        return true;
     }
     return false;
 }
 
-bool file_allocate (char *path, size_t size) {
-    FIL fil;
-    bool error = false;
-
-    if (f_open(&fil, strip_sd_prefix(path), FA_WRITE | FA_CREATE_NEW) != FR_OK) {
-        return true;
-    }
-
-    if (f_lseek(&fil, size) != FR_OK) {
-        error = true;
-    }
-
-    if (f_tell(&fil) != size) {
-        error = true;
-    }
-
-    if (f_close(&fil) != FR_OK) {
-        error = true;
-    }
-
-    return error;
-}
-
 bool file_fill (char *path, uint8_t value) {
-    FIL fil;
+    FILE *f;
     bool error = false;
     uint8_t buffer[FS_SECTOR_SIZE * 8];
-    FRESULT res;
+    size_t bytes_to_write;
-    UINT bytes_to_write;
-    UINT bytes_written;
 
     for (int i = 0; i < sizeof(buffer); i++) {
         buffer[i] = value;
     }
 
-    if (f_open(&fil, strip_sd_prefix(path), FA_WRITE) != FR_OK) {
+    if ((f = fopen(path, "rb+")) == NULL) {
         return true;
     }
 
-    for (int i = 0; i < f_size(&fil); i += sizeof(buffer)) {
+    setbuf(f, NULL);
-        bytes_to_write = MIN(f_size(&fil) - f_tell(&fil), sizeof(buffer));
+
-        res = f_write(&fil, buffer, bytes_to_write, &bytes_written);
+    fseek(f, 0, SEEK_END);
-        if ((res != FR_OK) || (bytes_to_write != bytes_written)) {
+    size_t size = ftell(f);
+    fseek(f, 0, SEEK_SET);
+
+    for (size_t i = 0; i < size; i += sizeof(buffer)) {
+        bytes_to_write = MIN(size - ftell(f), sizeof(buffer));
+        if (fwrite(buffer, 1, bytes_to_write, f) != bytes_to_write) {
             error = true;
             break;
         }
     }
 
-    if (f_tell(&fil) != f_size(&fil)) {
+    if (fclose(f)) {
-        error = true;
-    }
-
-    if (f_close(&fil) != FR_OK) {
-        error = true;
-    }
-
-    return error;
-}
-
-bool file_get_sectors (char *path, void (*callback) (uint32_t sector_count, uint32_t file_sector, uint32_t cluster_sector, uint32_t cluster_size)) {
-    FATFS *fs;
-    FIL fil;
-    bool error = false;
-
-    if (!callback) {
-        return true;
-    }
-
-    if (f_open(&fil, strip_sd_prefix(path), FA_READ) != FR_OK) {
-        return true;
-    }
-
-    fs = fil.obj.fs;
-
-    uint32_t sector_count = (ALIGN(f_size(&fil), FS_SECTOR_SIZE) / FS_SECTOR_SIZE);
-
-    uint32_t cluster_sector = 0;
-
-    for (int file_sector = 0; file_sector < sector_count; file_sector += fs->csize) {
-        if ((f_lseek(&fil, (file_sector * FS_SECTOR_SIZE) + (FS_SECTOR_SIZE / 2))) != FR_OK) {
-            error = true;
-            break;
-        }
-        uint32_t cluster = fil.clust;
-        if (cluster >= fs->n_fatent) {
-            error = true;
-            break;
-        }
-        cluster_sector = (fs->database + ((LBA_t) (fs->csize) * (cluster - 2)));
-        callback(sector_count, file_sector, cluster_sector, fs->csize);
-    }
-
-    if (f_close(&fil) != FR_OK) {
         error = true;
     }
 
@@ -165,20 +105,9 @@ bool file_has_extensions (char *path, const char *extensions[]) {
 
 
 bool directory_exists (char *path) {
-    FRESULT fr;
+    struct stat st;
-    FILINFO fno;
+    int error = stat(path, &st);
-
+    return ((error == 0) && S_ISDIR(st.st_mode));
-    fr = f_stat(strip_sd_prefix(path), &fno);
-
-    return ((fr == FR_OK) && (fno.fattrib & AM_DIR));
-}
-
-bool directory_delete (char *path) {
-    if (directory_exists(path)) {
-        return (f_unlink(strip_sd_prefix(path)) != FR_OK);
-    }
-
-    return false;
 }
 
 bool directory_create (char *path) {
@@ -188,8 +117,12 @@ bool directory_create (char *path) {
         return false;
     }
 
-    char *directory = strdup(strip_sd_prefix(path));
+    char *directory = strdup(path);
-    char *separator = directory;
+    char *separator = strip_fs_prefix(directory);
+
+    if (separator != directory) {
+        separator++;
+    }
 
     do {
         separator = strchr(separator, '/');
@@ -199,8 +132,7 @@ bool directory_create (char *path) {
         }
 
         if (directory[0] != '\0') {
-            FRESULT res = f_mkdir(directory);
+            if (mkdir(directory, 0777) && (errno != EEXIST)) {
-            if ((res != FR_OK) && (res != FR_EXIST)) {
                 error = true;
                 break;
             }

src/utils/fs.h

@@ -10,18 +10,15 @@
 #define FS_SECTOR_SIZE      (512)
 
 
-char *strip_sd_prefix (char *path);
+char *strip_fs_prefix (char *path);
 
 bool file_exists (char *path);
-size_t file_get_size (char *path);
+int64_t file_get_size (char *path);
-bool file_delete (char *path);
 bool file_allocate (char *path, size_t size);
 bool file_fill (char *path, uint8_t value);
-bool file_get_sectors (char *path, void (*callback) (uint32_t sector_count, uint32_t file_sector, uint32_t cluster_sector, uint32_t cluster_size));
 bool file_has_extensions (char *path, const char *extensions[]);
 
 bool directory_exists (char *path);
-bool directory_delete (char *path);
 bool directory_create (char *path);