Add Expansion PAK information (#11)

<!--- Provide a general summary of your changes in the Title above -->

## Description
<!--- Describe your changes in detail -->
Adds Expansion PAK information to the menu

## Motivation and Context
<!--- What does this sample do? What problem does it solve? -->
<!--- If it fixes/closes/resolves an open issue, please link to the
issue here -->
This is required by some ROM's and could cause a black screen upon boot.
In future, this can be checked against to warn users.

## How Has This Been Tested?
<!-- (if applicable) -->
<!--- Please describe in detail how you tested your sample/changes. -->
<!--- Include details of your testing environment, and the tests you ran
to -->
<!--- see how your change affects other areas of the code, etc. -->

## Screenshots
<!-- (if appropriate): -->

## Types of changes
<!--- What types of changes does your code introduce? Put an `x` in all
the boxes that apply: -->
- [x] Improvement (non-breaking change that adds a new feature)
- [ ] Bug fix (fixes an issue)
- [ ] Breaking change (breaking change)
- [ ] Config and build (change in the configuration and build system,
has no impact on code or features)

## Checklist:
<!--- Go over all the following points, and put an `x` in all the boxes
that apply. -->
<!--- If you're unsure about any of these, don't hesitate to ask. We're
here to help! -->
- [x] My code follows the code style of this project.
- [ ] My change requires a change to the documentation.
- [ ] I have updated the documentation accordingly.
- [ ] I have added tests to cover my changes.
- [ ] All new and existing tests passed.

<!--- It would be nice if you could sign off your contribution by
replacing the name with your GitHub user name and GitHub email contact.
-->
Signed-off-by: GITHUB_USER <GITHUB_USER_EMAIL>

src/menu/rom_database.c

@@ -168,3 +168,52 @@ uint8_t rom_db_match_save_type(rom_header_t rom_header) {
 
     return DB_SAVE_TYPE_NONE; //Nothing matched.
 }
+
+uint8_t rom_db_match_expansion_pak(rom_header_t rom_header) {
+
+    static char *cart_ids[] = {
+
+        // Expansion Pak Required
+        "DO", "DP", "ZS", // Donkey Kong, Dino Planet, Majoras Mask
+
+        // Expansion Pak Suggested
+         "IJ", "PD", "SQ", // Indiana Jones, Perfect Dark, Starcraft
+
+        // Expansion Pak Enhanced
+        "32", "F2", "MX", "NA", "Q2", "RE", "SD", "P3", "Y2", "TQ", // F-1 World Grand Prix II, Shadow Man, Excitebike 64, Rogue Squadron, Battle for Naboo, Quake 2, Resident Evil 2, etc.
+
+        // Expansion Pak Known Faulty ( NTSC only )
+        "SV",
+
+        // Last entry
+        "!!"
+
+    };
+    static int exp_types[] = {
+
+        // Expansion Pak Required
+        0x01, 0x01, 0x01,
+
+        // Expansion Pak Suggested
+        0x02, 0x02, 0x02,
+
+        // Expansion Pak Enhanced
+        0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03,
+
+        // Expansion Pak Known Faulty ( NTSC only )
+        0x04,
+
+        // Last entry.
+        0xff
+    };
+
+    for (int i = 0; exp_types[i] != 0xff; i++) {
+
+        if (rom_header.metadata.unique_identifier == *(uint16_t *) cart_ids[i]) {
+            return exp_types[i];
+        }
+
+    }
+
+    return DB_MEMORY_EXPANSION_NONE;
+}

src/menu/rom_database.h

@@ -16,6 +16,15 @@
 #define DB_SAVE_TYPE_DD             0x20
 #define DB_SAVE_TYPE_INVALID        0xff
 
+typedef enum {
+    DB_MEMORY_EXPANSION_NONE =      0x00,
+    DB_MEMORY_EXPANSION_REQUIRED =  0x01,
+    DB_MEMORY_EXPANSION_SUGGESTED = 0x02,
+    DB_MEMORY_EXPANSION_ENHANCED =  0x03,
+    DB_MEMORY_EXPANSION_FAULTY =    0x04,
+} rom_memorytype_t;
+
+
 typedef enum {
     HB_SAVE_TYPE_NONE =         0x00,
     HB_SAVE_TYPE_EEPROM_4K =    0x01,
@@ -27,10 +36,11 @@ typedef enum {
 } homebrew_savetype_t;
 
 typedef enum {
-    ROM_BIG_ENDIAN = 2151092800U,
+    ROM_BIG_ENDIAN =        0x80371240,
-    ROM_LITTLE_ENDIAN = 1074935680U,
+    ROM_LITTLE_ENDIAN =     0x40123780,
-    ROM_MID_BIG_ENDIAN = 931151890U,
+    ROM_MID_BIG_ENDIAN =    0x37804012,
-    ROM_MID_LITTLE_ENDIAN = 306217015U
+    ROM_MID_LITTLE_ENDIAN = 0x12408037,
+    IPL_BIG_ENDIAN =        0x80270740,
 } rom_endian_type_t;
 
 //Rom Info
@@ -96,5 +106,6 @@ typedef struct {
 
 rom_header_t file_read_rom_header(char *path);
 uint8_t rom_db_match_save_type(rom_header_t rom_header);
+uint8_t rom_db_match_expansion_pak(rom_header_t rom_header);
 
 #endif

src/menu/views/file_info.c

@@ -14,6 +14,7 @@ static char *get_rom_endian_s (uint32_t endian) {
     switch (endian)
     {
     case ROM_BIG_ENDIAN:
+    case IPL_BIG_ENDIAN:
         return "Big (default)"; // expected
         break;
     case ROM_LITTLE_ENDIAN:
@@ -85,6 +86,27 @@ static char *get_rom_savetype_s (uint8_t type) {
     }
 }
 
+static char *get_rom_memorytype_s (uint8_t type) {
+    switch (type)
+    {
+    case DB_MEMORY_EXPANSION_REQUIRED:
+        return "Required";
+        break;
+    case DB_MEMORY_EXPANSION_SUGGESTED:
+        return "Suggested";
+        break;
+    case DB_MEMORY_EXPANSION_ENHANCED:
+        return "Enhanced";
+        break;
+    case DB_MEMORY_EXPANSION_FAULTY:
+        return "May have issues";
+        break;
+    default:
+        return "Not Required";
+        break;
+    }
+}
+
 static char *get_file_type_s (void) {
     // TODO: should be at least a switch statement!
     if (str_endswith(info.fname, ".z64", false) ||
@@ -212,7 +234,10 @@ static void draw (menu_t *menu, surface_t *d) {
         uint8_t save_type = rom_db_match_save_type(temp_header);
         sprintf(str_buffer,"Save Type: %s\n", get_rom_savetype_s(save_type));
         graphics_draw_text(d, x_start_position, y_position += font_vertical_pixels, str_buffer);
-
+        y_position += (font_vertical_pixels * 2);
+        uint8_t memory_type = rom_db_match_expansion_pak(temp_header);
+        sprintf(str_buffer,"Expansion PAK: %s\n", get_rom_memorytype_s(memory_type));
+        graphics_draw_text(d, x_start_position, y_position += font_vertical_pixels, str_buffer);
         //menu_fileinfo_draw_n64_rom_info(d);
     }
 

src/menu/views/load.c

@@ -14,6 +14,7 @@ static rom_header_t rom_header;
 static char *format_rom_endian (uint32_t endian) {
     switch (endian) {
         case ROM_BIG_ENDIAN:
+        case IPL_BIG_ENDIAN:
             return "Big (native)";
         case ROM_LITTLE_ENDIAN:
             return "Little (unsupported)";
@@ -31,9 +32,9 @@ static char *format_rom_media_type (uint8_t media_type) {
         case N64_DISK:
             return "D - Disk";
         case N64_CART_EXPANDABLE:
-            return "C - Cart Expandable";
+            return "C - Cartridge (Expandable)";
         case N64_DISK_EXPANDABLE:
-            return "E - Disk Expandable";
+            return "E - Disk (Expandable)";
         case N64_ALECK64:
             return "Z - Aleck64";
         default:
@@ -64,6 +65,27 @@ static char *format_rom_save_type (uint8_t save_type) {
     }
 }
 
+static char *format_rom_memory_type (uint8_t memory_type) {
+    switch (memory_type)
+    {
+    case DB_MEMORY_EXPANSION_REQUIRED:
+        return "Required";
+        break;
+    case DB_MEMORY_EXPANSION_SUGGESTED:
+        return "Suggested";
+        break;
+    case DB_MEMORY_EXPANSION_ENHANCED:
+        return "Enhanced";
+        break;
+    case DB_MEMORY_EXPANSION_FAULTY:
+        return "May have issues";
+        break;
+    default:
+        return "Not required";
+        break;
+    }
+}
+
 static flashcart_save_type_t convert_save_type (uint8_t save_type) {
     switch (save_type) {
         case DB_SAVE_TYPE_EEPROM_4K:
@@ -162,6 +184,7 @@ static void draw (menu_t *menu, surface_t *d) {
         text_y += fragment_textf(text_x, text_y, "Version: %hhu", rom_header.version);
         text_y += fragment_textf(text_x, text_y, "Checksum: 0x%016llX", rom_header.checksum);
         text_y += fragment_textf(text_x, text_y, "ROM endian: %s", format_rom_endian(rom_header.endian));
+        text_y += fragment_textf(text_x, text_y, "Expansion PAK: %s", format_rom_memory_type(rom_db_match_expansion_pak(rom_header)));
 
         // Actions bar
         text_y = layout->actions_y + layout->offset_text_y;

src/menu/views/system_info.c

@@ -51,6 +51,11 @@ static void draw (menu_t *menu, surface_t *d) {
 
     vertical_position += font_vertical_pixels;
 
+    sprintf(str_buffer, "Expansion PAK is %sinserted\n", is_memory_expanded() ? "" : "not " );
+    graphics_draw_text(d, horizontal_start_position, vertical_position += font_vertical_pixels, str_buffer);
+
+    vertical_position += font_vertical_pixels;
+
     int controllers = get_controllers_present();
 
     sprintf(str_buffer, "JoyPad 1 is %sconnected\n", (controllers & CONTROLLER_1_INSERTED) ? "" : "not " );