mirror of
https://github.com/sanni/cartreader.git
synced 2024-06-03 02:48:43 +02:00
V17B: Read header info even if checksum is corrupt
Some prototypes or hacked roms don't have a valid checksum in the header but still provide useful information like rom size.
This commit is contained in:
sanni
GitHub
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050b499c64
commit
8cee474a3f
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@ -2,8 +2,8 @@
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Nintendo Cart Reader for Arduino Mega2560
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Author: sanni
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Date: 2016-07-11
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Version: V17A
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Date: 2016-07-13
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Version: V17B
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SD lib: https://github.com/greiman/SdFat
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LCD lib: https://github.com/adafruit/Adafruit_SSD1306
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@ -29,7 +29,7 @@
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Snes9x - SuperFX Sram Fix
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**********************************************************************************/
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char ver[5] = "V17A";
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char ver[5] = "V17B";
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/******************************************
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Choose Output
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@ -403,7 +403,6 @@ void mainMenu() {
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// get input button
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int b = checkButton();
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// Send some clock pulses to the Eeprom in case it locked up
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// if the cart readers input button is pressed shortly
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if (b == 1) {
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asm volatile (" jmp 0");
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@ -126,7 +126,7 @@ void NPGameMenu() {
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strcpy(romName, gameCode[gameSubMenu + 1]);
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// Print info
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printStartPage();
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getCartInfo_SNES();
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mode = mode_NPGame;
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}
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else {
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@ -139,7 +139,7 @@ void NPGameMenu() {
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strcpy(romName, gameCode[0]);
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// Print info
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printStartPage();
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getCartInfo_SNES();
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mode = mode_NPGame;
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}
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}
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@ -34,11 +34,12 @@ const char SnesMenuItem5[] PROGMEM = "Reset";
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const char* const menuOptionsSNES[] PROGMEM = {SnesMenuItem1, SnesMenuItem2, SnesMenuItem3, SnesMenuItem4, SnesMenuItem5};
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// Manual config menu items
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const char confMenuItem1[] PROGMEM = "4MB LoRom 256K Sram";
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const char confMenuItem2[] PROGMEM = "4MB HiRom 64K Sram";
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const char confMenuItem3[] PROGMEM = "6MB ExRom 256K Sram";
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const char confMenuItem4[] PROGMEM = "Reset";
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const char* const menuOptionsConf[] PROGMEM = {confMenuItem1, confMenuItem2, confMenuItem3, confMenuItem4};
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const char confMenuItem1[] PROGMEM = "Use header info";
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const char confMenuItem2[] PROGMEM = "4MB LoRom 256K Sram";
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const char confMenuItem3[] PROGMEM = "4MB HiRom 64K Sram";
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const char confMenuItem4[] PROGMEM = "6MB ExRom 256K Sram";
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const char confMenuItem5[] PROGMEM = "Reset";
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const char* const menuOptionsConf[] PROGMEM = {confMenuItem1, confMenuItem2, confMenuItem3, confMenuItem4, confMenuItem5};
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// SNES Menu
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void snesMenu() {
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@ -118,37 +119,40 @@ void snesMenu() {
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// Menu for manual configuration
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void confMenu() {
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// create menu with title and 4 options to choose from
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// create menu with title and 5 options to choose from
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unsigned char subMenu;
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// Copy menuOptions of of progmem
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convertPgm(menuOptionsConf, 4);
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subMenu = question_box("Choose mapping", menuOptions, 4, 0);
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convertPgm(menuOptionsConf, 5);
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subMenu = question_box("Choose mapping", menuOptions, 5, 0);
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// wait for user choice to come back from the question box menu
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switch (subMenu)
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{
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case 0:
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break;
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case 1:
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romType = LO;
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numBanks = 128;
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sramSize = 256;
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strcpy(romName, "LOROM");
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break;
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case 1:
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case 2:
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romType = HI;
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numBanks = 64;
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sramSize = 64;
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strcpy(romName, "HIROM");
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break;
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case 2:
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case 3:
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romType = EX;
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numBanks = 96;
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sramSize = 256;
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strcpy(romName, "EXROM");
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break;
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case 3:
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case 4:
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// Reset
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asm volatile (" jmp 0");
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break;
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@ -237,7 +241,7 @@ void setup_Snes() {
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delay(1000);
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// Print all the info
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printStartPage();
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getCartInfo_SNES();
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}
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/******************************************
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@ -303,11 +307,17 @@ byte readBank_SNES(byte myBank, word myAddress) {
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/******************************************
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SNES ROM Functions
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******************************************/
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void printStartPage() {
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void getCartInfo_SNES() {
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boolean manualConfig = 0;
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// Print start page
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if (checkcart() == 0) {
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display_Clear();
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if (checkcart_SNES() == 0) {
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// Checksum either corrupt or 0000
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manualConfig = 1;
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errorLvl = 1;
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rgb.setColor(255, 0, 0);
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display_Clear();
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println_Msg(F("ERROR"));
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println_Msg(F("Rom header corrupt"));
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println_Msg(F("or missing"));
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@ -318,86 +328,91 @@ void printStartPage() {
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println_Msg(F("or powercycle if SA1"));
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display_Update();
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wait();
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confMenu();
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// Wait() clears errors but in this case we still have an error
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errorLvl = 1;
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}
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else {
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display_Clear();
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print_Msg(F("Rom Name: "));
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println_Msg(romName);
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print_Msg(F("Type: "));
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if (romType == HI)
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print_Msg(F("HiROM"));
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else if (romType == LO)
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print_Msg(F("LoROM"));
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else if (romType == EX)
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print_Msg(F("ExHiRom"));
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else
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print_Msg(romType);
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print_Msg(F(" "));
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if (romSpeed == 0)
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println_Msg(F("SlowROM"));
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else if (romSpeed == 2)
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println_Msg(F("SlowROM"));
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else if (romSpeed == 3)
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println_Msg(F("FastROM"));
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else
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println_Msg(romSpeed);
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display_Clear();
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print_Msg(F("Rom Name: "));
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println_Msg(romName);
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print_Msg(F("ICs: ROM "));
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if (romChips == 0)
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println_Msg(F("ONLY"));
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else if (romChips == 1)
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println_Msg(F("RAM"));
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else if (romChips == 2)
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println_Msg(F("SAVE"));
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else if (romChips == 3)
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println_Msg(F("DSP1"));
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else if (romChips == 4)
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println_Msg(F("DSP1 RAM"));
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else if (romChips == 5)
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println_Msg(F("DSP1 SAVE"));
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else if ((romChips == 19) || (romChips == 20) || (romChips == 21) || (romChips == 26))
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println_Msg(F("SuperFX"));
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else if (romChips == 52) {
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println_Msg(F("SA1 RAM"));
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romType = SA;
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}
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else if (romChips == 53) {
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println_Msg(F("SA1 RAM BATT"));
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romType = SA;
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}
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else if (romChips == 227)
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println_Msg(F("RAM GBoy"));
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else if (romChips == 246)
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println_Msg(F("DSP2"));
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else
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println_Msg(F(""));
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print_Msg(F("Type: "));
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if (romType == HI)
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print_Msg(F("HiROM"));
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else if (romType == LO)
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print_Msg(F("LoROM"));
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else if (romType == EX)
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print_Msg(F("ExHiRom"));
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else
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print_Msg(romType);
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print_Msg(F(" "));
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if (romSpeed == 0)
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println_Msg(F("SlowROM"));
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else if (romSpeed == 2)
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println_Msg(F("SlowROM"));
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else if (romSpeed == 3)
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println_Msg(F("FastROM"));
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else
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println_Msg(romSpeed);
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print_Msg(F("Rom Size: "));
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print_Msg(romSize);
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println_Msg(F("Mbit"));
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print_Msg(F("ICs: ROM "));
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if (romChips == 0)
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println_Msg(F("ONLY"));
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else if (romChips == 1)
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println_Msg(F("RAM"));
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else if (romChips == 2)
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println_Msg(F("SAVE"));
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else if (romChips == 3)
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println_Msg(F("DSP1"));
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else if (romChips == 4)
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println_Msg(F("DSP1 RAM"));
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else if (romChips == 5)
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println_Msg(F("DSP1 SAVE"));
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else if ((romChips == 19) || (romChips == 20) || (romChips == 21) || (romChips == 26))
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println_Msg(F("SuperFX"));
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else if (romChips == 52) {
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println_Msg(F("SA1 RAM"));
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romType = SA;
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}
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else if (romChips == 53) {
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println_Msg(F("SA1 RAM BATT"));
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romType = SA;
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}
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else if (romChips == 227)
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println_Msg(F("RAM GBoy"));
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else if (romChips == 246)
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println_Msg(F("DSP2"));
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else
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println_Msg(F(""));
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print_Msg(F("Banks: "));
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println_Msg(numBanks);
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print_Msg(F("Rom Size: "));
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print_Msg(romSize);
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println_Msg(F("Mbit"));
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print_Msg(F("Sram Size: "));
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print_Msg(sramSize);
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println_Msg(F("Kbit"));
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print_Msg(F("Banks: "));
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println_Msg(numBanks);
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print_Msg(F("ROM Version: 1."));
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println_Msg(romVersion);
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print_Msg(F("Sram Size: "));
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print_Msg(sramSize);
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println_Msg(F("Kbit"));
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print_Msg(F("Checksum: "));
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println_Msg(checksumStr);
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display_Update();
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print_Msg(F("ROM Version: 1."));
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println_Msg(romVersion);
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// Wait for user input
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println_Msg(F(" "));
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println_Msg(F(" "));
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println_Msg(F("Press Button..."));
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display_Update();
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wait();
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print_Msg(F("Checksum: "));
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println_Msg(checksumStr);
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display_Update();
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// Wait for user input
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println_Msg(F(" "));
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println_Msg(F(" "));
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println_Msg(F("Press Button..."));
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display_Update();
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wait();
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// Start manual config
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if (manualConfig == 1) {
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confMenu();
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}
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}
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@ -447,7 +462,7 @@ void checkAltConf() {
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}
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// Read header information
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void getCartInfo_SNES() {
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boolean checkcart_SNES() {
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// set control to read
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dataIn();
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@ -533,17 +548,18 @@ void getCartInfo_SNES() {
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// ROM Version
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romVersion = readBank_SNES(0, 65499);
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}
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boolean checkcart() {
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// If cart is present and checksum is equal to reverse checksum
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// Test if checksum is equal to reverse checksum
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if (((word(readBank_SNES(0, 65500)) + (word(readBank_SNES(0, 65501)) * 256)) + (word(readBank_SNES(0, 65502)) + (word(readBank_SNES(0, 65503)) * 256))) == 65535 ) {
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getCartInfo_SNES();
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return 1;
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if (strcmp("0000", checksumStr) == 0) {
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return 0;
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}
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else {
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return 1;
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}
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}
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// Either rom checksum is wrong or no cart is inserted
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else {
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errorLvl = 1;
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return 0;
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}
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}
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