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V31A: Fix writing Game Boy custom MBC3 Flashcart with MX29F016 flashrom
These: https://www.jrodrigo.net/wiki/how-to-diy-a-gameboy-flash-cartridge-with-a-rom-adapter-board/
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sanni
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@ -2,8 +2,8 @@
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Cartridge Reader for Arduino Mega2560
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Author: sanni
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Date: 2018-04-02
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Version: V31
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Date: 2018-04-03
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Version: V31A
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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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@ -35,7 +35,7 @@
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infinest - help with GB Memory cart
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**********************************************************************************/
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char ver[5] = "V31";
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char ver[5] = "V31A";
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/******************************************
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Define Starting Point
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@ -23,9 +23,10 @@ static const char* const menuOptionsGBx[] PROGMEM = {gbxMenuItem1, gbxMenuItem2,
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static const char GBMenuItem1[] PROGMEM = "Read Rom";
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static const char GBMenuItem2[] PROGMEM = "Read Save";
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static const char GBMenuItem3[] PROGMEM = "Write Save";
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static const char GBMenuItem4[] PROGMEM = "Write Flashcart";
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static const char GBMenuItem5[] PROGMEM = "Reset";
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static const char* const menuOptionsGB[] PROGMEM = {GBMenuItem1, GBMenuItem2, GBMenuItem3, GBMenuItem4, GBMenuItem5};
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static const char GBMenuItem4[] PROGMEM = "Flash MBC3 cart";
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static const char GBMenuItem5[] PROGMEM = "Flash MBC5 cart";
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static const char GBMenuItem6[] PROGMEM = "Reset";
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static const char* const menuOptionsGB[] PROGMEM = {GBMenuItem1, GBMenuItem2, GBMenuItem3, GBMenuItem4, GBMenuItem5, GBMenuItem6};
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// Start menu for both GB and GBA
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void gbxMenu() {
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@ -62,11 +63,11 @@ void gbxMenu() {
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}
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void gbMenu() {
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// create menu with title and 5 options to choose from
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// create menu with title and 6 options to choose from
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unsigned char mainMenu;
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// Copy menuOptions out of progmem
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convertPgm(menuOptionsGB, 5);
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mainMenu = question_box("GB Cart Reader", menuOptions, 5, 0);
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convertPgm(menuOptionsGB, 6);
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mainMenu = question_box("GB Cart Reader", menuOptions, 6, 0);
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// wait for user choice to come back from the question box menu
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switch (mainMenu)
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@ -120,13 +121,24 @@ void gbMenu() {
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case 3:
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// Change working dir to root
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sd.chdir("/");
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writeFlash_GB();
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//MBC3
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writeFlash_GB(3);
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// Reset
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wait();
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asm volatile (" jmp 0");
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break;
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case 4:
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// Change working dir to root
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sd.chdir("/");
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//MBC5
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writeFlash_GB(5);
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// Reset
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wait();
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asm volatile (" jmp 0");
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break;
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case 5:
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asm volatile (" jmp 0");
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break;
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}
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@ -708,7 +720,7 @@ unsigned long verifySRAM_GB() {
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// Write 29F032 flashrom
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// A0-A13 directly connected to cart edge -> 16384(0x0-0x3FFF) bytes per bank -> 256(0x0-0xFF) banks
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// A14-A21 connected to MBC5
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void writeFlash_GB() {
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void writeFlash_GB(byte MBC) {
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// Launch filebrowser
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filePath[0] = '\0';
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sd.chdir("/");
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@ -850,54 +862,101 @@ void writeFlash_GB() {
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}
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}
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println_Msg(F("Writing flash"));
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display_Update();
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if (MBC == 3) {
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println_Msg(F("Writing flash MBC3"));
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display_Update();
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// Write flash
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dataOut();
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// Write flash
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dataOut();
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for (int currBank = 0; currBank < romBanks; currBank++) {
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// Blink led
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PORTB ^= (1 << 4);
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uint16_t currAddr = 0;
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// Set ROM bank
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writeByte_GB(0x2000, currBank);
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// 0x2A8000 fix
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writeByte_GB(0x4000, 0x0);
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for (int currBank = 1; currBank < romBanks; currBank++) {
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// Blink led
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PORTB ^= (1 << 4);
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for (unsigned int currAddr = 0x4000; currAddr < 0x7FFF; currAddr += 512) {
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myFile.read(sdBuffer, 512);
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// Set ROM bank
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writeByte_GB(0x2100, currBank);
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for (int currByte = 0; currByte < 512; currByte++) {
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// Write command sequence
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writeByte_GB(0x555, 0xaa);
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writeByte_GB(0x2aa, 0x55);
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writeByte_GB(0x555, 0xa0);
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// Write current byte
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writeByte_GB(currAddr + currByte, sdBuffer[currByte]);
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if (currBank > 1) {
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currAddr = 0x4000;
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}
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// Set data pins to input
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dataIn();
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while (currAddr <= 0x7FFF) {
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myFile.read(sdBuffer, 512);
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// Setting CS(PH3) and OE/RD(PH6) LOW
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PORTH &= ~((1 << 3) | (1 << 6));
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for (int currByte = 0; currByte < 512; currByte++) {
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// Write command sequence
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writeByte_GB(0x555, 0xaa);
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writeByte_GB(0x2aa, 0x55);
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writeByte_GB(0x555, 0xa0);
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// Write current byte
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writeByte_GB(currAddr + currByte, sdBuffer[currByte]);
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// Busy check
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//int timeout = 0;
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while ((PINC & 0x80) != (sdBuffer[currByte] & 0x80)) {
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/* __asm__("nop\n\t");
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// timeout in case writing fails
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timeout++;
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if (timeout > 32760) {
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break;
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}*/
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// Set data pins to input
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dataIn();
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// Setting CS(PH3) and OE/RD(PH6) LOW
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PORTH &= ~((1 << 3) | (1 << 6));
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// Busy check
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while ((PINC & 0x80) != (sdBuffer[currByte] & 0x80)) {
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}
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// Switch CS(PH3) and OE/RD(PH6) to HIGH
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PORTH |= (1 << 3) | (1 << 6);
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// Set data pins to output
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dataOut();
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}
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currAddr += 512;
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}
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}
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}
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// Switch CS(PH3) and OE/RD(PH6) to HIGH
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PORTH |= (1 << 3) | (1 << 6);
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else if (MBC == 5) {
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println_Msg(F("Writing flash MBC5"));
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display_Update();
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// Set data pins to output
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dataOut();
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// Write flash
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dataOut();
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for (int currBank = 0; currBank < romBanks; currBank++) {
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// Blink led
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PORTB ^= (1 << 4);
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// Set ROM bank
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writeByte_GB(0x2000, currBank);
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// 0x2A8000 fix
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writeByte_GB(0x4000, 0x0);
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for (unsigned int currAddr = 0x4000; currAddr < 0x7FFF; currAddr += 512) {
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myFile.read(sdBuffer, 512);
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for (int currByte = 0; currByte < 512; currByte++) {
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// Write command sequence
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writeByte_GB(0x555, 0xaa);
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writeByte_GB(0x2aa, 0x55);
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writeByte_GB(0x555, 0xa0);
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// Write current byte
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writeByte_GB(currAddr + currByte, sdBuffer[currByte]);
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// Set data pins to input
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dataIn();
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// Setting CS(PH3) and OE/RD(PH6) LOW
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PORTH &= ~((1 << 3) | (1 << 6));
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// Busy check
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while ((PINC & 0x80) != (sdBuffer[currByte] & 0x80)) {
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}
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// Switch CS(PH3) and OE/RD(PH6) to HIGH
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PORTH |= (1 << 3) | (1 << 6);
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// Set data pins to output
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dataOut();
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}
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}
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}
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}
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