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cd0430065c
cartreader/Cart_Reader/GB.ino
sanni 8b96d250bd Add MD database
2022-06-16 17:17:16 +02:00

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//******************************************
// GAME BOY MODULE
//******************************************
#include "options.h"
#ifdef enable_GBX
/******************************************
Variables
*****************************************/
// Game Boy
int sramBanks;
int romBanks;
word lastByte = 0;
/******************************************
Menu
*****************************************/
// GBx start menu
static const char gbxMenuItem1[] PROGMEM = "Game Boy (Color)";
static const char gbxMenuItem2[] PROGMEM = "Game Boy Advance";
static const char gbxMenuItem3[] PROGMEM = "Flash GBC Cart";
static const char gbxMenuItem4[] PROGMEM = "NPower GB Memory";
static const char gbxMenuItem5[] PROGMEM = "Reset";
static const char* const menuOptionsGBx[] PROGMEM = {gbxMenuItem1, gbxMenuItem2, gbxMenuItem3, gbxMenuItem4, gbxMenuItem5};
// GB menu items
static const char GBMenuItem1[] PROGMEM = "Read Rom";
static const char GBMenuItem2[] PROGMEM = "Read Save";
static const char GBMenuItem3[] PROGMEM = "Write Save";
static const char GBMenuItem4[] PROGMEM = "Reset";
static const char* const menuOptionsGB[] PROGMEM = {GBMenuItem1, GBMenuItem2, GBMenuItem3, GBMenuItem4};
// GB Flash items
static const char GBFlashItem1[] PROGMEM = "29F Cart (MBC3)";
static const char GBFlashItem2[] PROGMEM = "29F Cart (MBC5)";
static const char GBFlashItem3[] PROGMEM = "29F Cart (CAM)";
static const char GBFlashItem4[] PROGMEM = "CFI Cart";
static const char GBFlashItem5[] PROGMEM = "CFI Cart and Save";
static const char GBFlashItem6[] PROGMEM = "GB Smart";
static const char GBFlashItem7[] PROGMEM = "Reset";
static const char* const menuOptionsGBFlash[] PROGMEM = {GBFlashItem1, GBFlashItem2, GBFlashItem3, GBFlashItem4, GBFlashItem5, GBFlashItem6, GBFlashItem7};
// Start menu for both GB and GBA
void gbxMenu() {
// create menu with title and 4 options to choose from
unsigned char gbType;
// Copy menuOptions out of progmem
convertPgm(menuOptionsGBx, 5);
gbType = question_box(F("Select Game Boy"), menuOptions, 5, 0);
// wait for user choice to come back from the question box menu
switch (gbType)
{
case 0:
display_Clear();
display_Update();
setup_GB();
mode = mode_GB;
break;
case 1:
display_Clear();
display_Update();
setup_GBA();
mode = mode_GBA;
break;
case 2:
// create submenu with title and 7 options to choose from
unsigned char gbFlash;
// Copy menuOptions out of progmem
convertPgm(menuOptionsGBFlash, 7);
gbFlash = question_box(F("Select type"), menuOptions, 7, 0);
// wait for user choice to come back from the question box menu
switch (gbFlash)
{
case 0:
//Flash MBC3
display_Clear();
display_Update();
setup_GB();
mode = mode_GB;
// Change working dir to root
sd.chdir("/");
//MBC3
writeFlash29F_GB(3, 1);
// Reset
println_Msg(F("Press Button..."));
display_Update();
wait();
resetArduino();
break;
case 1:
//Flash MBC5
display_Clear();
display_Update();
setup_GB();
mode = mode_GB;
// Change working dir to root
sd.chdir("/");
//MBC5
writeFlash29F_GB(5, 1);
// Reset
println_Msg(F("Press Button..."));
display_Update();
wait();
resetArduino();
break;
case 2:
//Flash GB Camera
display_Clear();
display_Update();
setup_GB();
mode = mode_GB;
//Flash first bank with erase
// Change working dir to root
sd.chdir("/");
//MBC3
writeFlash29F_GB(3, 1);
println_Msg(F("Press Button..."));
display_Update();
wait();
display_Clear();
println_Msg(F("Please change the"));
println_Msg(F("switch on the cart"));
println_Msg(F("to B2 (Bank 2)"));
println_Msg(F("if you want to flash"));
println_Msg(F("a second game"));
println_Msg(F(""));
println_Msg(F("Press Button..."));
display_Update();
wait();
// Flash second bank without erase
// Change working dir to root
sd.chdir("/");
//MBC3
writeFlash29F_GB(3, 0);
// Reset
println_Msg(F(""));
println_Msg(F("Press Button..."));
display_Update();
wait();
resetArduino();
break;
case 3:
// Flash CFI
display_Clear();
display_Update();
setup_GB();
mode = mode_GB;
// Change working dir to root
sd.chdir("/");
// Launch filebrowser
filePath[0] = '\0';
sd.chdir("/");
fileBrowser(F("Select file"));
display_Clear();
identifyCFI_GB();
if (!writeCFI_GB()) {
display_Clear();
println_Msg(F("Flashing failed, time out!"));
println_Msg(F("Press Button..."));
display_Update();
wait();
}
// Reset
wait();
resetArduino();
break;
case 4:
// Flash CFI and Save
display_Clear();
display_Update();
setup_GB();
mode = mode_GB;
// Change working dir to root
sd.chdir("/");
// Launch filebrowser
filePath[0] = '\0';
sd.chdir("/");
fileBrowser(F("Select file"));
display_Clear();
identifyCFI_GB();
if (!writeCFI_GB()) {
display_Clear();
println_Msg(F("Flashing failed, time out!"));
println_Msg(F("Press Button..."));
display_Update();
wait();
resetArduino();
}
getCartInfo_GB();
// Does cartridge have SRAM
if (lastByte > 0) {
// Remove file name ending
int pos = -1;
while (fileName[++pos] != '\0') {
if (fileName[pos] == '.') {
fileName[pos] = '\0';
break;
}
}
sprintf(filePath, "/GB/SAVE/%s/", fileName);
bool saveFound = false;
if (sd.exists(filePath)) {
EEPROM_readAnything(0, foldern);
for (int i = foldern; i >= 0; i--) {
sprintf(filePath, "/GB/SAVE/%s/%d/%s.SAV", fileName, i, fileName);
if (sd.exists(filePath)) {
print_Msg(F("Save number "));
print_Msg(i);
println_Msg(F(" found."));
saveFound = true;
sprintf(filePath, "/GB/SAVE/%s/%d", fileName, i);
sprintf(fileName, "%s.SAV", fileName);
writeSRAM_GB();
unsigned long wrErrors;
wrErrors = verifySRAM_GB();
if (wrErrors == 0) {
println_Msg(F("Verified OK"));
display_Update();
}
else {
print_Msg(F("Error: "));
print_Msg(wrErrors);
println_Msg(F(" bytes "));
print_Error(F("did not verify."), false);
}
break;
}
}
}
if (!saveFound) {
println_Msg(F("Error: No save found."));
}
}
else {
print_Error(F("Cart has no Sram"), false);
}
// Reset
wait();
resetArduino();
break;
case 5:
// Flash GB Smart
display_Clear();
display_Update();
setup_GBSmart();
mode = mode_GB_GBSmart;
break;
case 6:
resetArduino();
break;
}
break;
case 3:
// Flash GB Memory
display_Clear();
display_Update();
setup_GBM();
mode = mode_GBM;
break;
case 4:
resetArduino();
break;
}
}
void gbMenu() {
// create menu with title and 3 options to choose from
unsigned char mainMenu;
// Copy menuOptions out of progmem
convertPgm(menuOptionsGB, 4);
mainMenu = question_box(F("GB Cart Reader"), menuOptions, 4, 0);
// wait for user choice to come back from the question box menu
switch (mainMenu)
{
case 0:
display_Clear();
// Change working dir to root
sd.chdir("/");
readROM_GB();
compare_checksums_GB();
#ifdef global_log
save_log();
#endif
break;
case 1:
display_Clear();
// Does cartridge have SRAM
if (lastByte > 0) {
// Change working dir to root
sd.chdir("/");
readSRAM_GB();
}
else {
print_Error(F("Cart has no Sram"), false);
}
println_Msg(F(""));
break;
case 2:
display_Clear();
// Does cartridge have SRAM
if (lastByte > 0) {
// Change working dir to root
sd.chdir("/");
filePath[0] = '\0';
fileBrowser(F("Select sav file"));
writeSRAM_GB();
unsigned long wrErrors;
wrErrors = verifySRAM_GB();
if (wrErrors == 0) {
println_Msg(F("Verified OK"));
display_Update();
}
else {
print_Msg(F("Error: "));
print_Msg(wrErrors);
println_Msg(F(" bytes "));
print_Error(F("did not verify."), false);
}
}
else {
print_Error(F("Cart has no Sram"), false);
}
println_Msg(F(""));
break;
case 3:
resetArduino();
break;
}
println_Msg(F("Press Button..."));
display_Update();
wait();
}
/******************************************
Setup
*****************************************/
void setup_GB() {
// Set Address Pins to Output
//A0-A7
DDRF = 0xFF;
//A8-A15
DDRK = 0xFF;
// Set Control Pins to Output RST(PH0) CLK(PH1) CS(PH3) WR(PH5) RD(PH6)
DDRH |= (1 << 0) | (1 << 1) | (1 << 3) | (1 << 5) | (1 << 6);
// Output a high signal on all pins, pins are active low therefore everything is disabled now
PORTH |= (1 << 3) | (1 << 5) | (1 << 6);
// Output a low signal on CLK(PH1) to disable writing GB Camera RAM
// Output a low signal on RST(PH0) to initialize MMC correctly
PORTH &= ~((1 << 0) | (1 << 1));
// Set Data Pins (D0-D7) to Input
DDRC = 0x00;
// Enable Internal Pullups
PORTC = 0xFF;
delay(400);
// RST(PH0) to H
PORTH |= (1 << 0);
// Print start page
getCartInfo_GB();
showCartInfo_GB();
// MMM01 initialize
if (romType >= 11 && romType <= 13) {
writeByte_GB(0x3fff, 0x00);
writeByte_GB(0x5fff, 0x40);
writeByte_GB(0x7fff, 0x01);
writeByte_GB(0x1fff, 0x3a);
writeByte_GB(0x1fff, 0x7a);
}
}
void showCartInfo_GB() {
display_Clear();
if (strcmp(checksumStr, "00") != 0) {
println_Msg(F("GB Cart Info"));
print_Msg(F("Name: "));
println_Msg(romName);
print_Msg(F("Mapper: "));
if ((romType == 0) || (romType == 8) || (romType == 9))
print_Msg(F("none"));
else if ((romType == 1) || (romType == 2) || (romType == 3))
print_Msg(F("MBC1"));
else if ((romType == 5) || (romType == 6))
print_Msg(F("MBC2"));
else if ((romType == 11) || (romType == 12) || (romType == 13))
print_Msg(F("MMM01"));
else if ((romType == 15) || (romType == 16) || (romType == 17) || (romType == 18) || (romType == 19))
print_Msg(F("MBC3"));
else if ((romType == 21) || (romType == 22) || (romType == 23))
print_Msg(F("MBC4"));
else if ((romType == 25) || (romType == 26) || (romType == 27) || (romType == 28) || (romType == 29) || (romType == 309))
print_Msg(F("MBC5"));
if (romType == 252)
print_Msg(F("Camera"));
println_Msg(F(" "));
print_Msg(F("Rom Size: "));
switch (romSize) {
case 0:
print_Msg(F("32KB"));
break;
case 1:
print_Msg(F("64KB"));
break;
case 2:
print_Msg(F("128KB"));
break;
case 3:
print_Msg(F("256KB"));
break;
case 4:
print_Msg(F("512KB"));
break;
case 5:
print_Msg(F("1MB"));
break;
case 6:
print_Msg(F("2MB"));
break;
case 7:
print_Msg(F("4MB"));
break;
}
println_Msg(F(""));
print_Msg(F("Banks: "));
println_Msg(romBanks);
print_Msg(F("Sram Size: "));
switch (sramSize) {
case 0:
if (romType == 6) {
print_Msg(F("512B"));
}
else {
print_Msg(F("none"));
}
break;
case 1:
print_Msg(F("2KB"));
break;
case 2:
print_Msg(F("8KB"));
break;
case 3:
print_Msg(F("32KB"));
break;
case 4:
print_Msg(F("128KB"));
break;
default: print_Msg(F("none"));
}
println_Msg(F(""));
print_Msg(F("Checksum: "));
println_Msg(checksumStr);
display_Update();
// Wait for user input
println_Msg(F("Press Button..."));
display_Update();
wait();
}
else {
print_Error(F("GAMEPAK ERROR"), true);
}
}
/******************************************
Low level functions
*****************************************/
byte readByte_GB(word myAddress) {
// Set address
PORTF = myAddress & 0xFF;
PORTK = (myAddress >> 8) & 0xFF;
// Switch data pins to input
DDRC = 0x00;
// Enable pullups
PORTC = 0xFF;
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
// Switch RD(PH6) to LOW
PORTH &= ~(1 << 6);
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
// Read
byte tempByte = PINC;
// Switch and RD(PH6) to HIGH
PORTH |= (1 << 6);
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
return tempByte;
}
void writeByte_GB(int myAddress, byte myData) {
// Set address
PORTF = myAddress & 0xFF;
PORTK = (myAddress >> 8) & 0xFF;
// Set data
PORTC = myData;
// Switch data pins to output
DDRC = 0xFF;
// Wait till output is stable
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
// Pull WR(PH5) low
PORTH &= ~(1 << 5);
// Leave WR low for at least 60ns
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
// Pull WR(PH5) HIGH
PORTH |= (1 << 5);
// Leave WR high for at least 50ns
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
// Switch data pins to input
DDRC = 0x00;
// Enable pullups
PORTC = 0xFF;
}
// Triggers CS and CLK pin
byte readByteSRAM_GB(word myAddress) {
PORTF = myAddress & 0xFF;
PORTK = (myAddress >> 8) & 0xFF;
// Switch data pins to input
DDRC = 0x00;
// Enable pullups
PORTC = 0xFF;
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
// Pull CS(PH3) CLK(PH1)(for FRAM MOD) LOW
PORTH &= ~((1 << 3) | (1 << 1));
// Pull RD(PH6) LOW
PORTH &= ~(1 << 6);
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
// Read
byte tempByte = PINC;
// Pull RD(PH6) HIGH
PORTH |= (1 << 6);
if (romType == 252) {
// Pull CS(PH3) HIGH
PORTH |= (1 << 3);
}
else {
// Pull CS(PH3) CLK(PH1)(for FRAM MOD) HIGH
PORTH |= (1 << 3) | (1 << 1);
}
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
return tempByte;
}
// Triggers CS and CLK pin
void writeByteSRAM_GB(int myAddress, byte myData) {
// Set address
PORTF = myAddress & 0xFF;
PORTK = (myAddress >> 8) & 0xFF;
// Set data
PORTC = myData;
// Switch data pins to output
DDRC = 0xFF;
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
if (romType == 252) {
// Pull CS(PH3) LOW
PORTH &= ~(1 << 3);
// Pull CLK(PH1)(for GB CAM) HIGH
PORTH |= (1 << 1);
// Pull WR(PH5) low
PORTH &= ~(1 << 5);
}
else {
// Pull CS(PH3) CLK(PH1)(for FRAM MOD) LOW
PORTH &= ~((1 << 3) | (1 << 1));
// Pull WR(PH5) low
PORTH &= ~(1 << 5);
}
// Leave WR low for at least 60ns
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
if (romType == 252) {
// Pull WR(PH5) HIGH
PORTH |= (1 << 5);
// Pull CS(PH3) HIGH
PORTH |= (1 << 3);
// Pull CLK(PH1) LOW (for GB CAM)
PORTH &= ~(1 << 1);
}
else {
// Pull WR(PH5) HIGH
PORTH |= (1 << 5);
// Pull CS(PH3) CLK(PH1)(for FRAM MOD) HIGH
PORTH |= (1 << 3) | (1 << 1);
}
// Leave WR high for at least 50ns
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
// Switch data pins to input
DDRC = 0x00;
// Enable pullups
PORTC = 0xFF;
}
/******************************************
Game Boy functions
*****************************************/
// Read Cartridge Header
void getCartInfo_GB() {
// Read Header into array
for (int currByte = 0x100; currByte < 0x150; currByte++) {
sdBuffer[currByte] = readByte_GB(currByte);
}
/* Compare Nintendo logo against known checksum, 156 bytes starting at 0x04
word logoChecksum = 0;
for (int currByte = 0x104; currByte < 0x134; currByte++) {
logoChecksum += sdBuffer[currByte];
}
if (logoChecksum != 0x1546) {
print_Error(F("STARTUP LOGO ERROR"), false);
println_Msg(F(""));
println_Msg(F(""));
println_Msg(F(""));
println_Msg(F("Press Button to"));
println_Msg(F("ignore or powercycle"));
println_Msg(F("to try again"));
display_Update();
wait();
}
*/
// Calculate header checksum
byte headerChecksum = 0;
for (int currByte = 0x134; currByte < 0x14D; currByte++) {
headerChecksum = headerChecksum - sdBuffer[currByte] - 1;
}
if (headerChecksum != sdBuffer[0x14D]) {
// Read Header into array a second time
for (int currByte = 0x100; currByte < 0x150; currByte++) {
sdBuffer[currByte] = readByte_GB(currByte);
}
// Calculate header checksum a second time
headerChecksum = 0;
for (int currByte = 0x134; currByte < 0x14D; currByte++) {
headerChecksum = headerChecksum - sdBuffer[currByte] - 1;
}
}
if (headerChecksum != sdBuffer[0x14D]) {
print_Error(F("HEADER CHECKSUM ERROR"), false);
println_Msg(F(""));
println_Msg(F(""));
println_Msg(F(""));
println_Msg(F("Press Button to"));
println_Msg(F("ignore or clean"));
println_Msg(F("cart and try again"));
display_Update();
wait();
}
romType = sdBuffer[0x147];
romSize = sdBuffer[0x148];
sramSize = sdBuffer[0x149];
// ROM banks
switch (romSize) {
case 0x00:
romBanks = 2;
break;
case 0x01:
romBanks = 4;
break;
case 0x02:
romBanks = 8;
break;
case 0x03:
romBanks = 16;
break;
case 0x04:
romBanks = 32;
break;
case 0x05:
romBanks = 64;
break;
case 0x06:
romBanks = 128;
break;
case 0x07:
romBanks = 256;
break;
default:
romBanks = 2;
}
// SRAM banks
sramBanks = 0;
if (romType == 6) {
sramBanks = 1;
}
// SRAM size
switch (sramSize) {
case 2:
sramBanks = 1;
break;
case 3:
sramBanks = 4;
break;
case 4:
sramBanks = 16;
break;
case 5:
sramBanks = 8;
break;
}
// Last byte of SRAM
if (romType == 6) {
lastByte = 0xA1FF;
}
if (sramSize == 1) {
lastByte = 0xA7FF;
}
else if (sramSize > 1) {
lastByte = 0xBFFF;
}
// Get Checksum as string
eepbit[6] = sdBuffer[0x14E];
eepbit[7] = sdBuffer[0x14F];
sprintf(checksumStr, "%02X%02X", eepbit[6], eepbit[7]);
// Get name
byte myLength = 0;
for (int addr = 0x0134; addr <= 0x13C; addr++) {
if (((char(sdBuffer[addr]) >= 48 && char(sdBuffer[addr]) <= 57) || (char(sdBuffer[addr]) >= 65 && char(sdBuffer[addr]) <= 122)) && myLength < 15) {
romName[myLength] = char(sdBuffer[addr]);
myLength++;
}
}
}
/******************************************
ROM functions
*****************************************/
// Read ROM
void readROM_GB() {
// Get name, add extension and convert to char array for sd lib
strcpy(fileName, romName);
strcat(fileName, ".GB");
// create a new folder for the rom file
EEPROM_readAnything(0, foldern);
sprintf(folder, "GB/ROM/%s/%d", romName, foldern);
sd.mkdir(folder, true);
sd.chdir(folder);
display_Clear();
print_Msg(F("Saving to "));
print_Msg(folder);
println_Msg(F("/..."));
display_Update();
// write new folder number back to eeprom
foldern = foldern + 1;
EEPROM_writeAnything(0, foldern);
//open file on sd card
if (!myFile.open(fileName, O_RDWR | O_CREAT)) {
print_Error(F("Can't create file on SD"), true);
}
word romAddress = 0;
//Initialize progress bar
uint32_t processedProgressBar = 0;
uint32_t totalProgressBar = (uint32_t)(romBanks) * 16384;
draw_progressbar(0, totalProgressBar);
for (word currBank = 1; currBank < romBanks; currBank++) {
// Second bank starts at 0x4000
if (currBank > 1) {
romAddress = 0x4000;
}
// Set ROM bank for MBC2/3/4/5
if (romType >= 5) {
if (romType >= 11 && romType <= 13) {
if ((currBank & 0x1f) == 0) {
// reset MMM01
PORTH &= ~(1 << 0);
PORTH |= (1 << 0);
// remap to higher 4Mbits ROM
writeByte_GB(0x3fff, 0x20);
writeByte_GB(0x5fff, 0x40);
writeByte_GB(0x7fff, 0x01);
writeByte_GB(0x1fff, 0x3a);
writeByte_GB(0x1fff, 0x7a);
// for every 4Mbits ROM, restart from 0x0000
romAddress = 0x0000;
currBank++;
}
else {
writeByte_GB(0x6000, 0);
writeByte_GB(0x2000, (currBank & 0x1f));
}
}
else {
writeByte_GB(0x2100, currBank);
}
}
// Set ROM bank for MBC1
else {
writeByte_GB(0x6000, 0);
writeByte_GB(0x4000, currBank >> 5);
writeByte_GB(0x2000, currBank & 0x1F);
}
// Read banks and save to SD
while (romAddress <= 0x7FFF) {
for (int i = 0; i < 512; i++) {
sdBuffer[i] = readByte_GB(romAddress + i);
}
myFile.write(sdBuffer, 512);
romAddress += 512;
processedProgressBar += 512;
draw_progressbar(processedProgressBar, totalProgressBar);
}
}
// Close the file:
myFile.close();
}
// Calculate checksum
unsigned int calc_checksum_GB (char* fileName, char* folder) {
unsigned int calcChecksum = 0;
// int calcFilesize = 0; // unused
unsigned long i = 0;
int c = 0;
// If file exists
if (myFile.open(fileName, O_READ)) {
//calcFilesize = myFile.fileSize() * 8 / 1024 / 1024; // unused
for (i = 0; i < (myFile.fileSize() / 512); i++) {
myFile.read(sdBuffer, 512);
for (c = 0; c < 512; c++) {
calcChecksum += sdBuffer[c];
}
}
myFile.close();
// Subtract checksum bytes
calcChecksum -= eepbit[6];
calcChecksum -= eepbit[7];
// Return result
return (calcChecksum);
}
// Else show error
else {
print_Error(F("DUMP ROM 1ST"), false);
return 0;
}
}
// Compare checksum
void compare_checksums_GB() {
println_Msg(F("Calculating Checksum..."));
display_Update();
strcpy(fileName, romName);
strcat(fileName, ".GB");
// last used rom folder
EEPROM_readAnything(0, foldern);
sprintf(folder, "GB/ROM/%s/%d", romName, foldern - 1);
if (strcmp(folder, "root") != 0)
sd.chdir(folder);
// Internal ROM checksum
char calcsumStr[5];
sprintf(calcsumStr, "%04X", calc_checksum_GB(fileName, folder));
if (strcmp(calcsumStr, checksumStr) == 0) {
print_Msg(F("Internal: "));
print_Msg(calcsumStr);
println_Msg(F(" -> OK"));
}
else {
print_Msg(F("Internal: "));
println_Msg(calcsumStr);
print_Error(F("Checksum Error"), false);
}
compareCRC("gb.txt");
display_Update();
//go to root
sd.chdir();
}
/******************************************
SRAM functions
*****************************************/
// Read RAM
void readSRAM_GB() {
// Does cartridge have RAM
if (lastByte > 0) {
// Get name, add extension and convert to char array for sd lib
strcpy(fileName, romName);
strcat(fileName, ".sav");
// create a new folder for the save file
EEPROM_readAnything(0, foldern);
sprintf(folder, "GB/SAVE/%s/%d", romName, foldern);
sd.mkdir(folder, true);
sd.chdir(folder);
// write new folder number back to eeprom
foldern = foldern + 1;
EEPROM_writeAnything(0, foldern);
//open file on sd card
if (!myFile.open(fileName, O_RDWR | O_CREAT)) {
print_Error(F("SD Error"), true);
}
// MBC2 Fix
readByte_GB(0x0134);
if (romType <= 4 || (romType >= 11 && romType <= 13)) {
writeByte_GB(0x6000, 1);
}
// Initialise MBC
writeByte_GB(0x0000, 0x0A);
// Switch SRAM banks
for (byte currBank = 0; currBank < sramBanks; currBank++) {
writeByte_GB(0x4000, currBank);
// Read SRAM
for (word sramAddress = 0xA000; sramAddress <= lastByte; sramAddress += 64) {
for (byte i = 0; i < 64; i++) {
sdBuffer[i] = readByteSRAM_GB(sramAddress + i);
}
myFile.write(sdBuffer, 64);
}
}
// Disable SRAM
writeByte_GB(0x0000, 0x00);
// Close the file:
myFile.close();
// Signal end of process
print_Msg(F("Saved to "));
print_Msg(folder);
println_Msg(F("/"));
display_Update();
}
else {
print_Error(F("Cart has no SRAM"), false);
}
}
// Write RAM
void writeSRAM_GB() {
// Does cartridge have SRAM
if (lastByte > 0) {
// Create filepath
sprintf(filePath, "%s/%s", filePath, fileName);
//open file on sd card
if (myFile.open(filePath, O_READ)) {
// MBC2 Fix
readByte_GB(0x0134);
// Enable SRAM for MBC1
if (romType <= 4 || (romType >= 11 && romType <= 13)) {
writeByte_GB(0x6000, 1);
}
// Initialise MBC
writeByte_GB(0x0000, 0x0A);
// Switch RAM banks
for (byte currBank = 0; currBank < sramBanks; currBank++) {
writeByte_GB(0x4000, currBank);
// Write RAM
for (word sramAddress = 0xA000; sramAddress <= lastByte; sramAddress++) {
writeByteSRAM_GB(sramAddress, myFile.read());
}
}
// Disable SRAM
writeByte_GB(0x0000, 0x00);
// Close the file:
myFile.close();
display_Clear();
println_Msg(F("SRAM writing finished"));
display_Update();
}
else {
print_Error(F("File doesnt exist"), false);
}
}
else {
print_Error(F("Cart has no SRAM"), false);
}
}
// Check if the SRAM was written without any error
unsigned long verifySRAM_GB() {
//open file on sd card
if (myFile.open(filePath, O_READ)) {
// Variable for errors
writeErrors = 0;
// MBC2 Fix
readByte_GB(0x0134);
// Check SRAM size
if (lastByte > 0) {
if (romType <= 4) { // MBC1
writeByte_GB(0x6000, 1); // Set RAM Mode
}
// Initialise MBC
writeByte_GB(0x0000, 0x0A);
// Switch SRAM banks
for (byte currBank = 0; currBank < sramBanks; currBank++) {
writeByte_GB(0x4000, currBank);
// Read SRAM
for (word sramAddress = 0xA000; sramAddress <= lastByte; sramAddress += 64) {
//fill sdBuffer
myFile.read(sdBuffer, 64);
for (int c = 0; c < 64; c++) {
if (readByteSRAM_GB(sramAddress + c) != sdBuffer[c]) {
writeErrors++;
}
}
}
}
// Disable RAM
writeByte_GB(0x0000, 0x00);
}
// Close the file:
myFile.close();
return writeErrors;
}
else {
print_Error(F("Can't open file"), true);
}
}
/******************************************
29F016/29F032/29F033 flashrom functions
*****************************************/
// Write 29F032 flashrom
// A0-A13 directly connected to cart edge -> 16384(0x0-0x3FFF) bytes per bank -> 256(0x0-0xFF) banks
// A14-A21 connected to MBC5
void writeFlash29F_GB(byte MBC, boolean flashErase) {
// Launch filebrowser
filePath[0] = '\0';
sd.chdir("/");
fileBrowser(F("Select file"));
display_Clear();
// Create filepath
sprintf(filePath, "%s/%s", filePath, fileName);
// Open file on sd card
if (myFile.open(filePath, O_READ)) {
// Get rom size from file
myFile.seekCur(0x147);
romType = myFile.read();
romSize = myFile.read();
// Go back to file beginning
myFile.seekSet(0);
// ROM banks
switch (romSize) {
case 0x00:
romBanks = 2;
break;
case 0x01:
romBanks = 4;
break;
case 0x02:
romBanks = 8;
break;
case 0x03:
romBanks = 16;
break;
case 0x04:
romBanks = 32;
break;
case 0x05:
romBanks = 64;
break;
case 0x06:
romBanks = 128;
break;
case 0x07:
romBanks = 256;
break;
default:
romBanks = 2;
}
// Set ROM bank hi 0
writeByte_GB(0x3000, 0);
// Set ROM bank low 0
writeByte_GB(0x2000, 0);
delay(100);
// Reset flash
writeByte_GB(0x555, 0xf0);
delay(100);
// ID command sequence
writeByte_GB(0x555, 0xaa);
writeByte_GB(0x2aa, 0x55);
writeByte_GB(0x555, 0x90);
// Read the two id bytes into a string
sprintf(flashid, "%02X%02X", readByte_GB(0), readByte_GB(1));
if (strcmp(flashid, "04D4") == 0) {
println_Msg(F("MBM29F033C"));
print_Msg(F("Banks: "));
print_Msg(romBanks);
println_Msg(F("/256"));
display_Update();
}
else if (strcmp(flashid, "0141") == 0) {
println_Msg(F("AM29F032B"));
print_Msg(F("Banks: "));
print_Msg(romBanks);
println_Msg(F("/256"));
display_Update();
}
else if (strcmp(flashid, "01AD") == 0) {
println_Msg(F("AM29F016B"));
print_Msg(F("Banks: "));
print_Msg(romBanks);
println_Msg(F("/128"));
display_Update();
}
else if (strcmp(flashid, "04AD") == 0) {
println_Msg(F("AM29F016D"));
print_Msg(F("Banks: "));
print_Msg(romBanks);
println_Msg(F("/128"));
display_Update();
}
else if (strcmp(flashid, "01D5") == 0) {
println_Msg(F("AM29F080B"));
print_Msg(F("Banks: "));
print_Msg(romBanks);
println_Msg(F("/64"));
display_Update();
}
else {
print_Msg(F("Flash ID: "));
println_Msg(flashid);
display_Update();
print_Error(F("Unknown flashrom"), true);
}
// Reset flash
writeByte_GB(0x555, 0xf0);
delay(100);
if (flashErase) {
println_Msg(F("Erasing flash"));
display_Update();
// Erase flash
writeByte_GB(0x555, 0xaa);
writeByte_GB(0x2aa, 0x55);
writeByte_GB(0x555, 0x80);
writeByte_GB(0x555, 0xaa);
writeByte_GB(0x2aa, 0x55);
writeByte_GB(0x555, 0x10);
// Read the status register
byte statusReg = readByte_GB(0);
// After a completed erase D7 will output 1
while ((statusReg & 0x80) != 0x80) {
// Update Status
statusReg = readByte_GB(0);
}
// Blankcheck
println_Msg(F("Blankcheck"));
display_Update();
// Read x number of banks
for (int currBank = 0; currBank < romBanks; currBank++) {
// Blink led
blinkLED();
// Set ROM bank
writeByte_GB(0x2000, currBank);
for (unsigned int currAddr = 0x4000; currAddr < 0x7FFF; currAddr += 512) {
for (int currByte = 0; currByte < 512; currByte++) {
sdBuffer[currByte] = readByte_GB(currAddr + currByte);
}
for (int j = 0; j < 512; j++) {
if (sdBuffer[j] != 0xFF) {
println_Msg(F("Not empty"));
print_Error(F("Erase failed"), true);
}
}
}
}
}
if (MBC == 3) {
println_Msg(F("Writing flash MBC3"));
display_Update();
// Write flash
word currAddr = 0;
word endAddr = 0x3FFF;
//Initialize progress bar
uint32_t processedProgressBar = 0;
uint32_t totalProgressBar = (uint32_t)(romBanks) * 16384;
draw_progressbar(0, totalProgressBar);
for (int currBank = 0; currBank < romBanks; currBank++) {
// Blink led
blinkLED();
// Set ROM bank
writeByte_GB(0x2100, currBank);
if (currBank > 0) {
currAddr = 0x4000;
endAddr = 0x7FFF;
}
while (currAddr <= endAddr) {
myFile.read(sdBuffer, 512);
for (int currByte = 0; currByte < 512; currByte++) {
// Write command sequence
writeByte_GB(0x555, 0xaa);
writeByte_GB(0x2aa, 0x55);
writeByte_GB(0x555, 0xa0);
// Write current byte
writeByte_GB(currAddr + currByte, sdBuffer[currByte]);
// Set OE/RD(PH6) LOW
PORTH &= ~(1 << 6);
// Busy check
while ((PINC & 0x80) != (sdBuffer[currByte] & 0x80)) {
}
// Switch OE/RD(PH6) to HIGH
PORTH |= (1 << 6);
}
currAddr += 512;
processedProgressBar += 512;
draw_progressbar(processedProgressBar, totalProgressBar);
}
}
}
else if (MBC == 5) {
println_Msg(F("Writing flash MBC5"));
display_Update();
// Write flash
//Initialize progress bar
uint32_t processedProgressBar = 0;
uint32_t totalProgressBar = (uint32_t)(romBanks) * 16384;
draw_progressbar(0, totalProgressBar);
for (int currBank = 0; currBank < romBanks; currBank++) {
// Blink led
blinkLED();
// Set ROM bank
writeByte_GB(0x2000, currBank);
// 0x2A8000 fix
writeByte_GB(0x4000, 0x0);
for (unsigned int currAddr = 0x4000; currAddr < 0x7FFF; currAddr += 512) {
myFile.read(sdBuffer, 512);
for (int currByte = 0; currByte < 512; currByte++) {
// Write command sequence
writeByte_GB(0x555, 0xaa);
writeByte_GB(0x2aa, 0x55);
writeByte_GB(0x555, 0xa0);
// Write current byte
writeByte_GB(currAddr + currByte, sdBuffer[currByte]);
// Set OE/RD(PH6) LOW
PORTH &= ~(1 << 6);
// Busy check
while ((PINC & 0x80) != (sdBuffer[currByte] & 0x80)) {
}
// Switch OE/RD(PH6) to HIGH
PORTH |= (1 << 6);
}
processedProgressBar += 512;
draw_progressbar(processedProgressBar, totalProgressBar);
}
}
}
print_Msg(F("Verifying..."));
display_Update();
// Go back to file beginning
myFile.seekSet(0);
//unsigned int addr = 0; // unused
writeErrors = 0;
// Verify flashrom
word romAddress = 0;
// Read number of banks and switch banks
for (word bank = 1; bank < romBanks; bank++) {
if (romType >= 5) { // MBC2 and above
writeByte_GB(0x2100, bank); // Set ROM bank
}
else { // MBC1
writeByte_GB(0x6000, 0); // Set ROM Mode
writeByte_GB(0x4000, bank >> 5); // Set bits 5 & 6 (01100000) of ROM bank
writeByte_GB(0x2000, bank & 0x1F); // Set bits 0 & 4 (00011111) of ROM bank
}
if (bank > 1) {
romAddress = 0x4000;
}
// Blink led
blinkLED();
// Read up to 7FFF per bank
while (romAddress <= 0x7FFF) {
// Fill sdBuffer
myFile.read(sdBuffer, 512);
// Compare
for (int i = 0; i < 512; i++) {
if (readByte_GB(romAddress + i) != sdBuffer[i]) {
writeErrors++;
}
}
romAddress += 512;
}
}
// Close the file:
myFile.close();
if (writeErrors == 0) {
println_Msg(F("OK"));
display_Update();
}
else {
println_Msg(F("Error"));
print_Msg(writeErrors);
println_Msg(F(" bytes "));
print_Error(F("did not verify."), true);
}
}
else {
println_Msg(F("Can't open file"));
display_Update();
}
}
/******************************************
CFU flashrom functions
*****************************************/
/*
Flash chips can either be in x8 mode or x16 mode and sometimes the two
least significant bits on flash cartridges' data lines are swapped.
This function reads a byte and compensates for the differences.
This is only necessary for commands to the flash, not for data read from the flash, the MBC or SRAM.
address needs to be the x8 mode address of the flash register that should be read.
*/
byte readByteCompensated(int address) {
byte data = readByte_GB(address >> (flashX16Mode ? 1 : 0));
if (flashSwitchLastBits) {
return (data & 0b11111100) | ((data << 1) & 0b10) | ((data >> 1) & 0b01);
}
return data;
}
/*
Flash chips can either be in x8 mode or x16 mode and sometimes the two
least significant bits on flash cartridges' data lines are swapped.
This function writes a byte and compensates for the differences.
This is only necessary for commands to the flash, not for data written to the flash, the MBC or SRAM.
.
address needs to be the x8 mode address of the flash register that should be read.
*/
byte writeByteCompensated(int address, byte data) {
if (flashSwitchLastBits) {
data = (data & 0b11111100) | ((data << 1) & 0b10) | ((data >> 1) & 0b01);
}
writeByte_GB(address >> (flashX16Mode ? 1 : 0), data);
}
void startCFIMode(boolean x16Mode) {
if (x16Mode) {
writeByte_GB(0x555, 0xf0); //x16 mode reset command
delay(500);
writeByte_GB(0x555, 0xf0); //Double reset to get out of possible Autoselect + CFI mode
delay(500);
writeByte_GB(0x55, 0x98); //x16 CFI Query command
} else {
writeByte_GB(0xAAA, 0xf0); //x8 mode reset command
delay(100);
writeByte_GB(0xAAA, 0xf0); //Double reset to get out of possible Autoselect + CFI mode
delay(100);
writeByte_GB(0xAA, 0x98); //x8 CFI Query command
}
}
/* Identify the different flash chips.
Sets the global variables flashBanks, flashX16Mode and flashSwitchLastBits
*/
void identifyCFI_GB() {
// Reset flash
display_Clear();
writeByte_GB(0x6000, 0); // Set ROM Mode
writeByte_GB(0x2000, 0); // Set Bank to 0
writeByte_GB(0x3000, 0);
startCFIMode(false); // Trying x8 mode first
display_Clear();
// Try x8 mode first
char cfiQRYx8[7];
char cfiQRYx16[7];
sprintf(cfiQRYx8, "%02X%02X%02X", readByte_GB(0x20), readByte_GB(0x22), readByte_GB(0x24));
sprintf(cfiQRYx16, "%02X%02X%02X", readByte_GB(0x10), readByte_GB(0x11), readByte_GB(0x12)); // some devices use x8-style CFI Query command even though they are in x16 command mode
if (strcmp(cfiQRYx8, "515259") == 0) { // QRY in x8 mode
println_Msg(F("Normal CFI x8 Mode"));
flashX16Mode = false;
flashSwitchLastBits = false;
} else if (strcmp(cfiQRYx8, "52515A") == 0) { // QRY in x8 mode with switched last bit
println_Msg(F("Switched CFI x8 Mode"));
flashX16Mode = false;
flashSwitchLastBits = true;
} else if (strcmp(cfiQRYx16, "515259") == 0) { // QRY in x16 mode
println_Msg(F("Normal CFI x16 Mode"));
flashX16Mode = true;
flashSwitchLastBits = false;
} else if (strcmp(cfiQRYx16, "52515A") == 0) { // QRY in x16 mode with switched last bit
println_Msg(F("Switched CFI x16 Mode"));
flashX16Mode = true;
flashSwitchLastBits = true;
} else {
startCFIMode(true); // Try x16 mode next
sprintf(cfiQRYx16, "%02X%02X%02X", readByte_GB(0x10), readByte_GB(0x11), readByte_GB(0x12));
if (strcmp(cfiQRYx16, "515259") == 0) { // QRY in x16 mode
println_Msg(F("Normal CFI x16 Mode"));
flashX16Mode = true;
flashSwitchLastBits = false;
} else if (strcmp(cfiQRYx16, "52515A") == 0) { // QRY in x16 mode with switched last bit
println_Msg(F("Switched CFI x16 Mode"));
flashX16Mode = true;
flashSwitchLastBits = true;
} else {
println_Msg(F("CFI Query failed!"));
display_Update();
wait();
return;
}
}
flashBanks = 1 << (readByteCompensated(0x4E) - 14); // - flashX16Mode);
// Reset flash
writeByteCompensated(0xAAA, 0xf0);
delay(100);
}
// Write 29F032 flashrom
// A0-A13 directly connected to cart edge -> 16384(0x0-0x3FFF) bytes per bank -> 256(0x0-0xFF) banks
// A14-A21 connected to MBC5
// identifyFlash_GB() needs to be run before this!
bool writeCFI_GB() {
// Create filepath
sprintf(filePath, "%s/%s", filePath, fileName);
// Open file on sd card
if (myFile.open(filePath, O_READ)) {
// Get rom size from file
myFile.seekCur(0x147);
romType = myFile.read();
romSize = myFile.read();
// Go back to file beginning
myFile.seekSet(0);
// ROM banks
switch (romSize) {
case 0x00:
romBanks = 2;
break;
case 0x01:
romBanks = 4;
break;
case 0x02:
romBanks = 8;
break;
case 0x03:
romBanks = 16;
break;
case 0x04:
romBanks = 32;
break;
case 0x05:
romBanks = 64;
break;
case 0x06:
romBanks = 128;
break;
case 0x07:
romBanks = 256;
break;
default:
romBanks = 2;
}
if (romBanks <= flashBanks) {
print_Msg(F("Using "));
print_Msg(romBanks);
print_Msg(F("/"));
print_Msg(flashBanks);
println_Msg(F(" Banks"));
display_Update();
} else {
println_Msg(F("Error: Flash has too few banks!"));
print_Msg(F("Has "));
print_Msg(flashBanks);
println_Msg(F(" banks,"));
print_Msg(F("but needs "));
print_Msg(romBanks);
println_Msg(F("."));
println_Msg(F("Press Button..."));
display_Update();
wait();
resetArduino();
}
// Set ROM bank hi 0
writeByte_GB(0x3000, 0);
// Set ROM bank low 0
writeByte_GB(0x2000, 0);
delay(100);
// Reset flash
writeByteCompensated(0xAAA, 0xf0);
delay(100);
// Reset flash
writeByte_GB(0x555, 0xf0);
delay(100);
println_Msg(F("Erasing flash"));
display_Update();
// Erase flash
writeByteCompensated(0xAAA, 0xaa);
writeByteCompensated(0x555, 0x55);
writeByteCompensated(0xAAA, 0x80);
writeByteCompensated(0xAAA, 0xaa);
writeByteCompensated(0x555, 0x55);
writeByteCompensated(0xAAA, 0x10);
// Read the status register
byte statusReg = readByte_GB(0);
// After a completed erase D7 will output 1
while ((statusReg & 0x80) != 0x80) {
// Blink led
blinkLED();
delay(100);
// Update Status
statusReg = readByte_GB(0);
}
// Blankcheck
println_Msg(F("Blankcheck"));
display_Update();
// Read x number of banks
for (int currBank = 0; currBank < romBanks; currBank++) {
// Blink led
blinkLED();
// Set ROM bank
writeByte_GB(0x2000, currBank);
for (unsigned int currAddr = 0x4000; currAddr < 0x7FFF; currAddr += 512) {
for (int currByte = 0; currByte < 512; currByte++) {
sdBuffer[currByte] = readByte_GB(currAddr + currByte);
}
for (int j = 0; j < 512; j++) {
if (sdBuffer[j] != 0xFF) {
println_Msg(F("Not empty"));
print_Error(F("Erase failed"), true);
}
}
}
}
println_Msg(F("Writing flash MBC3/5"));
display_Update();
// Write flash
word currAddr = 0;
word endAddr = 0x3FFF;
for (int currBank = 0; currBank < romBanks; currBank++) {
// Blink led
blinkLED();
// Set ROM bank
writeByte_GB(0x2100, currBank);
// 0x2A8000 fix
writeByte_GB(0x4000, 0x0);
if (currBank > 0) {
currAddr = 0x4000;
endAddr = 0x7FFF;
}
while (currAddr <= endAddr) {
myFile.read(sdBuffer, 512);
for (int currByte = 0; currByte < 512; currByte++) {
// Write command sequence
writeByteCompensated(0xAAA, 0xaa);
writeByteCompensated(0x555, 0x55);
writeByteCompensated(0xAAA, 0xa0);
// Write current byte
writeByte_GB(currAddr + currByte, sdBuffer[currByte]);
// Setting CS(PH3) and OE/RD(PH6) LOW
PORTH &= ~((1 << 3) | (1 << 6));
// Busy check
short i = 0;
while ((PINC & 0x80) != (sdBuffer[currByte] & 0x80)) {
i++;
if (i > 500) {
if (currAddr < 0x4000) { // This happens when trying to flash an MBC5 as if it was an MBC3. Retry to flash as MBC5, starting from last successfull byte.
currByte--;
currAddr += 0x4000;
endAddr = 0x7FFF;
break;
} else { // If a timeout happens while trying to flash MBC5-style, flashing failed.
return false;
}
}
}
// Switch CS(PH3) and OE/RD(PH6) to HIGH
PORTH |= (1 << 3) | (1 << 6);
__asm__("nop\n\tnop\n\tnop\n\t"); // Waste a few CPU cycles to remove write errors
}
currAddr += 512;
}
}
display_Clear();
println_Msg(F("Verifying"));
display_Update();
// Go back to file beginning
myFile.seekSet(0);
//unsigned int addr = 0; // unused
writeErrors = 0;
// Verify flashrom
word romAddress = 0;
// Read number of banks and switch banks
for (word bank = 1; bank < romBanks; bank++) {
if (romType >= 5) { // MBC2 and above
writeByte_GB(0x2100, bank); // Set ROM bank
}
else { // MBC1
writeByte_GB(0x6000, 0); // Set ROM Mode
writeByte_GB(0x4000, bank >> 5); // Set bits 5 & 6 (01100000) of ROM bank
writeByte_GB(0x2000, bank & 0x1F); // Set bits 0 & 4 (00011111) of ROM bank
}
if (bank > 1) {
romAddress = 0x4000;
}
// Blink led
blinkLED();
// Read up to 7FFF per bank
while (romAddress <= 0x7FFF) {
// Fill sdBuffer
myFile.read(sdBuffer, 512);
// Compare
for (int i = 0; i < 512; i++) {
if (readByte_GB(romAddress + i) != sdBuffer[i]) {
writeErrors++;
}
}
romAddress += 512;
}
}
// Close the file:
myFile.close();
if (writeErrors == 0) {
println_Msg(F("OK"));
display_Update();
}
else {
print_Msg(F("Error: "));
print_Msg(writeErrors);
println_Msg(F(" bytes "));
print_Error(F("did not verify."), false);
}
}
else {
println_Msg(F("Can't open file"));
display_Update();
}
return true;
}
#endif
//******************************************
// End of File
//******************************************
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