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cartreader/Cart_Reader/2600.ino

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//******************************************
// ATARI 2600 MODULE
//******************************************
#if defined(ENABLE_2600)
// Atari 2600
// Cartridge Pinout
// 24P 2.54mm pitch connector
//
// LABEL SIDE
//
// GND +5V A8 A9 A11 A10 A12 D7 D6 D5 D4 D3
// +--------------------------------------------------+
// | 24 23 22 21 20 19 18 17 16 15 14 13 |
// LEFT | | RIGHT
// | 1 2 3 4 5 6 7 8 9 10 11 12 |
// +--------------------------------------------------+
// A7 A6 A5 A4 A3 A2 A1 A0 D0 D1 D2 GND
//
// BOTTOM SIDE
// Cart Configurations
// Format = {mapper,romsize}
static const byte PROGMEM a2600mapsize[] = {
0x04, 5, // Atari 32K with RAM (F4SC)
0x06, 4, // Atari 16K with RAM (F6SC)
0x08, 2, // Atari 8K with RAM (F8SC)
0x20, 0, // 2K
0x3F, 2, // Tigervision 8K
0x40, 1, // 4K [DEFAULT]
0xC0, 0, // "CV" Commavid 2K
0xD0, 2, // "DPC" Pitfall II 10K
0xE0, 2, // Parker Bros 8K
0xE7, 4, // M-Network 16K
0xF0, 6, // Megaboy 64K
0xF4, 5, // Atari 32K
0xF6, 4, // Atari 16K
0xF8, 2, // Atari 8K
0xFA, 3, // CBS RAM Plus 12K
0xFE, 2, // Activision 8K
0xF9, 2, // "TP" Time Pilot 8K
0x0A, 2, // "UA" UA Ltd 8K
};
byte a2600mapcount = (sizeof(a2600mapsize) / sizeof(a2600mapsize[0])) / 2;
byte a2600mapselect;
int a2600index;
byte a2600[] = { 2, 4, 8, 12, 16, 32, 64 };
byte a2600mapper = 0;
byte a2600size;
// EEPROM MAPPING
// 07 MAPPER
// 08 ROM SIZE
//******************************************
// Menu
//******************************************
// Base Menu
static const char a2600MenuItem3[] PROGMEM = "Set Mapper";
static const char* const menuOptions2600[] PROGMEM = { FSTRING_SELECT_CART, FSTRING_READ_ROM, a2600MenuItem3, FSTRING_RESET };
void setup_2600() {
// Request 5V
setVoltage(VOLTS_SET_5V);
// Set Address Pins to Output
// Atari 2600 uses A0-A12 [A13-A23 UNUSED]
//A0-A7
DDRF = 0xFF;
//A8-A15
DDRK = 0xFF;
//A16-A23
DDRL = 0xFF;
// Set Control Pins to Output [UNUSED]
// ---(PH0) ---(PH1) ---(PH3) ---(PH4) ---(PH5) ---(PH6)
DDRH |= (1 << 0) | (1 << 1) | (1 << 3) | (1 << 4) | (1 << 5) | (1 << 6);
// Set TIME(PJ0) to Output (UNUSED)
DDRJ |= (1 << 0);
// Set Pins (D0-D7) to Input
DDRC = 0x00;
// Setting Control Pins to HIGH [UNUSED]
// ---(PH0) ---(PH1) ---(PH3) ---(PH4) ---(PH5) ---(PH6)
PORTH |= (1 << 0) | (1 << 1) | (1 << 3) | (1 << 4) | (1 << 5) | (1 << 6);
// Set Unused Data Pins (PA0-PA7) to Output
DDRA = 0xFF;
// Set Unused Pins HIGH
PORTA = 0xFF;
PORTL = 0xFF; // A16-A23
PORTJ |= (1 << 0); // TIME(PJ0)
checkStatus_2600();
strcpy(romName, "ATARI");
mode = CORE_2600;
}
void a2600Menu() {
convertPgm(menuOptions2600, 4);
uint8_t mainMenu = question_box(F("ATARI 2600 MENU"), menuOptions, 4, 0);
switch (mainMenu) {
case 0:
// Select Cart
setCart_2600();
setup_2600();
break;
case 1:
// Read ROM
sd.chdir("/");
readROM_2600();
sd.chdir("/");
break;
case 2:
// Set Mapper
setMapper_2600();
checkStatus_2600();
break;
case 3:
// reset
resetArduino();
break;
}
}
//******************************************
// READ CODE
//******************************************
uint8_t readData_2600(uint16_t addr) // Add Input Pullup
{
PORTF = addr & 0xFF; // A0-A7
PORTK = (addr >> 8) & 0xFF; // A8-A12
NOP;
NOP;
NOP;
NOP;
NOP;
DDRC = 0x00; // Set to Input
PORTC = 0xFF; // Input Pullup
NOP;
NOP;
NOP;
NOP;
NOP;
uint8_t ret = PINC;
NOP;
NOP;
NOP;
NOP;
NOP;
return ret;
}
void readSegment_2600(uint16_t startaddr, uint16_t endaddr) {
for (uint16_t addr = startaddr; addr < endaddr; addr += 512) {
readDataArray_2600(addr, 512);
}
}
void readDataArray_2600(uint16_t addr, uint16_t size) {
for (int w = 0; w < size; w++) {
sdBuffer[w] = readData_2600(addr + w);
}
myFile.write(sdBuffer, size);
}
void readSegmentF8_2600(uint16_t startaddr, uint16_t endaddr, uint16_t bankaddr) {
for (uint16_t addr = startaddr; addr < endaddr; addr += 512) {
for (int w = 0; w < 512; w++) {
if (addr > 0x1FF9) // SET BANK ADDRESS FOR 0x1FFA-0x1FFF
readData_2600(bankaddr);
uint8_t temp = readData_2600(addr + w);
sdBuffer[w] = temp;
}
myFile.write(sdBuffer, 512);
}
}
void outputFF_2600(uint16_t size) {
memset(sdBuffer, 0xFF, size * sizeof(sdBuffer[0]));
myFile.write(sdBuffer, size);
}
void writeData_2600(uint16_t addr, uint8_t data) {
PORTF = addr & 0xFF; // A0-A7
PORTK = (addr >> 8) & 0xFF; // A8-A12
NOP;
NOP;
NOP;
NOP;
NOP;
DDRC = 0xFF; // Set to Output
NOP;
NOP;
NOP;
NOP;
NOP;
PORTC = data;
NOP;
NOP;
NOP;
NOP;
NOP;
DDRC = 0x00; // Reset to Input
}
void writeData3F_2600(uint16_t addr, uint8_t data) {
PORTF = addr & 0xFF; // A0-A7
PORTK = (addr >> 8) & 0xFF; // A8-A12
NOP;
NOP;
NOP;
NOP;
NOP;
DDRC = 0xFF; // Set to Output
NOP;
NOP;
NOP;
NOP;
NOP;
PORTC = data;
NOP;
NOP;
NOP;
NOP;
NOP;
// Address (0x1000);
PORTF = 0x00; // A0-A7
PORTK = 0x10; // A8-A12
NOP;
NOP;
NOP;
NOP;
NOP;
NOP;
NOP;
NOP;
DDRC = 0x00; // Reset to Input
}
// E7 Mapper Check - Check Bank for FFs
boolean checkE7(int bank) {
writeData_2600(0x1800, 0xFF);
readData_2600(0x1FE0 + bank);
uint32_t testdata = (readData_2600(0x1000) << 24) | (readData_2600(0x1001) << 16) | (readData_2600(0x1002) << 8) | (readData_2600(0x1003));
if (testdata == 0xFFFFFFFF)
return true;
else
return false;
}
void readROM_2600() {
byte e7size;
strcpy(fileName, romName);
strcat(fileName, ".a26");
// create a new folder for storing rom file
EEPROM_readAnything(0, foldern);
sprintf(folder, "ATARI/ROM/%d", foldern);
sd.mkdir(folder, true);
sd.chdir(folder);
display_Clear();
print_Msg(F("Saving to "));
print_Msg(folder);
println_Msg(F("/..."));
display_Update();
// open file on sdcard
if (!myFile.open(fileName, O_RDWR | O_CREAT))
print_FatalError(create_file_STR);
// write new folder number back to EEPROM
foldern++;
EEPROM_writeAnything(0, foldern);
// ROM Start 0xF000
// Address A12-A0 = 0x1000 = 1 0000 0000 0000 = 4KB
// Read Start 0x1000
switch (a2600mapper) {
case 0x20: // 2K Standard 2KB
readSegment_2600(0x1000, 0x1800);
break;
case 0x3F: // 3F Mapper 8KB
for (int x = 0; x < 0x3; x++) {
writeData3F_2600(0x3F, x);
readSegment_2600(0x1000, 0x1800);
}
readSegment_2600(0x1800, 0x2000);
break;
case 0x40: // 4K Default 4KB
readSegment_2600(0x1000, 0x2000);
break;
case 0xC0: // CV Mapper 2KB
readSegment_2600(0x1800, 0x2000);
break;
case 0xD0: // DPC Mapper 10KB
// 8K ROM
for (int x = 0; x < 0x2; x++) {
readData_2600(0x1FF8 + x);
// Split Read of 1st 0x200 bytes
// 0x0000-0x0080 are DPC Registers (Random on boot)
outputFF_2600(0x80); // Output 0xFFs for Registers
readDataArray_2600(0x1080, 0x180);
// Read Segment
readSegment_2600(0x1200, 0x1800);
// 0x1000-0x1080 are DPC Registers (Random on boot)
outputFF_2600(0x80); // Output 0xFFs for Registers
readDataArray_2600(0x1880, 0x180);
// Read Segment
readSegment_2600(0x1A00, 0x1E00);
// Split Read of Last 0x200 bytes
readDataArray_2600(0x1E00, 0x1F8);
for (int z = 0; z < 8; z++) {
// Set Bank to ensure 0x1FFA-0x1FFF is correct
readData_2600(0x1FF8 + x);
sdBuffer[z] = readData_2600(0x1FF8 + z);
}
myFile.write(sdBuffer, 8);
}
// 2K DPC Internal Graphics ROM
// Read Registers 0x1008-0x100F (Graphics 0x1008-0x100C)
// Write Registers LSB 0x1050-0x1057 AND MSB 0x1058-0x105F
// Set Data Fetcher 0 Limits
writeData_2600(0x1040, 0xFF); // MAX for Data Fetcher 0
writeData_2600(0x1048, 0x00); // MIN for Data Fetcher 0
// Set Data Fetcher 0 Counter (0x7FF)
writeData_2600(0x1050, 0xFF); // LSB for Data Fetcher 0
writeData_2600(0x1058, 0x07); // MSB for Data Fetcher 0
// Set Data Fetcher 1 Counter (0x7FF)
writeData_2600(0x1051, 0xFF); // LSB for Data Fetcher 1
writeData_2600(0x1059, 0x07); // MSB for Data Fetcher 1
for (int x = 0; x < 0x800; x += 512) {
for (int y = 0; y < 512; y++) {
sdBuffer[y] = readData_2600(0x1008); // Data Fetcher 0
readData_2600(0x1009); // Data Fetcher 1
}
myFile.write(sdBuffer, 512);
}
break;
case 0xE0: // E0 Mapper 8KB
for (int x = 0; x < 0x7; x++) {
readData_2600(0x1FE0 + x);
readSegment_2600(0x1000, 0x1400);
}
readSegment_2600(0x1C00, 0x2000);
break;
case 0xE7: // E7 Mapper 8KB/12KB/16KB
// Check Bank 0 - If 0xFFs then Bump 'n' Jump
if (checkE7(0)) { // Bump 'n' Jump 8K
writeData_2600(0x1800, 0xFF);
for (int x = 4; x < 7; x++) { // Banks 4-6
readData_2600(0x1FE0 + x);
readSegment_2600(0x1000, 0x1800);
}
e7size = 0;
}
// Check Bank 3 - If 0xFFs then BurgerTime
else if (checkE7(3)) { // BurgerTime 12K
writeData_2600(0x1800, 0xFF);
for (int x = 0; x < 2; x++) { // Banks 0+1
readData_2600(0x1FE0 + x);
readSegment_2600(0x1000, 0x1800);
}
for (int x = 4; x < 7; x++) { // Banks 4-6
readData_2600(0x1FE0 + x);
readSegment_2600(0x1000, 0x1800);
}
e7size = 1;
}
else { // Masters of the Universe (or Unknown Cart) 16K
writeData_2600(0x1800, 0xFF);
for (int x = 0; x < 7; x++) { // Banks 0-6
readData_2600(0x1FE0 + x);
readSegment_2600(0x1000, 0x1800);
}
e7size = 2;
}
readSegment_2600(0x1800, 0x2000); // Bank 7
break;
case 0xF0: // F0 Mapper 64KB
for (int x = 0; x < 0x10; x++) {
readData_2600(0x1FF0);
readSegment_2600(0x1000, 0x2000);
}
break;
case 0x04: // F4SC Mapper 32KB \w RAM
case 0xF4: // F4 Mapper 32KB
for (int x = 0; x < 8; x++) {
readData_2600(0x1FF4 + x);
if(a2600mapper == 0xF4) {
readSegment_2600(0x1000, 0x1200);
} else {
outputFF_2600(0x100); // Skip 0x1000-0x10FF RAM
readDataArray_2600(0x1100, 0x100);
}
readSegment_2600(0x1200, 0x1E00);
// Split Read of Last 0x200 bytes
readDataArray_2600(0x1E00, 0x1F4);
for (int z = 0; z < 12; z++) {
// Set Bank to ensure 0x1FFC-0x1FFF is correct
readData_2600(0x1FF4 + x);
sdBuffer[z] = readData_2600(0x1FF4 + z);
}
myFile.write(sdBuffer, 12);
}
break;
case 0x06: // F6SC Mapper 16KB \w RAM
case 0xF6: // F6 Mapper 16KB
for (int w = 0; w < 4; w++) {
readData_2600(0x1FF6 + w);
if(a2600mapper == 0xF6) {
readSegment_2600(0x1000, 0x1200);
} else {
outputFF_2600(0x100); // Skip 0x1000-0x10FF RAM
readDataArray_2600(0x1100, 0x100);
}
readSegment_2600(0x1200, 0x1E00);
// Split Read of Last 0x200 bytes
readDataArray_2600(0x1E00, 0x1F6);
// Bank Registers 0x1FF6-0x1FF9
for (int y = 0; y < 4; y++){
readData_2600(0x1FFF); // Reset Bank
sdBuffer[y] = readData_2600(0x1FF6 + y);
}
// End of Bank 0x1FFA-0x1FFF
readData_2600(0x1FFF); // Reset Bank
readData_2600(0x1FF6 + w); // Set Bank
for (int z = 4; z < 10; z++) {
sdBuffer[z] = readData_2600(0x1FF6 + z); // 0x1FFA-0x1FFF
}
myFile.write(sdBuffer, 10);
}
readData_2600(0x1FFF); // Reset Bank
break;
case 0x08: // F8SC Mapper 8KB \w RAM
case 0xF8: // F8 Mapper 8KB
for (int w = 0; w < 2; w++) {
readData_2600(0x1FF8 + w);
if(a2600mapper == 0xF8) {
readSegment_2600(0x1000, 0x1200);
} else {
outputFF_2600(0x100); // Skip 0x1000-0x10FF RAM
readDataArray_2600(0x1100, 0x100);
}
readSegment_2600(0x1200, 0x1E00);
// Split Read of Last 0x200 bytes
readDataArray_2600(0x1E00, 0x1F8);
// Bank Registers 0x1FF8-0x1FF9
for (int y = 0; y < 2; y++){
readData_2600(0x1FFF); // Reset Bank
sdBuffer[y] = readData_2600(0x1FF8 + y);
}
// End of Bank 0x1FFA-0x1FFF
readData_2600(0x1FFF); // Reset Bank
readData_2600(0x1FF8 + w); // Set Bank
for (int z = 2; z < 8; z++) {
sdBuffer[z] = readData_2600(0x1FF8 + z); // 0x1FFA-0x1FFF
}
myFile.write(sdBuffer, 8);
}
readData_2600(0x1FFF); // Reset Bank
break;
case 0xF9: // Time Pilot Mapper 8KB
// Bad implementation of the F8 Mapper
// kevtris swapped the bank order - swapped banks may not match physical ROM data
// Bankswitch code uses 0x1FFC and 0x1FF9
for (int w = 3; w >= 0; w -= 3) {
readData_2600(0x1FF9 + w);
readSegment_2600(0x1000, 0x1E00);
// Split Read of Last 0x200 bytes
readDataArray_2600(0x1E00, 0x1F9);
readData_2600(0x1FFF); // Reset Bank
sdBuffer[0] = readData_2600(0x1FF9);
// End of Bank 0x1FFA-0x1FFF
readData_2600(0x1FFF); // Reset Bank
readData_2600(0x1FF9 + w); // Set Bank
for (int z = 1; z < 7; z++) {
sdBuffer[z] = readData_2600(0x1FF9 + z); // 0x1FFA-0x1FFF
}
myFile.write(sdBuffer, 7);
}
// Reset Bank
readData_2600(0x1FF9);
readData_2600(0x1FFF);
readData_2600(0x1FFC);
break;
case 0xFA: // FA Mapper 12KB
for (int x = 0; x < 0x3; x++) {
writeData_2600(0x1FF8 + x, 0x1); // Set Bank with D0 HIGH
readSegment_2600(0x1000, 0x1E00);
// Split Read of Last 0x200 bytes
readDataArray_2600(0x1E00, 0x1F8);
for (int z = 0; z < 8; z++) {
// Set Bank to ensure 0x1FFB-0x1FFF is correct
writeData_2600(0x1FF8 + x, 0x1); // Set Bank with D0 HIGH
sdBuffer[z] = readData_2600(0x1FF8 + z);
}
myFile.write(sdBuffer, 8);
}
break;
case 0xFE: // FE Mapper 8KB
for (int x = 0; x < 0x2; x++) {
writeData_2600(0x01FE, 0xF0 ^ (x << 5));
writeData_2600(0x01FF, 0xF0 ^ (x << 5));
readSegment_2600(0x1000, 0x2000);
}
break;
case 0x0A: // UA Mapper 8KB
readData_2600(0x220);
readSegment_2600(0x1000, 0x2000);
readData_2600(0x240);
readSegment_2600(0x1000, 0x2000);
break;
}
myFile.close();
printCRC(fileName, NULL, 0);
println_Msg(FS(FSTRING_EMPTY));
print_STR(press_button_STR, 1);
display_Update();
wait();
}
//******************************************
// ROM SIZE
//******************************************
void println_Mapper2600(byte mapper) {
#if (defined(ENABLE_OLED) || defined(ENABLE_LCD))
if (mapper == 0x04)
println_Msg(F("F4SC"));
else if (mapper == 0x06)
println_Msg(F("F6SC"));
else if (mapper == 0x08)
println_Msg(F("F8SC"));
else if (mapper == 0x20)
println_Msg(F("2K"));
else if (mapper == 0x40)
println_Msg(F("4K"));
else if (mapper == 0x0A)
println_Msg(F("UA"));
else if (mapper == 0xC0)
println_Msg(F("CV"));
else if (mapper == 0xD0)
println_Msg(F("DPC"));
else if (mapper == 0xF9)
println_Msg(F("TP"));
else
println_Msg(mapper, HEX);
#else
if (mapper == 0x04)
Serial.println(F("F4SC"));
else if (mapper == 0x06)
Serial.println(F("F6SC"));
else if (mapper == 0x08)
Serial.println(F("F8SC"));
else if (mapper == 0x20)
Serial.println(F("2K"));
else if (mapper == 0x40)
Serial.println(F("4K"));
else if (mapper == 0x0A)
Serial.println(F("UA"));
else if (mapper == 0xC0)
Serial.println(F("CV"));
else if (mapper == 0xD0)
Serial.println(F("DPC"));
else if (mapper == 0xF9)
Serial.println(F("TP"));
else
Serial.println(mapper, HEX);
#endif
}
void checkStatus_2600() {
EEPROM_readAnything(7, a2600mapper);
EEPROM_readAnything(8, a2600size);
if (a2600size > 6) {
a2600size = 1; // default 4KB
EEPROM_writeAnything(8, a2600size);
}
#if (defined(ENABLE_OLED) || defined(ENABLE_LCD))
display_Clear();
println_Msg(F("ATARI 2600 READER"));
println_Msg(FS(FSTRING_CURRENT_SETTINGS));
println_Msg(FS(FSTRING_EMPTY));
print_Msg(F("MAPPER: "));
println_Mapper2600(a2600mapper);
print_Msg(F("ROM SIZE: "));
if (a2600mapper == 0xD0)
print_Msg(F("10"));
else
print_Msg(a2600[a2600size]);
println_Msg(F("K"));
display_Update();
wait();
#else
Serial.print(F("MAPPER: "));
println_Mapper2600(a2600mapper);
Serial.print(F("ROM SIZE: "));
if (a2600mapper == 0xD0)
Serial.print(F("10"));
else
Serial.print(a2600[a2600size]);
Serial.println(F("K"));
Serial.println(FS(FSTRING_EMPTY));
#endif
}
//******************************************
// SET MAPPER
//******************************************
#if (defined(ENABLE_OLED) || defined(ENABLE_LCD))
void displayMapperSelect_2600(uint8_t index, boolean printInstructions) {
display_Clear();
print_Msg(F("Mapper: "));
a2600index = index * 2;
a2600mapselect = pgm_read_byte(a2600mapsize + a2600index);
println_Mapper2600(a2600mapselect);
if(printInstructions) {
println_Msg(FS(FSTRING_EMPTY));
#if defined(ENABLE_OLED)
print_STR(press_to_change_STR, 1);
print_STR(right_to_select_STR, 1);
#elif defined(ENABLE_LCD)
print_STR(rotate_to_change_STR, 1);
print_STR(press_to_select_STR, 1);
#endif
}
display_Update();
}
#endif
void setMapper_2600() {
byte new2600mapper;
#if (defined(ENABLE_OLED) || defined(ENABLE_LCD))
uint8_t b = 0;
int i = 0;
// Check Button Status
#if defined(ENABLE_OLED)
buttonVal1 = (PIND & (1 << 7)); // PD7
#elif defined(ENABLE_LCD)
boolean buttonVal1 = (PING & (1 << 2)); //PG2
#endif
if (buttonVal1 == LOW) { // Button Pressed
while (1) { // Scroll Mapper List
#if defined(ENABLE_OLED)
buttonVal1 = (PIND & (1 << 7)); // PD7
#elif defined(ENABLE_LCD)
buttonVal1 = (PING & (1 << 2)); //PG2
#endif
if (buttonVal1 == HIGH) { // Button Released
// Correct Overshoot
if (i == 0)
i = a2600mapcount - 1;
else
i--;
break;
}
displayMapperSelect_2600(i, false);
if (i == (a2600mapcount - 1))
i = 0;
else
i++;
delay(250);
}
}
b = 0;
displayMapperSelect_2600(i, true);
while (1) {
b = checkButton();
if (b == 2) { // Previous Mapper (doubleclick)
if (i == 0)
i = a2600mapcount - 1;
else
i--;
// Only update display after input because of slow LCD library
displayMapperSelect_2600(i, true);
}
if (b == 1) { // Next Mapper (press)
if (i == (a2600mapcount - 1))
i = 0;
else
i++;
// Only update display after input because of slow LCD library
displayMapperSelect_2600(i, true);
}
if (b == 3) { // Long Press - Execute (hold)
new2600mapper = a2600mapselect;
break;
}
}
display.setCursor(0, 56);
print_Msg(F("MAPPER "));
println_Mapper2600(new2600mapper);
println_Msg(F(" SELECTED"));
display_Update();
delay(1000);
#else
setmapper:
String newmap;
Serial.println(F("SUPPORTED MAPPERS:"));
Serial.println(F("0 = F4SC [Atari 32K \w RAM]"));
Serial.println(F("1 = F6SC [Atari 16K \w RAM]"));
Serial.println(F("2 = F8SC [Atari 8K \w RAM]"));
Serial.println(F("3 = 2K [Standard 2K]"));
Serial.println(F("4 = 3F [Tigervision]"));
Serial.println(F("5 = 4K [Standard 4K]"));
Serial.println(F("6 = CV [Commavid]"));
Serial.println(F("7 = DPC [Pitfall II]"));
Serial.println(F("8 = E0 [Parker Bros]"));
Serial.println(F("9 = E7 [M-Network]"));
Serial.println(F("10 = F0 [Megaboy]"));
Serial.println(F("11 = F4 [Atari 32K]"));
Serial.println(F("12 = F6 [Atari 16K]"));
Serial.println(F("13 = F8 [Atari 8K]"));
Serial.println(F("14 = FA [CBS RAM Plus]"));
Serial.println(F("15 = FE [Activision]"));
Serial.println(F("16 = TP [Time Pilot 8K]"));
Serial.println(F("17 = UA [UA Ltd]"));
Serial.print(F("Enter Mapper [0-17]: "));
while (Serial.available() == 0) {}
newmap = Serial.readStringUntil('\n');
Serial.println(newmap);
a2600index = newmap.toInt() * 2;
new2600mapper = pgm_read_byte(a2600mapsize + a2600index);
#endif
EEPROM_writeAnything(7, new2600mapper);
a2600mapper = new2600mapper;
a2600size = pgm_read_byte(a2600mapsize + a2600index + 1);
EEPROM_writeAnything(8, a2600size);
}
//******************************************
// CART SELECT CODE
//******************************************
void readDataLine_2600(FsFile& database, byte* gameMapper) {
// Read mapper with three ascii character and subtract 48 to convert to decimal
(*gameMapper) = ((database.read() - 48) * 100) + ((database.read() - 48) * 10) + (database.read() - 48);
// Skip rest of line
database.seekCur(2);
}
void setCart_2600() {
//go to root
sd.chdir();
byte gameMapper;
byte gameSize;
// Select starting letter
byte myLetter = starting_letter();
// Open database
if (myFile.open("2600.txt", O_READ)) {
seek_first_letter_in_database(myFile, myLetter);
if(checkCartSelection(myFile, &readDataLine_2600, &gameMapper)) {
EEPROM_writeAnything(7, gameMapper);
for (int i = 0; i < a2600mapcount; i++) {
a2600index = i * 2;
if (gameMapper == pgm_read_byte(a2600mapsize + a2600index)) {
a2600size = pgm_read_byte(a2600mapsize + a2600index + 1);
EEPROM_writeAnything(8, a2600size);
break;
}
}
}
} else {
print_FatalError(FS(FSTRING_DATABASE_FILE_NOT_FOUND));
}
}
#endif
//******************************************
// End of File
//******************************************
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