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retrode SMS plugin support, SMS cart size detection

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This commit is contained in:
jiyunomegami 2020-10-18 02:11:34 +09:00
parent d7a133188d
commit 1e3833fe8d
1 changed files with 66 additions and 15 deletions
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79
Cart_Reader/SMS.ino
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@ -16,12 +16,13 @@
static const char SMSMenuItem1[] PROGMEM = "Read Rom";
static const char SMSMenuItem2[] PROGMEM = "Read from SRAM";
static const char SMSMenuItem3[] PROGMEM = "Write to SRAM";
static const char SMSMenuItem4[] PROGMEM = "Toggle Retrode Mode";
static const char SMSMenuItem4[] PROGMEM = "Change Retrode Mode";
static const char SMSMenuItem5[] PROGMEM = "Reset";
static const char* const menuOptionsSMS[] PROGMEM = {SMSMenuItem1, SMSMenuItem2, SMSMenuItem3, SMSMenuItem4, SMSMenuItem5};
// Set retrode_mode to true when using a retrode SMS/GG adapter
static bool retrode_mode = false;
static bool retrode_mode_sms = false; // true: SMS/Mark3 false: GG
void _smsMenu() {
// create menu with title and 2 options to choose from
@ -29,7 +30,7 @@ void _smsMenu() {
// Copy menuOptions out of progmem
int noptions = sizeof(menuOptionsSMS) / sizeof(menuOptionsSMS[0]);
convertPgm(menuOptionsSMS, noptions);
mainMenu = question_box(retrode_mode ? F("SMS/GG Retrode:YES") : F("SMS/GG Retrode:NO"), menuOptions, noptions, 0);
mainMenu = question_box(retrode_mode ? (retrode_mode_sms ? F("Retrode:SMS") : F("Retrode:GG")) : F("SMS/GG Retrode:NO"), menuOptions, noptions, 0);
// wait for user choice to come back from the question box menu
switch (mainMenu)
@ -62,7 +63,17 @@ void _smsMenu() {
break;
case 3:
retrode_mode = !retrode_mode;
if (!retrode_mode && !retrode_mode_sms) {
// first state (default)
retrode_mode = true; // Change to GG
} else if (retrode_mode && !retrode_mode_sms) {
// second state
retrode_mode_sms = true; // Change to SMS
} else {
// third state, reset to the first state
retrode_mode = false;
retrode_mode_sms = false;
}
break;
case 4:
@ -70,7 +81,7 @@ void _smsMenu() {
resetArduino();
break;
}
println_Msg(retrode_mode ? F("Retrode Mode On") : F("Retrode Mode Off"));
println_Msg(retrode_mode ? (retrode_mode_sms ? F("Retrode Mode SMS") : F("Retrode Mode GG")) : F("Retrode Mode Off"));
println_Msg(F(""));
println_Msg(F("Press Button..."));
display_Update();
@ -145,7 +156,7 @@ void setup_SMS() {
Low level functions
*****************************************/
void writeByte_SMS(word myAddress, byte myData) {
if (retrode_mode) {
if (retrode_mode && !retrode_mode_sms) {
// Set Data Pins (D8-D15) to Output
DDRA = 0xFF;
} else {
@ -162,7 +173,7 @@ void writeByte_SMS(word myAddress, byte myData) {
}
// Output data
if (retrode_mode) {
if (retrode_mode && !retrode_mode_sms) {
PORTA = myData;
} else {
PORTC = myData;
@ -198,7 +209,7 @@ void writeByte_SMS(word myAddress, byte myData) {
// Leave WR high for at least 50ns
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
if (retrode_mode) {
if (retrode_mode && !retrode_mode_sms) {
// Set Data Pins (D8-D15) to Input
DDRA = 0x00;
} else {
@ -208,7 +219,7 @@ void writeByte_SMS(word myAddress, byte myData) {
}
byte readByte_SMS(word myAddress) {
if (retrode_mode) {
if (retrode_mode && !retrode_mode_sms) {
// Set Data Pins (D8-D15) to Input
DDRA = 0x00;
} else {
@ -239,7 +250,7 @@ byte readByte_SMS(word myAddress) {
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t");
// Read
byte tempByte = retrode_mode ? PINA : PINC;
byte tempByte = (retrode_mode && !retrode_mode_sms) ? PINA : PINC;
if (retrode_mode) {
// Switch RD(PL6) and OE(PH6) to HIGH
@ -293,11 +304,7 @@ void getCartInfo_SMS() {
cartSize = 128 * 1024UL;
break;
case 0x0:
if (retrode_mode) {
cartSize = 512 * 1024UL;
} else {
cartSize = 256 * 1024UL;
}
break;
case 0x1:
cartSize = 512 * 1024UL;
@ -313,12 +320,41 @@ void getCartInfo_SMS() {
}
// Read TMR Sega string
// Read TMR SEGA string
for (byte i = 0; i < 8; i++) {
romName[i] = char(readByte_SMS(0x7ff0 + i));
}
romName[8] = '\0';
// Attempt to detect cart size by checking if TMR SEGA is mirrored
unsigned long mirror_offset = cartSize;
char romName2[9];
while (mirror_offset < 1024 * 1024UL) {
byte bank = 1 + (mirror_offset / (16 * 1024UL));
writeByte_SMS(0xFFFE, bank);
for (byte i = 0; i < 8; i++) {
romName2[i] = char(readByte_SMS(0x7ff0 + i));
}
romName2[8] = '\0';
// print_Msg(F("Name2: "));
// println_Msg(romName2);
// print_Msg(F("from bank "));
// print_Msg(bank);
// print_Msg(F(" offset "));
// print_Msg_PaddedHex32(mirror_offset + 0x7ff0);
// println_Msg(F(""));
if (strcmp(romName2, romName) == 0) {
break;
}
if (cartSize == 48 * 1024UL) {
cartSize = 64 * 1024UL;
} else {
cartSize *= 2;
}
mirror_offset = cartSize;
}
writeByte_SMS(0xFFFE, 1);
display_Clear();
println_Msg(F("Cart Info"));
println_Msg(F(" "));
@ -384,6 +420,21 @@ void readROM_SMS() {
for (int currByte = 0; currByte < 512; currByte++) {
sdBuffer[currByte] = readByte_SMS(0x8000 + currBuffer + currByte);
}
// hexdump for debugging:
// if (currBank == 0 && currBuffer == 0) {
// for (word xi = 0; xi < 0x100; xi++) {
// if (xi%16==0) {
// print_Msg_PaddedHex16(xi);
// print_Msg(F(" "));
// }
// print_Msg_PaddedHexByte(sdBuffer[xi]);
// if (xi>0&&((xi+1)%16)==0) {
// println_Msg(F(""));
// } else {
// print_Msg(F(" "));
// }
// }
// }
myFile.write(sdBuffer, 512);
}
}