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Merge pull request #919 from smesgr9000/master

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Add support for Atari 7800 Bankset bank switch
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PsyK0p4T 2024-03-24 11:25:32 +01:00 committed by GitHub
commit 316f8ef2fd
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GPG Key ID: B5690EEEBB952194
1 changed files with 92 additions and 15 deletions
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107
Cart_Reader/7800.ino
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@ -44,6 +44,7 @@
// CONTROL PINS:
// CLK(PH1) - SNES CPUCLK
// R/W(PH6) - SNES /RD
// HALT(PH0) - SNES /RESET
//******************************************
// Supported Mappers
@ -58,9 +59,10 @@ static const byte PROGMEM a7800mapsize[] = {
4, 4, 4, // Double Dragon/Rampage 128K [78AC]
5, 3, 3, // Realsports Baseball/Tank Command/Tower Toppler/Waterski 64K [78S4]
6, 3, 3, // Karateka (PAL) 64K [78S4 Variant]
7, 1, 4, // Bankset switching
};
byte a7800mapcount = 7; // (sizeof(a7800mapsize) / sizeof(a7800mapsize[0])) / 3;
byte a7800mapcount = 8; // (sizeof(a7800mapsize) / sizeof(a7800mapsize[0])) / 3;
byte a7800mapselect;
int a7800index;
@ -96,7 +98,7 @@ void setup_7800() {
DDRL = 0xFF;
// Set Control Pins to Output
// ---(PH0) ---(PH3) ---(PH4) ---(PH5) R/W(PH6)
// HALT(PH0) ---(PH3) ---(PH4) ---(PH5) R/W(PH6)
DDRH |= (1 << 0) | (1 << 3) | (1 << 4) | (1 << 5) | (1 << 6);
// Set TIME(PJ0) to Output (UNUSED)
@ -106,7 +108,7 @@ void setup_7800() {
DDRC = 0x00;
// Setting Control Pins to HIGH
// ---(PH0) ---(PH3) ---(PH4) ---(PH5) R/W(PH6)
// HALT(PH0) ---(PH3) ---(PH4) ---(PH5) R/W(PH6)
PORTH |= (1 << 0) | (1 << 3) | (1 << 4) | (1 << 5) | (1 << 6);
// Set Unused Data Pins (PA0-PA7) to Output
@ -263,7 +265,32 @@ void writeData_7800(uint32_t addr, uint8_t data) {
NOP;
NOP;
NOP;
NOP;
NOP;
NOP;
NOP;
NOP;
NOP;
NOP;
NOP;
NOP;
NOP;
PORTH |= (1 << 6); // R/W(PH6) HIGH = READ
NOP;
NOP;
NOP;
NOP;
NOP;
NOP;
NOP;
NOP;
NOP;
NOP;
NOP;
NOP;
NOP;
NOP;
NOP;
DDRC = 0x00; // Reset to Input
}
@ -321,20 +348,11 @@ void readROM_7800() {
switch (a7800mapper) {
case 0: // Standard 16K/32K/48K [7816/7832/7848]
if (a7800size > 1)
readSegment_7800(0x4000, 0x8000); // +16K = 48K
if (a7800size > 0)
readSegment_7800(0x8000, 0xC000); // +16K = 32K
// Base 16K
readSegment_7800(0xC000, 0x10000); // 16K
readStandard_7800();
break;
case 1: // SuperGame 128K [78SG]
for (int x = 0; x < 7; x++) {
writeData_7800(0x8000, x); // Banks 0-6
readSegment_7800(0x8000, 0xC000); // 16K * 7 = 112K
}
readSegment_7800(0xC000, 0x10000); // Bank 7 +16 = 128K
readSupergame_7800();
break;
case 2: // SuperGame - Alien Brigade/Crossbow 144K [78S9]
@ -392,6 +410,20 @@ void readROM_7800() {
readSegment_7800(0x8000, 0xC000); // 16K * 4 = 64K
}
break;
case 7: // Bankset switching
if (a7800size > 3) {
setHalt_7800(1);
readSupergame_7800();
setHalt_7800(0);
readSupergame_7800();
} else {
setHalt_7800(1);
readStandard_7800();
setHalt_7800(0);
readStandard_7800();
}
break;
}
myFile.close();
@ -405,6 +437,38 @@ void readROM_7800() {
wait();
}
void readStandard_7800() {
if (a7800size > 1)
readSegment_7800(0x4000, 0x8000); // +16K = 48K
if (a7800size > 0)
readSegment_7800(0x8000, 0xC000); // +16K = 32K
// Base 16K
readSegment_7800(0xC000, 0x10000); // 16K
}
void readSupergame_7800() {
for (int x = 0; x < 7; x++) {
writeData_7800(0x8000, x); // Banks 0-6
readSegment_7800(0x8000, 0xC000); // 16K * 7 = 112K
}
readSegment_7800(0xC000, 0x10000); // Bank 7 +16 = 128K
}
void setHalt_7800(byte on) {
if(on == 1) {
PORTH |= (1 << 0); // HALT(PH0) HIGH = SALLY
} else {
PORTH &= ~(1 << 0); // HALT(PH0) LOW = MARIA
}
NOP;
NOP;
NOP;
NOP;
NOP;
NOP;
NOP;
}
//******************************************
// ROM SIZE
//******************************************
@ -560,6 +624,8 @@ void checkStatus_7800() {
println_Msg(F("BASEBALL/ETC [78S4]"));
else if (a7800mapper == 6)
println_Msg(F("KARATEKA(PAL)[78S4]"));
else if (a7800mapper == 7)
println_Msg(F("BANKSET"));
print_Msg(F("ROM SIZE: "));
print_Msg(a7800[a7800size]);
println_Msg(F("K"));
@ -582,6 +648,8 @@ void checkStatus_7800() {
Serial.println(F("Realsports Baseball/Tank Command/Tower Toppler/Waterski [78S4]"));
else if (a7800mapper == 6)
Serial.println(F("Karateka (PAL) [78S4 Variant]"));
else if (a7800mapper == 7)
Serial.println(F("Bankset"));
Serial.print(F("ROM SIZE: "));
Serial.print(A7800[a7800size]);
Serial.println(F("K"));
@ -637,6 +705,8 @@ void setMapper_7800() {
println_Msg(F("BASEBALL/ETC [78S4]"));
else if (a7800mapselect == 6)
println_Msg(F("KARATEKA(PAL) [78S4]"));
else if (a7800mapselect == 7)
println_Msg(F("BANKSET"));
display_Update();
if (i == (a7800mapcount - 1))
i = 0;
@ -665,6 +735,8 @@ void setMapper_7800() {
println_Msg(F("BASEBALL/ETC [78S4]"));
else if (a7800mapselect == 6)
println_Msg(F("KARATEKA(PAL) [78S4]"));
else if (a7800mapselect == 7)
println_Msg(F("BANKSET"));
println_Msg(FS(FSTRING_EMPTY));
#if defined(ENABLE_OLED)
print_STR(press_to_change_STR, 1);
@ -702,6 +774,8 @@ void setMapper_7800() {
println_Msg(F("BASEBALL/ETC [78S4]"));
else if (a7800mapselect == 6)
println_Msg(F("KARATEKA(PAL) [78S4]"));
else if (a7800mapselect == 7)
println_Msg(F("BANKSET"));
println_Msg(FS(FSTRING_EMPTY));
#if defined(ENABLE_OLED)
print_STR(press_to_change_STR, 1);
@ -738,6 +812,8 @@ void setMapper_7800() {
println_Msg(F("BASEBALL/ETC [78S4]"));
else if (a7800mapselect == 6)
println_Msg(F("KARATEKA(PAL) [78S4]"));
else if (a7800mapselect == 7)
println_Msg(F("BANKSET"));
println_Msg(FS(FSTRING_EMPTY));
#if defined(ENABLE_OLED)
print_STR(press_to_change_STR, 1);
@ -770,7 +846,8 @@ setmapper:
Serial.println(F("4 = Double Dragon/Rampage [78AC]"));
Serial.println(F("5 = Realsports Baseball/Tank Command/Tower Toppler/Waterski [78S4]"));
Serial.println(F("6 = Karateka (PAL) [78S4 Variant]"));
Serial.print(F("Enter Mapper [0-6]: "));
Serial.println(F("7 = Bankset"));
Serial.print(F("Enter Mapper [0-7]: "));
while (Serial.available() == 0) {}
newmap = Serial.readStringUntil('\n');
Serial.println(newmap);