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reduce duplicate code in bank 7800 switching code

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This commit is contained in:
smesgr9000 2024-05-12 12:09:59 +02:00
parent 32f6b4151b
commit a8cd9c52a6
1 changed files with 29 additions and 33 deletions
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62
Cart_Reader/7800.ino
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@ -185,7 +185,7 @@ void a7800Menu() {
// READ CODE
//******************************************
uint8_t readData_7800(uint32_t addr) // Add Input Pullup
uint8_t readData_7800(uint16_t addr) // Add Input Pullup
{
PORTF = addr & 0xFF; // A0-A7
PORTK = (addr >> 8) & 0xFF; // A8-A15
@ -223,7 +223,7 @@ uint8_t readData_7800(uint32_t addr) // Add Input Pullup
return ret;
}
void readSegment_7800(uint32_t startaddr, uint32_t endaddr) {
void readSegment_7800(uint16_t startaddr, uint32_t endaddr) {
for (uint32_t addr = startaddr; addr < endaddr; addr += 512) {
for (int w = 0; w < 512; w++) {
uint8_t temp = readData_7800(addr + w);
@ -233,7 +233,29 @@ void readSegment_7800(uint32_t startaddr, uint32_t endaddr) {
}
}
void writeData_7800(uint32_t addr, uint8_t data) {
void readSegmentBank_7800(uint8_t startbank, uint8_t endbank) {
for (uint8_t x = startbank; x < endbank; x++) {
writeData_7800(0x8000, x);
readSegment_7800(0x8000, 0xC000);
}
}
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() {
readSegmentBank_7800(0, 7); // Bank 0-6 16K * 7 = 112K
readSegment_7800(0xC000, 0x10000); // Bank 7 +16K = 128K
}
void writeData_7800(uint16_t addr, uint8_t data) {
PORTF = addr & 0xFF; // A0-A7
PORTK = (addr >> 8) & 0xFF; // A8-A15
NOP;
@ -293,7 +315,7 @@ void writeData_7800(uint32_t addr, uint8_t data) {
}
// Activision Bankswitch - Double Dragon/Rampage 128K
void bankSwitch_7800(uint32_t addr) {
void bankSwitch_7800(uint16_t addr) {
PORTF = addr & 0xFF; // A0-A7
PORTK = (addr >> 8) & 0xFF; // A8-A15
NOP;
@ -354,10 +376,7 @@ void readROM_7800() {
case 2: // SuperGame - Alien Brigade/Crossbow 144K [78S9]
readSegment_7800(0x4000, 0x8000); // 16K
for (int x = 0; x < 8; x++) {
writeData_7800(0x8000, x); // Banks 0-7
readSegment_7800(0x8000, 0xC000); // 16K * 8 = +128K = 144K
}
readSegmentBank_7800(0, 8); // 16K * 8 = +128K = 144K
break;
case 3: // F-18 Hornet 64K [78AB]
@ -395,17 +414,11 @@ void readROM_7800() {
break;
case 5: // Realsports Baseball/Tank Command/Tower Toppler/Waterski 64K [78S4]
for (int x = 0; x < 4; x++) {
writeData_7800(0x8000, x);
readSegment_7800(0x8000, 0xC000); // 16K * 4 = 64K
}
readSegmentBank_7800(0, 4); // 16K * 4 = 64K
break;
case 6: // Karateka (PAL) 64K [78S4 Variant]
for (int x = 4; x < 8; x++) {
writeData_7800(0x8000, x);
readSegment_7800(0x8000, 0xC000); // 16K * 4 = 64K
}
readSegmentBank_7800(4, 8); // 16K * 4 = 64K
break;
case 7: // Bankset switching
@ -433,23 +446,6 @@ 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