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add c64 function to read 16k segments. Remove duplicate code for C64

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This commit is contained in:
smesgr9000 2024-05-10 18:14:54 +02:00
parent 40238b18a1
commit 94c6bd460a
1 changed files with 31 additions and 79 deletions
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110
Cart_Reader/C64.ino
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@ -247,24 +247,32 @@ uint8_t readData_C64(uint16_t addr) {
return ret;
}
void readSegment_C64(uint32_t startaddr, uint32_t endaddr) {
for (uint32_t addr = startaddr; addr < endaddr; addr += 512) {
for (int w = 0; w < 512; w++) {
void readSegment_C64(uint16_t startaddr, uint32_t endaddr, uint16_t size = 512) {
for (uint32_t addr = startaddr; addr < endaddr; addr += size) {
for (uint16_t w = 0; w < size; w++) {
uint8_t temp = readData_C64(addr + w);
sdBuffer[w] = temp;
}
myFile.write(sdBuffer, 512);
myFile.write(sdBuffer, size);
}
}
void readSegmentSmall_C64(uint32_t startaddr, uint32_t endaddr) {
for (uint32_t addr = startaddr; addr < endaddr; addr += 256) {
for (int w = 0; w < 256; w++) {
uint8_t temp = readData_C64(addr + w);
sdBuffer[w] = temp;
}
myFile.write(sdBuffer, 256);
void readSegment16k_C64() {
ROML_ENABLE;
readSegment_C64(0x8000, 0xA000); // 8K
ROML_DISABLE;
ROMH_ENABLE;
readSegment_C64(0xA000, 0xC000); // +8K = 16K
ROMH_DISABLE;
}
void readSegmentBankA0A4_C64(uint16_t bank) {
ROML_ENABLE;
for (uint16_t x = 0; x < bank; x++) {
bankSwitch_C64(0xDE00 + x, 0); // Switch Bank using address lines
readSegment_C64(0x8000, 0xA000); // 8K per bank
}
ROML_DISABLE;
}
//******************************************
@ -395,6 +403,7 @@ void readROM_C64() {
break;
case 1: // Action Replay (32K)
case 9: // Atomic Power (32K)
ROML_ENABLE;
for (int x = 0; x < 4; x++) {
bankSwitch_C64(0xDE00, x << 3); // Switch Bank using D3-D4
@ -405,23 +414,14 @@ void readROM_C64() {
case 2: // KCS Power Cartridge (16K)
case 11: // Westermann Learning (16K)
ROML_ENABLE;
readSegment_C64(0x8000, 0xA000); // 8K
ROML_DISABLE;
ROMH_ENABLE;
readSegment_C64(0xA000, 0xC000); // +8K = 16K
ROMH_DISABLE;
case 16: // WarpSpeed (16K)
readSegment16k_C64();
break;
case 3: // Final Cartridge III (64K)
for (int x = 0; x < 4; x++) {
bankSwitch_C64(0xDFFF, 0x40 + x); // Switch Bank using $DFFF
ROML_ENABLE;
readSegment_C64(0x8000, 0xA000); // 8K
ROML_DISABLE;
ROMH_ENABLE;
readSegment_C64(0xA000, 0xC000); // +8K = 16K
ROMH_DISABLE;
readSegment16k_C64();
}
break;
@ -509,31 +509,17 @@ void readROM_C64() {
case 8: // Super Games (64K)
for (int x = 0; x < 4; x++) {
bankSwitch_C64(0xDF00, x); // Switch Bank
ROML_ENABLE;
readSegment_C64(0x8000, 0xA000); // 8K
ROML_DISABLE;
ROMH_ENABLE;
readSegment_C64(0xA000, 0xC000); // +8K = 16K
ROMH_DISABLE;
readSegment16k_C64();
}
break;
case 9: // Atomic Power (32K)
ROML_ENABLE;
for (int x = 0; x < 4; x++) {
bankSwitch_C64(0xDE00, x << 3); // Switch Bank using D3-D4
readSegment_C64(0x8000, 0xA000); // 8K
}
ROML_DISABLE;
break;
case 10: // Epyx Fastload (8K)
ROML_ENABLE;
bankSwitch_C64(0xDE00, 0); // Read IO1 - Trigger Access
readSegment_C64(0x8000, 0x9E00); // 7680 Bytes
readSegmentSmall_C64(0x9E00, 0x9F00); // +256 Bytes = 7936 Bytes
readSegment_C64(0x9E00, 0x9F00, 256); // +256 Bytes = 7936 Bytes
bankSwitch_C64(0xDF00, 0); // Read IO2 - Access Last 256 Bytes
readSegmentSmall_C64(0x9F00, 0xA000); // +256 Bytes = 8K
readSegment_C64(0x9F00, 0xA000, 256); // +256 Bytes = 8K
ROML_DISABLE;
break;
@ -546,12 +532,7 @@ void readROM_C64() {
case 13: // Final Cartridge I (16K)
bankSwitch_C64(0xDF00, 0); // Enable ROM
ROML_ENABLE;
readSegment_C64(0x8000, 0xA000); // 8K
ROML_DISABLE;
ROMH_ENABLE;
readSegment_C64(0xA000, 0xC000); // +8K = 16K
ROMH_DISABLE;
readSegment16k_C64();
break;
case 14: // Magic Formel (64K)
@ -564,30 +545,11 @@ void readROM_C64() {
break;
case 15: // C64 Game System, System 3 (512K)
ROML_ENABLE;
for (int x = 0; x < 64; x++) {
bankSwitch_C64(0xDE00 + x, 0); // Switch Bank using A0-A4
readSegment_C64(0x8000, 0xA000); // 8K * 64 = 512K
}
ROML_DISABLE;
break;
case 16: // WarpSpeed (16K)
ROML_ENABLE;
readSegment_C64(0x8000, 0xA000); // 8K
ROML_DISABLE;
ROMH_ENABLE;
readSegment_C64(0xA000, 0xC000); // +8K = 16K
ROMH_DISABLE;
readSegmentBankA0A4_C64(64);
break;
case 17: // Dinamic (128K)
ROML_ENABLE;
for (int x = 0; x < 16; x++) {
bankSwitch_C64(0xDE00 + x, 0); // Switch Bank using A0-A4
readSegment_C64(0x8000, 0xA000); // 8K * 16 = 128K
}
ROML_DISABLE;
readSegmentBankA0A4_C64(16);
break;
case 18: // Zaxxon, Super Zaxxon (SEGA) (20K)
@ -618,24 +580,14 @@ void readROM_C64() {
for (int x = 0; x < 4; x++) {
int bank = (((x & 2) << 3) | (0 << 3) | ((x & 1) << 2));
bankSwitch_C64(0xDE00, bank); // Switch Bank using D2-D4 (D3 == 0 Enable ROM)
ROML_ENABLE;
readSegment_C64(0x8000, 0xA000); // 8K
ROML_DISABLE;
ROMH_ENABLE;
readSegment_C64(0xA000, 0xC000); // +8K = 16K
ROMH_DISABLE;
readSegment16k_C64();
}
break;
case 21: // Comal-80 (64K)
for (int x = 0; x < 4; x++) {
bankSwitch_C64(0xDE00, x + 0x80); // Switch Bank
ROML_ENABLE;
readSegment_C64(0x8000, 0xA000); // 8K
ROML_DISABLE;
ROMH_ENABLE;
readSegment_C64(0xA000, 0xC000); // +8K = 16K
ROMH_DISABLE;
readSegment16k_C64();
}
}
myFile.close();