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reduce duplicate code by parameterise ROML/ROMH

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smesgr9000 2024-05-12 11:40:34 +02:00
parent c09e772299
commit 32f6b4151b
1 changed files with 38 additions and 63 deletions
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101
Cart_Reader/C64.ino
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@ -257,18 +257,30 @@ void readSegment_C64(uint16_t startaddr, uint32_t endaddr, uint16_t size = 512)
}
}
void readSegment16k_C64() {
ROML_ENABLE;
readSegment_C64(0x8000, 0xA000); // 8K
ROML_DISABLE;
ROMH_ENABLE;
readSegment_C64(0xA000, 0xC000); // +8K = 16K
ROMH_DISABLE;
void readSegmentEnableDisable_C64(uint16_t startaddr, uint32_t endaddr, byte romLow, uint16_t size = 512) {
PORTL &= ~(1 << romLow); // enable ROML or ROMH
readSegment_C64(startaddr, endaddr, size);
PORTL |= (1 << romLow); // disable ROML or ROMH
}
void readSegmentBankA0A4_C64(uint16_t bank) {
void readSegment16k_C64() {
readSegmentEnableDisable_C64(0x8000, 0xA000, 0); // 8K
readSegmentEnableDisable_C64(0xA000, 0xC000, 1); // +8K = 16K
}
void readSegmentBankD0D5_C64(uint16_t banks, uint16_t address, byte romLow) {
PORTL &= ~(1 << romLow); // enable ROML or ROMH
uint32_t endAddress = address + 0x2000;
for (uint16_t x = 0; x < banks; x++) {
bankSwitch_C64(0xDE00, x); // Switch Bank using D0-D5
readSegment_C64(address, endAddress);
}
PORTL |= (1 << romLow); // disable ROML or ROMH
}
void readSegmentBankA0A4_C64(uint16_t banks) {
ROML_ENABLE;
for (uint16_t x = 0; x < bank; x++) {
for (uint16_t x = 0; x < banks; x++) {
bankSwitch_C64(0xDE00 + x, 0); // Switch Bank using address lines
readSegment_C64(0x8000, 0xA000); // 8K per bank
}
@ -381,24 +393,17 @@ void readROM_C64() {
// ULTIMAX CARTS
if (c64port == 2) { // 2 = 10 = EXROM HIGH/GAME LOW
if (c64size > 1) { // 16K [NO ROML FOR 8K]
ROML_ENABLE;
readSegment_C64(0x8000, 0xA000); // 8K
ROML_DISABLE;
readSegmentEnableDisable_C64(0x8000, 0xA000, 0); // 8K
}
ROMH_ENABLE;
readSegment_C64(0xE000, 0x10000); // +8K = 8K/16K
ROMH_DISABLE;
readSegmentEnableDisable_C64(0xE000, 0x10000, 1); // +8K = 8K/16K
} else { // NORMAL CARTS
ROML_ENABLE;
readSegment_C64(0x8000, 0x9000); // 4K
if (c64size > 0)
readSegment_C64(0x9000, 0xA000); // +4K = 8K
ROML_DISABLE;
if (c64size > 1) {
ROMH_ENABLE;
readSegment_C64(0xA000, 0xC000); // +8K = 16K
ROMH_DISABLE;
if (c64size > 0) {
readSegmentEnableDisable_C64(0x8000, 0xA000, 0); // 8K
if (c64size > 1)
readSegmentEnableDisable_C64(0xA000, 0xC000, 1); // +8K = 16K
}
else
readSegmentEnableDisable_C64(0x9000, 0xA000, 0); // 4K
}
break;
@ -426,9 +431,7 @@ void readROM_C64() {
break;
case 4: // Simons Basic (16K)
ROML_ENABLE;
readSegment_C64(0x8000, 0xA000); // 8K
ROML_DISABLE;
readSegmentEnableDisable_C64(0x8000, 0xA000, 0); // 8K
ROMH_ENABLE;
bankSwitch_C64(0xDE00, 0x1); // Switch Bank to ROM
readSegment_C64(0xA000, 0xC000); // +8K = 16K
@ -459,35 +462,18 @@ void readROM_C64() {
// Robocop 2 + Shadow of the Beast
println_Msg(F("TWO CHIP"));
display_Update();
ROML_ENABLE;
for (int x = 0; x < 16; x++) {
bankSwitch_C64(0xDE00, x); // Switch Bank using D0-D3
readSegment_C64(0x8000, 0xA000); // 8K * 16 = 128K
}
ROML_DISABLE;
ROMH_ENABLE;
for (int x = 0; x < 16; x++) {
bankSwitch_C64(0xDE00, x); // Switch Bank using D0-D3
readSegment_C64(0xA000, 0xC000); // 8K * 16 = +128K = 256K
}
ROMH_DISABLE;
readSegmentBankD0D5_C64(16, 0x8000, 0); // 8K * 16 = 128K
readSegmentBankD0D5_C64(16, 0xA000, 1); // 8K * 16 = +128K = 256K
} else { // Single Chip 128K/256K/512K
println_Msg(F("SINGLE CHIP"));
display_Update();
ROML_ENABLE;
c64banks = C64[c64size] / 8;
for (int x = 0; x < c64banks; x++) {
bankSwitch_C64(0xDE00, x); // Switch Bank using D0-D5
readSegment_C64(0x8000, 0xA000); // 8K * Banks = 128K/256K/512K
}
ROML_DISABLE;
readSegmentBankD0D5_C64(c64banks, 0x8000, 0); // 8K * Banks = 128K/256K/512K
}
break;
}
case 6: // Expert Cartridge (8K)
ROML_ENABLE;
readSegment_C64(0x8000, 0xA000); // 8K
ROML_DISABLE;
readSegmentEnableDisable_C64(0x8000, 0xA000, 0);
break;
case 7: // Fun Play, Power Play (128K)
@ -553,27 +539,16 @@ void readROM_C64() {
break;
case 18: // Zaxxon, Super Zaxxon (SEGA) (20K)
ROML_ENABLE;
readSegment_C64(0x8000, 0x9000); // 4K
ROML_DISABLE;
ROMH_ENABLE;
readSegment_C64(0xA000, 0xC000); // +8K = 12K
ROMH_DISABLE;
readSegmentEnableDisable_C64(0x8000, 0x9000, 0); // 4K
readSegmentEnableDisable_C64(0xA000, 0xC000, 1); // +8K = 12K
// Switch Bank
readData_C64(0x9000);
ROMH_ENABLE;
readSegment_C64(0xA000, 0xC000); // +8K = 20K
ROMH_DISABLE;
readSegmentEnableDisable_C64(0xA000, 0xC000, 1); // +8K = 20K
break;
case 19: // Magic Desk, Domark, HES Australia (32K/64K/128K)
ROML_ENABLE;
c64banks = C64[c64size] / 8;
for (int x = 0; x < c64banks; x++) {
bankSwitch_C64(0xDE00, x); // Switch Bank using D0-D3
readSegment_C64(0x8000, 0xA000); // 8K * Banks = 32K/64K/128K
}
ROML_DISABLE;
readSegmentBankD0D5_C64(c64banks, 0x8000, 0);
break;
case 20: // Super Snapshot 5 (64K)