mirror of https://github.com/bsnes-emu/bsnes.git
58 lines
1.2 KiB
C++
58 lines
1.2 KiB
C++
struct KonamiVRC3 : Board {
|
|
|
|
struct Settings {
|
|
bool mirror; //0 = horizontal, 1 = vertical
|
|
} settings;
|
|
|
|
VRC3 vrc3;
|
|
|
|
void main() {
|
|
vrc3.main();
|
|
}
|
|
|
|
uint8 prg_read(unsigned addr) {
|
|
if((addr & 0xe000) == 0x6000) return prgram.read(addr & 0x1fff);
|
|
if(addr & 0x8000) return prgrom.read(vrc3.prg_addr(addr));
|
|
return cpu.mdr();
|
|
}
|
|
|
|
void prg_write(unsigned addr, uint8 data) {
|
|
if((addr & 0xe000) == 0x6000) return prgram.write(addr & 0x1fff, data);
|
|
if(addr & 0x8000) return vrc3.reg_write(addr, data);
|
|
}
|
|
|
|
uint8 chr_read(unsigned addr) {
|
|
if(addr & 0x2000) {
|
|
if(settings.mirror == 0) addr = ((addr & 0x0800) >> 1) | (addr & 0x03ff);
|
|
return ppu.ciram_read(addr & 0x07ff);
|
|
}
|
|
return chrram.read(addr);
|
|
}
|
|
|
|
void chr_write(unsigned addr, uint8 data) {
|
|
if(addr & 0x2000) {
|
|
if(settings.mirror == 0) addr = ((addr & 0x0800) >> 1) | (addr & 0x03ff);
|
|
return ppu.ciram_write(addr & 0x07ff, data);
|
|
}
|
|
return chrram.write(addr, data);
|
|
}
|
|
|
|
void power() {
|
|
vrc3.power();
|
|
}
|
|
|
|
void reset() {
|
|
vrc3.reset();
|
|
}
|
|
|
|
void serialize(serializer& s) {
|
|
Board::serialize(s);
|
|
vrc3.serialize(s);
|
|
}
|
|
|
|
KonamiVRC3(Markup::Node& document) : Board(document), vrc3(*this) {
|
|
settings.mirror = document["cartridge"]["mirror"]["mode"].data == "vertical" ? 1 : 0;
|
|
}
|
|
|
|
};
|