bsnes/fc/cartridge/board/konami-vrc3.cpp

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;
}
};