mirror of https://github.com/bsnes-emu/bsnes.git
56 lines
1.4 KiB
C++
56 lines
1.4 KiB
C++
struct KonamiVRC2 : Board {
|
|
KonamiVRC2(Markup::Node& document) : Board(document), vrc2(*this) {
|
|
settings.pinout.a0 = 1 << document["board/chip/pinout/a0"].natural();
|
|
settings.pinout.a1 = 1 << document["board/chip/pinout/a1"].natural();
|
|
}
|
|
|
|
auto prg_read(uint addr) -> uint8 {
|
|
if(addr < 0x6000) return cpu.mdr();
|
|
if(addr < 0x8000) return vrc2.ram_read(addr);
|
|
return prgrom.read(vrc2.prg_addr(addr));
|
|
}
|
|
|
|
auto prg_write(uint addr, uint8 data) -> void {
|
|
if(addr < 0x6000) return;
|
|
if(addr < 0x8000) return vrc2.ram_write(addr, data);
|
|
|
|
bool a0 = (addr & settings.pinout.a0);
|
|
bool a1 = (addr & settings.pinout.a1);
|
|
addr &= 0xfff0;
|
|
addr |= (a0 << 0) | (a1 << 1);
|
|
return vrc2.reg_write(addr, data);
|
|
}
|
|
|
|
auto chr_read(uint addr) -> uint8 {
|
|
if(addr & 0x2000) return ppu.ciram_read(vrc2.ciram_addr(addr));
|
|
return Board::chr_read(vrc2.chr_addr(addr));
|
|
}
|
|
|
|
auto chr_write(uint addr, uint8 data) -> void {
|
|
if(addr & 0x2000) return ppu.ciram_write(vrc2.ciram_addr(addr), data);
|
|
return Board::chr_write(vrc2.chr_addr(addr), data);
|
|
}
|
|
|
|
auto power() -> void {
|
|
vrc2.power();
|
|
}
|
|
|
|
auto reset() -> void {
|
|
vrc2.reset();
|
|
}
|
|
|
|
auto serialize(serializer& s) -> void {
|
|
Board::serialize(s);
|
|
vrc2.serialize(s);
|
|
}
|
|
|
|
struct Settings {
|
|
struct Pinout {
|
|
uint a0;
|
|
uint a1;
|
|
} pinout;
|
|
} settings;
|
|
|
|
VRC2 vrc2;
|
|
};
|