mirror of https://github.com/bsnes-emu/bsnes.git
60 lines
1.4 KiB
C++
60 lines
1.4 KiB
C++
struct KonamiVRC4 : Board {
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KonamiVRC4(Markup::Node& document) : Board(document), vrc4(*this) {
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settings.pinout.a0 = 1 << document["cartridge/chip/pinout/a0"].natural();
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settings.pinout.a1 = 1 << document["cartridge/chip/pinout/a1"].natural();
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}
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auto main() -> void {
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return vrc4.main();
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}
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auto prg_read(uint addr) -> uint8 {
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if(addr < 0x6000) return cpu.mdr();
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if(addr < 0x8000) return prgram.read(addr);
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return prgrom.read(vrc4.prg_addr(addr));
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}
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auto prg_write(uint addr, uint8 data) -> void {
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if(addr < 0x6000) return;
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if(addr < 0x8000) return prgram.write(addr, data);
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bool a0 = (addr & settings.pinout.a0);
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bool a1 = (addr & settings.pinout.a1);
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addr &= 0xfff0;
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addr |= (a1 << 1) | (a0 << 0);
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return vrc4.reg_write(addr, data);
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}
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auto chr_read(uint addr) -> uint8 {
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if(addr & 0x2000) return ppu.ciram_read(vrc4.ciram_addr(addr));
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return Board::chr_read(vrc4.chr_addr(addr));
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}
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auto chr_write(uint addr, uint8 data) -> void {
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if(addr & 0x2000) return ppu.ciram_write(vrc4.ciram_addr(addr), data);
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return Board::chr_write(vrc4.chr_addr(addr), data);
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}
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auto power() -> void {
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vrc4.power();
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}
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auto reset() -> void {
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vrc4.reset();
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}
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auto serialize(serializer& s) -> void {
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Board::serialize(s);
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vrc4.serialize(s);
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}
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struct Settings {
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struct Pinout {
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uint a0;
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uint a1;
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} pinout;
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} settings;
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VRC4 vrc4;
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};
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