mirror of https://github.com/bsnes-emu/bsnes.git
50 lines
1.0 KiB
C++
50 lines
1.0 KiB
C++
auto SuperFX::step(uint clocks) -> void {
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if(regs.romcl) {
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regs.romcl -= min(clocks, regs.romcl);
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if(regs.romcl == 0) {
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regs.sfr.r = 0;
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regs.romdr = read((regs.rombr << 16) + regs.r[14]);
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}
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}
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if(regs.ramcl) {
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regs.ramcl -= min(clocks, regs.ramcl);
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if(regs.ramcl == 0) {
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write(0x700000 + (regs.rambr << 16) + regs.ramar, regs.ramdr);
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}
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}
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Cothread::step(clocks);
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synchronizeCPU();
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}
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auto SuperFX::syncROMBuffer() -> void {
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if(regs.romcl) step(regs.romcl);
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}
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auto SuperFX::readROMBuffer() -> uint8 {
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syncROMBuffer();
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return regs.romdr;
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}
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auto SuperFX::updateROMBuffer() -> void {
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regs.sfr.r = 1;
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regs.romcl = regs.clsr ? 5 : 6;
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}
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auto SuperFX::syncRAMBuffer() -> void {
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if(regs.ramcl) step(regs.ramcl);
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}
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auto SuperFX::readRAMBuffer(uint16 addr) -> uint8 {
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syncRAMBuffer();
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return read(0x700000 + (regs.rambr << 16) + addr);
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}
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auto SuperFX::writeRAMBuffer(uint16 addr, uint8 data) -> void {
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syncRAMBuffer();
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regs.ramcl = regs.clsr ? 5 : 6;
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regs.ramar = addr;
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regs.ramdr = data;
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}
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