mirror of https://github.com/bsnes-emu/bsnes.git
62 lines
1.0 KiB
C++
62 lines
1.0 KiB
C++
auto HuC6280::mmu(uint16 addr) const -> uint21 {
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return r.mpr[addr.bits(13,15)] << 13 | addr.bits(0,12);
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}
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//
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auto HuC6280::load8(uint8 addr) -> uint8 {
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step(r.cs);
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return read(mmu(0x2000 + addr));
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}
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auto HuC6280::load16(uint16 addr) -> uint8 {
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step(r.cs);
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return read(mmu(addr));
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}
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auto HuC6280::store8(uint8 addr, uint8 data) -> void {
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step(r.cs);
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return write(mmu(0x2000 + addr), data);
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}
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auto HuC6280::store16(uint16 addr, uint8 data) -> void {
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step(r.cs);
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return write(mmu(addr), data);
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}
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auto HuC6280::store21(uint21 addr, uint8 data) -> void {
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step(r.cs);
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return write(addr, data);
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}
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//
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auto HuC6280::io() -> uint8 {
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step(r.cs);
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return read(mmu(PC));
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}
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auto HuC6280::opcode() -> uint8 {
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step(r.cs);
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return read(mmu(PC++));
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}
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auto HuC6280::operand() -> uint8 {
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step(r.cs);
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return read(mmu(PC++));
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}
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//
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auto HuC6280::push(uint8 data) -> void {
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step(r.cs);
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write(mmu(0x2100 + S), data);
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S--;
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}
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auto HuC6280::pull() -> uint8 {
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step(r.cs);
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S++;
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return read(mmu(0x2100 + S));
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}
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