48 lines
992 B
C
48 lines
992 B
C
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#pragma once
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#include "MMC3.h"
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class MMC3_196 : public MMC3
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{
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private:
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uint8_t _exRegs[2];
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protected:
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void InitMapper()
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{
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MMC3::InitMapper();
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_exRegs[0] = _exRegs[1] = 0;
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AddRegisterRange(0x6000, 0x6FFF, MemoryOperation::Write);
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}
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void StreamState(bool saving) override
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{
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MMC3::StreamState(saving);
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Stream(_exRegs[0], _exRegs[1]);
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}
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void UpdatePrgMapping() override
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{
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if(_exRegs[0]) {
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//Used by Master Fighter II (Unl) (UT1374 PCB)
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SelectPrgPage4x(0, _exRegs[1] << 2);
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} else {
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MMC3::UpdatePrgMapping();
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}
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}
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void WriteRegister(uint16_t addr, uint8_t value) override
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{
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if(addr < 0x8000) {
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_exRegs[0] = 1;
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_exRegs[1] = (value & 0x0F) | (value >> 4);
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UpdatePrgMapping();
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} else {
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if(addr >= 0xC000) {
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addr = (addr & 0xFFFE) | ((addr >> 2) & 0x01) | ((addr >> 3) & 0x01);
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} else {
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addr = (addr & 0xFFFE) | ((addr >> 2) & 0x01) | ((addr >> 3) & 0x01) | ((addr >> 1) & 0x01);
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}
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MMC3::WriteRegister(addr, value);
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}
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}
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};
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