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https://github.com/SourMesen/Mesen.git
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71 lines
1.7 KiB
C++
71 lines
1.7 KiB
C++
#pragma once
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#include "stdafx.h"
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#include "BaseMapper.h"
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class Kaiser7057 : public BaseMapper
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{
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private:
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uint8_t _regs[8];
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protected:
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uint16_t GetPRGPageSize() override { return 0x800; }
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uint16_t GetCHRPageSize() override { return 0x2000; }
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void InitMapper() override
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{
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memset(_regs, 0, sizeof(_regs));
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SelectCHRPage(0, 0);
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UpdateState();
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}
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void StreamState(bool saving) override
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{
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BaseMapper::StreamState(saving);
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ArrayInfo<uint8_t> regs{ _regs, 8 };
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Stream(regs);
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if(!saving) {
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UpdateState();
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}
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}
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void UpdateState()
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{
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for(int i = 0; i < 4; i++) {
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SetCpuMemoryMapping(0x6000 + 0x800 * i, 0x67FF + 0x800 * i, _regs[4 + i], PrgMemoryType::PrgRom);
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SelectPRGPage(i, _regs[i]);
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}
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SelectPrgPage4x(1, 0x34);
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SelectPrgPage4x(2, 0x38);
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SelectPrgPage4x(3, 0x3C);
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}
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void UpdatePrgReg(int index, uint8_t value, bool low)
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{
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if(low) {
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_regs[index] = (_regs[index] & 0xF0) | (value & 0x0F);
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} else {
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_regs[index] = (_regs[index] & 0x0F) | ((value << 4) & 0xF0);
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}
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UpdateState();
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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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bool low = (addr & 0x01) == 0x00;
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switch(addr & 0xF002) {
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case 0x8000: case 0x8002: case 0x9000: case 0x9002:
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SetMirroringType(value & 0x01 ? MirroringType::Vertical : MirroringType::Horizontal);
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break;
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case 0xB000: UpdatePrgReg(0, value, low); break;
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case 0xB002: UpdatePrgReg(1, value, low); break;
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case 0xC000: UpdatePrgReg(2, value, low); break;
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case 0xC002: UpdatePrgReg(3, value, low); break;
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case 0xD000: UpdatePrgReg(4, value, low); break;
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case 0xD002: UpdatePrgReg(5, value, low); break;
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case 0xE000: UpdatePrgReg(6, value, low); break;
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case 0xE002: UpdatePrgReg(7, value, low); break;
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}
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}
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}; |