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107 lines
2.4 KiB
C++
107 lines
2.4 KiB
C++
#pragma once
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#include "stdafx.h"
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#include "BaseMapper.h"
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class TaitoX1005 : public BaseMapper
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{
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private:
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bool _alternateMirroring;
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uint8_t _ramPermission;
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void UpdateRamAccess()
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{
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SetCpuMemoryMapping(0x7F00, 0x7FFF, 0, HasBattery() ? PrgMemoryType::SaveRam : PrgMemoryType::WorkRam, _ramPermission == 0xA3 ? MemoryAccessType::ReadWrite : MemoryAccessType::NoAccess);
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}
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protected:
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virtual uint16_t GetPRGPageSize() { return 0x2000; }
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virtual uint16_t GetCHRPageSize() { return 0x0400; }
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virtual uint16_t RegisterStartAddress() { return 0x7EF0; }
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virtual uint16_t RegisterEndAddress() { return 0x7EFF; }
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virtual uint32_t GetWorkRamSize() { return 0x100; }
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virtual uint32_t GetWorkRamPageSize() { return 0x100; }
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virtual uint32_t GetSaveRamSize() { return 0x100; }
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virtual uint32_t GetSaveRamPageSize() { return 0x100; }
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void InitMapper()
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{
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_ramPermission = 0;
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SelectPRGPage(3, -1);
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UpdateRamAccess();
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}
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virtual bool ForceBattery()
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{
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//Patch: Force battery, because some headers are marked as having no battery even though the game expects one
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return true;
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}
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void WriteRegister(uint16_t addr, uint8_t value)
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{
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switch(addr) {
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case 0x7EF0:
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SelectCHRPage(0, value);
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SelectCHRPage(1, value + 1);
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if(_alternateMirroring) {
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SetNametable(0, value >> 7);
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SetNametable(1, value >> 7);
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}
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break;
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case 0x7EF1:
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SelectCHRPage(2, value );
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SelectCHRPage(3, value + 1);
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if(_alternateMirroring) {
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SetNametable(2, value >> 7);
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SetNametable(3, value >> 7);
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}
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break;
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case 0x7EF2: SelectCHRPage(4, value); break;
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case 0x7EF3: SelectCHRPage(5, value); break;
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case 0x7EF4: SelectCHRPage(6, value); break;
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case 0x7EF5: SelectCHRPage(7, value); break;
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case 0x7EF6: case 0x7EF7:
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if(!_alternateMirroring) {
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SetMirroringType((value & 0x01) == 0x01 ? MirroringType::Vertical : MirroringType::Horizontal);
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}
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break;
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case 0x7EF8: case 0x7EF9:
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_ramPermission = value;
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UpdateRamAccess();
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break;
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case 0x7EFA: case 0x7EFB:
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SelectPRGPage(0, value);
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break;
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case 0x7EFC: case 0x7EFD:
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SelectPRGPage(1, value);
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break;
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case 0x7EFE: case 0x7EFF:
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SelectPRGPage(2, value);
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break;
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}
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}
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virtual void StreamState(bool saving)
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{
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BaseMapper::StreamState(saving);
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Stream(_ramPermission);
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if(!saving) {
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UpdateRamAccess();
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}
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}
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public:
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TaitoX1005(bool alternateMirroring) : _alternateMirroring(alternateMirroring)
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{
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}
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}; |