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54 lines
1.7 KiB
C
54 lines
1.7 KiB
C
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#pragma once
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#include "stdafx.h"
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#include "BaseMapper.h"
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// bootleg cartridge conversion of the original FDS version of Kid Icarus (パルテナの鏡).
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class Mapper539 : public BaseMapper
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{
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protected:
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uint16_t GetPRGPageSize() override { return 0x2000; }
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uint16_t GetCHRPageSize() override { return 0x2000; }
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uint32_t GetWorkRamSize() override { return 0x2000; }
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uint32_t GetWorkRamPageSize() override { return 0x0100; }
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bool ForceWorkRamSize() override { return true; }
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void InitMapper() override
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{
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RemoveRegisterRange(0x0000, 0xFFFF, MemoryOperation::Any);
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AddRegisterRange(0xA000, 0xAFFF, MemoryOperation::Write);
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AddRegisterRange(0xF000, 0xFFFF, MemoryOperation::Write);
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SelectPRGPage(0, 0xC);
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SelectPRGPage(1, 0);
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SelectPRGPage(2, 0xE);
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SelectPRGPage(3, 0xF);
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SelectCHRPage(0, 0);
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SetCpuMemoryMapping(0x6000, 0x7FFF, 0x0D, PrgMemoryType::PrgRom);
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// Certain ranges in the CPU address space are overlaid with portions of 8 KiB of PRG-RAM as follows:
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// TODO: This mapping seemed to work so whateva
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SetCpuMemoryMapping(0x6000, 0x60FF, 0x18, PrgMemoryType::WorkRam);
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SetCpuMemoryMapping(0x6200, 0x62FF, 0x1A, PrgMemoryType::WorkRam);
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SetCpuMemoryMapping(0x6400, 0x65FF, 0x1C, PrgMemoryType::WorkRam);
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SetCpuMemoryMapping(0x8200, 0x82FF, 0x12, PrgMemoryType::WorkRam);
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SetCpuMemoryMapping(0xC000, 0xD1FF, 0x00, PrgMemoryType::WorkRam);
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SetCpuMemoryMapping(0xDF00, 0xDFFF, 0x1F, PrgMemoryType::WorkRam);
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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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switch(addr & 0xF000) {
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case 0xA000:
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SelectPRGPage(1, value);
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break;
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case 0xF000:
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SetMirroringType((value & 8) ? MirroringType::Horizontal : MirroringType::Vertical);
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break;
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}
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}
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};
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