82 lines
1.6 KiB
C#
82 lines
1.6 KiB
C#
//////////////////////////////////////////////////////////////////////////
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// Mapper022 Konami VRC2 type A //
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//////////////////////////////////////////////////////////////////////////
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using static VirtualNes.MMU;
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using static VirtualNes.Core.CPU;
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using INT = System.Int32;
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using BYTE = System.Byte;
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using Codice.CM.Client.Differences;
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namespace VirtualNes.Core
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{
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public class Mapper022 : Mapper
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{
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public Mapper022(NES parent) : base(parent)
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{
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}
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public override void Reset()
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{
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SetPROM_32K_Bank(0, 1, PROM_8K_SIZE - 2, PROM_8K_SIZE - 1);
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}
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//void Mapper022::Write(WORD addr, BYTE data)
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public override void Write(ushort addr, byte data)
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{
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switch (addr)
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{
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case 0x8000:
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SetPROM_8K_Bank(4, data);
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break;
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case 0x9000:
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data &= 0x03;
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if (data == 0) SetVRAM_Mirror(VRAM_VMIRROR);
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else if (data == 1) SetVRAM_Mirror(VRAM_HMIRROR);
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else if (data == 2) SetVRAM_Mirror(VRAM_MIRROR4H);
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else SetVRAM_Mirror(VRAM_MIRROR4L);
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break;
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case 0xA000:
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SetPROM_8K_Bank(5, data);
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break;
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case 0xB000:
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SetVROM_1K_Bank(0, data >> 1);
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break;
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case 0xB001:
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SetVROM_1K_Bank(1, data >> 1);
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break;
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case 0xC000:
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SetVROM_1K_Bank(2, data >> 1);
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break;
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case 0xC001:
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SetVROM_1K_Bank(3, data >> 1);
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break;
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case 0xD000:
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SetVROM_1K_Bank(4, data >> 1);
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break;
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case 0xD001:
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SetVROM_1K_Bank(5, data >> 1);
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break;
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case 0xE000:
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SetVROM_1K_Bank(6, data >> 1);
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break;
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case 0xE001:
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SetVROM_1K_Bank(7, data >> 1);
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break;
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}
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}
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}
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}
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