forked from sin365/AxibugEmuOnline
85 lines
2.5 KiB
C#
85 lines
2.5 KiB
C#
//////////////////////////////////////////////////////////////////////////
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// Mapper057 //
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//////////////////////////////////////////////////////////////////////////
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using static VirtualNes.MMU;
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using BYTE = System.Byte;
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namespace VirtualNes.Core
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{
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public class Mapper057 : Mapper
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{
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BYTE reg;
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public Mapper057(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, 0, 1);
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SetVROM_8K_Bank(0);
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reg = 0;
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}
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//void Mapper057::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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case 0x8001:
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case 0x8002:
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case 0x8003:
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if ((data & 0x40) != 0)
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{
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SetVROM_8K_Bank((data & 0x03) + ((reg & 0x10) >> 1) + (reg & 0x07));
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}
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break;
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case 0x8800:
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reg = data;
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if ((data & 0x80) != 0)
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{
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SetPROM_8K_Bank(4, ((data & 0x40) >> 6) * 4 + 8 + 0);
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SetPROM_8K_Bank(5, ((data & 0x40) >> 6) * 4 + 8 + 1);
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SetPROM_8K_Bank(6, ((data & 0x40) >> 6) * 4 + 8 + 2);
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SetPROM_8K_Bank(7, ((data & 0x40) >> 6) * 4 + 8 + 3);
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}
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else
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{
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SetPROM_8K_Bank(4, ((data & 0x60) >> 5) * 2 + 0);
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SetPROM_8K_Bank(5, ((data & 0x60) >> 5) * 2 + 1);
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SetPROM_8K_Bank(6, ((data & 0x60) >> 5) * 2 + 0);
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SetPROM_8K_Bank(7, ((data & 0x60) >> 5) * 2 + 1);
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}
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SetVROM_8K_Bank((data & 0x07) + ((data & 0x10) >> 1));
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if ((data & 0x08) != 0) SetVRAM_Mirror(VRAM_HMIRROR);
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else SetVRAM_Mirror(VRAM_VMIRROR);
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break;
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}
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}
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//void Mapper057::SaveState(LPBYTE p)
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public override void SaveState(byte[] p)
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{
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p[0] = reg;
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}
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//void Mapper057::LoadState(LPBYTE p)
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public override void LoadState(byte[] p)
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{
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reg = p[0];
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}
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public override bool IsStateSave()
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{
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return true;
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}
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}
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}
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