forked from sin365/AxibugEmuOnline
77 lines
2.0 KiB
C#
77 lines
2.0 KiB
C#
//////////////////////////////////////////////////////////////////////////
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// Mapper041 Caltron 6-in-1 //
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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 Mapper041 : Mapper
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{
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BYTE[] reg = new byte[2];
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public Mapper041(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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reg[0] = reg[1] = 0;
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SetPROM_32K_Bank(0, 1, 2, 3);
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if (VROM_1K_SIZE != 0)
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{
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SetVROM_8K_Bank(0);
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}
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}
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//void Mapper041::WriteLow(WORD addr, BYTE data)
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public override void WriteLow(ushort addr, byte data)
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{
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if (addr >= 0x6000 && addr < 0x6800)
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{
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SetPROM_32K_Bank(addr & 0x07);
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reg[0] = (byte)(addr & 0x04);
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reg[1] &= 0x03;
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reg[1] |= (byte)((addr >> 1) & 0x0C);
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SetVROM_8K_Bank(reg[1]);
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if ((addr & 0x20) != 0) SetVRAM_Mirror(VRAM_HMIRROR);
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else SetVRAM_Mirror(VRAM_VMIRROR);
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}
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}
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//void Mapper041::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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if (reg[0] != 0)
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{
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reg[1] &= 0x0C;
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reg[1] |= (byte)(addr & 0x03);
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SetVROM_8K_Bank(reg[1]);
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}
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}
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//void Mapper041::SaveState(LPBYTE p)
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public override void SaveState(byte[] p)
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{
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p[0] = reg[0];
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p[1] = reg[1];
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}
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//void Mapper041::LoadState(LPBYTE p)
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public override void LoadState(byte[] p)
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{
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reg[0] = p[0];
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reg[1] = p[1];
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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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