72 lines
1.8 KiB
C#
72 lines
1.8 KiB
C#
//////////////////////////////////////////////////////////////////////////
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// Mapper175 15-in-1 (Kaiser) //
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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 System;
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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 Mapper175 : Mapper
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{
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BYTE reg_dat;
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public Mapper175(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_16K_Bank(4, 0);
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SetPROM_16K_Bank(6, 0);
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reg_dat = 0;
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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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//BYTE Mapper175::Read(WORD addr)
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public override void Read(ushort addr, byte data)
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{
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if (addr == 0xFFFC)
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{
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SetPROM_16K_Bank(4, reg_dat & 0x0F);
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SetPROM_8K_Bank(6, (reg_dat & 0x0F) * 2);
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}
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}
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//void Mapper175::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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if ((data & 0x04)!=0)
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{
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SetVRAM_Mirror(VRAM_HMIRROR);
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}
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else
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{
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SetVRAM_Mirror(VRAM_VMIRROR);
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}
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break;
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case 0xA000:
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reg_dat = data;
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SetPROM_8K_Bank(7, (reg_dat & 0x0F) * 2 + 1);
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SetVROM_8K_Bank(reg_dat & 0x0F);
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break;
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}
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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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