60 lines
1.2 KiB
C#
60 lines
1.2 KiB
C#
using System;
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using System.IO;
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using System.Diagnostics;
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namespace BizHawk.Emulation.Consoles.Nintendo
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{
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[NES.INESBoardImplPriority]
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public class TVROM : MMC3Board_Base
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{
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public override bool Configure(NES.EDetectionOrigin origin)
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{
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//analyze board type
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switch (Cart.board_type)
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{
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case "NES-TVROM": //rad racer II (U)
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AssertPrg(64); AssertChr(64); AssertVram(8); AssertWram(0);
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AssertBattery(false);
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break;
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case "NES-TR1ROM": // Gauntlet variant (untested!)
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break;
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default:
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return false;
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}
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BaseSetup();
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return true;
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}
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//nesdev wiki says that the nes CIRAM doesnt get used at all.
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//and that even though 8KB is really here, only 4KB gets used.
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//still, purists could validate it.
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public override byte ReadPPU(int addr)
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{
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if (addr < 0x2000)
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{
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//read patterns from mapper controlled area
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return base.ReadPPU(addr);
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}
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else
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{
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return VRAM[addr & 0xFFF];
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}
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}
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public override void WritePPU(int addr, byte value)
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{
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if (addr < 0x2000)
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{
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//nothing wired here
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}
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else
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{
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VRAM[addr & 0xFFF] = value;
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}
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}
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}
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} |