66 lines
1.4 KiB
C#
66 lines
1.4 KiB
C#
using BizHawk.Common;
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namespace BizHawk.Emulation.Cores.Nintendo.NES
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{
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//AKA mapper 184
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//Sunsoft-1 chips, EXCEPT for fantasy zone.
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//this is confusing. see docs/sunsoft.txt
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public sealed class Sunsoft1 : NES.NESBoardBase
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{
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int chr_mask;
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int left_piece = 0;
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int right_piece = 3;
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public override bool Configure(NES.EDetectionOrigin origin)
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{
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//configure
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switch (Cart.board_type)
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{
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case "MAPPER184":
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break;
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case "SUNSOFT-1":
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//this will catch fantasy zone, which isn't emulated the same as the other SUNSOFT-1 boards
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if (Cart.pcb == "SUNSOFT-4")
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return false;
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break;
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default:
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return false;
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}
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chr_mask = (Cart.chr_size / 4) - 1;
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SetMirrorType(Cart.pad_h, Cart.pad_v);
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return true;
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}
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public override byte ReadPPU(int addr)
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{
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if (addr < 0x1000)
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{
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return VROM[(addr & 0xFFF) + (left_piece * 0x1000)];
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}
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else if (addr < 0x2000)
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{
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return VROM[(addr & 0xFFF) + (right_piece * 0x1000)];
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}
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return base.ReadPPU(addr);
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}
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public override void WriteWRAM(int addr, byte value)
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{
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left_piece = value & 7 & chr_mask;
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right_piece = (value >> 4) & 7 & chr_mask;
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}
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public override void SyncState(Serializer ser)
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{
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base.SyncState(ser);
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ser.Sync("left_piece", ref left_piece);
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ser.Sync("right_piece", ref right_piece);
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}
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}
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}
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