59 lines
1.5 KiB
C#
59 lines
1.5 KiB
C#
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namespace BizHawk.Emulation.Cores.Sega.MasterSystem
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{
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public partial class SMS
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{
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// The CodeMasters mapper has 3 banks of 16kb, like the Sega mapper.
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// The differences are that the paging control addresses are different, and the first 1K of ROM is not protected.
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// Bank 0: Control Address $0000 - Maps $0000 - $3FFF
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// Bank 1: Control Address $4000 - Maps $4000 - $7FFF
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// Bank 2: Control Address $8000 - Maps $8000 - $BFFF
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// System RAM is at $C000+ as in the Sega mapper.
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byte xCoord = 128;
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byte yCoord = 100;
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enum Axis { XAxis, YAxis };
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Axis axis = Axis.XAxis;
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byte ReadMemoryTO(ushort address)
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{
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if (address < 0x8000) return RomData[address & 0x1FFF];
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if (address == 0x8000)
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{
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// return press status
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return 0;
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//return (byte)(Controller["P1 B1"] ? 1 : 0);
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}
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if (address == 0xA000)
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{
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if (Controller["P1 Left"]) xCoord++;
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if (Controller["P1 Right"]) xCoord++;
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if (Controller["P1 Up"]) yCoord--;
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if (Controller["P1 Down"]) yCoord++;
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return 0;
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//if (!Controller["P1 B1"]) return 0;
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//if (axis == Axis.XAxis) return xCoord;
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//return yCoord;
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}
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return SystemRam[address & RamSizeMask];
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}
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void WriteMemoryTO(ushort address, byte value)
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{
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if (address >= 0xC000)
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SystemRam[address & RamSizeMask] = value;
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else if (address == 0x6000)
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axis = ((value & 1) == 0) ? Axis.XAxis : Axis.YAxis;
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}
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void InitTerebiOekaki()
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{
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Cpu.ReadMemory = ReadMemoryTO;
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Cpu.WriteMemory = WriteMemoryTO;
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}
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}
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}
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