56 lines
960 B
C#
56 lines
960 B
C#
namespace BizHawk.Emulation.Computers.Commodore64.MOS
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{
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// used as Color RAM in C64
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public class Chip2114
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{
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private byte[] ram;
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public Chip2114()
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{
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HardReset();
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}
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public void HardReset()
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{
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ram = new byte[0x400];
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}
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public byte Peek(int addr)
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{
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return ram[addr & 0x3FF];
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}
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public byte Peek(int addr, byte bus)
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{
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return (byte)(ram[addr & 0x3FF] | (bus & 0xF0));
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}
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public void Poke(int addr, byte val)
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{
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ram[addr & 0x3FF] = (byte)(val & 0xF);
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}
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public byte Read(ushort addr)
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{
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return (byte)(ram[addr & 0x3FF]);
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}
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public byte Read(ushort addr, byte bus)
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{
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return (byte)(ram[addr & 0x3FF] | (bus & 0xF0));
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}
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public void SyncState(Serializer ser)
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{
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ByteBuffer buffer = new ByteBuffer(ram);
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ser.Sync("ram", ref buffer);
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}
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public void Write(ushort addr, byte val)
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{
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ram[addr & 0x3FF] = (byte)(val & 0xF);
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}
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}
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}
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