140 lines
2.7 KiB
C#
140 lines
2.7 KiB
C#
using System;
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using BizHawk.Common.NumberExtensions;
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namespace BizHawk.Emulation.Cores.Components.I8048
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{
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public partial class I8048
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{
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public void Read_Func(ushort dest, ushort src)
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{
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if (CDLCallback != null)
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{
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if (src == PC) CDLCallback(Regs[src], eCDLogMemFlags.FetchOperand);
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else CDLCallback(Regs[src], eCDLogMemFlags.Data);
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}
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Regs[dest] = ReadMemory(Regs[src]);
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}
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public void Write_Func(ushort dest, ushort src)
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{
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if (CDLCallback != null) CDLCallback(Regs[dest], eCDLogMemFlags.Write | eCDLogMemFlags.Data);
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WriteMemory(Regs[dest], (byte)Regs[src]);
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}
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public void TR_Func(ushort dest, ushort src)
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{
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Regs[dest] = Regs[src];
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}
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public void ADD8_Func(ushort dest, ushort src)
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{
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int Reg16_d = Regs[dest];
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Reg16_d += Regs[src];
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FlagC = Reg16_d.Bit(8);
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ushort ans = (ushort)(Reg16_d & 0xFF);
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// redo for aux carry flag
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Reg16_d = Regs[dest] & 0xF;
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Reg16_d += (Regs[src] & 0xF);
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FlagAC = Reg16_d.Bit(4);
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Regs[dest] = ans;
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}
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public void AND8_Func(ushort dest, ushort src)
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{
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Regs[dest] = (ushort)(Regs[dest] & Regs[src]);
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}
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public void OR8_Func(ushort dest, ushort src)
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{
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Regs[dest] = (ushort)(Regs[dest] | Regs[src]);
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}
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public void XOR8_Func(ushort dest, ushort src)
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{
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Regs[dest] = (ushort)(Regs[dest] ^ Regs[src]);
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}
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public void ROR_Func(ushort src)
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{
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ushort c = (ushort)((Regs[src] & 1) << 7);
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Regs[src] = (ushort)(c | ((Regs[src] >> 1) & 0x7F));
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}
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public void ROL_Func(ushort src)
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{
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ushort c = (ushort)((Regs[src] >> 7) & 1);
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Regs[src] = (ushort)(((Regs[src] << 1) & 0xFF) | c);
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}
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public void RRC_Func(ushort src)
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{
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ushort c = (ushort)(FlagC ? 0x80 : 0);
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FlagC = Regs[src].Bit(0);
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Regs[src] = (ushort)(c | ((Regs[src] >> 1) & 0x7F));
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}
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public void RLC_Func(ushort src)
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{
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ushort c = (ushort)(FlagC ? 1 : 0);
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FlagC = Regs[src].Bit(7);
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Regs[src] = (ushort)(((Regs[src] << 1) & 0xFF) | c);
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}
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public void INC8_Func(ushort src)
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{
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Regs[src] = (ushort)((Regs[src] + 1) & 0xFF);
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}
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public void DEC8_Func(ushort src)
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{
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Regs[src] = (ushort)((Regs[src] - 1) & 0xFF);
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}
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public void ADC8_Func(ushort dest, ushort src)
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{
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int Reg16_d = Regs[dest];
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int c = FlagC ? 1 : 0;
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Reg16_d += (Regs[src] + c);
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FlagC = Reg16_d.Bit(8);
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ushort ans = (ushort)(Reg16_d & 0xFF);
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Regs[dest] = ans;
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}
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public void DA_Func(ushort src)
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{
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int a = Regs[src];
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if (((a & 0xF) > 9) | FlagAC)
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{
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a += 0x6;
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}
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if (a > 0xFF) { FlagC = true; }
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if ((((a >> 4) & 0xF) > 9) | FlagC)
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{
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a += 0x60;
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}
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// FlagAC is not reset, nor is FlagC reset
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if (a > 0xFF) { FlagC = true; }
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Regs[src] = (byte)a;
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}
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}
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}
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