public void SetRegisterValue(Register16BitNames register, ushort value)
{
switch (register)
{
case (Register16BitNames.AF):
registers8Bit[Register8BitNames.A].Value = (byte)((value & 0b_1111_1111_0000_0000) >> 8);
registers8Bit[Register8BitNames.F].Value = (byte)(value & 0b_0000_0000_1111_1111);
break;
case (Register16BitNames.BC):
registers8Bit[Register8BitNames.B].Value = (byte)((value & 0b_1111_1111_0000_0000) >> 8);
registers8Bit[Register8BitNames.C].Value = (byte)(value & 0b_0000_0000_1111_1111);
break;
case (Register16BitNames.DE):
registers8Bit[Register8BitNames.D].Value = (byte)((value & 0b_1111_1111_0000_0000) >> 8);
registers8Bit[Register8BitNames.E].Value = (byte)(value & 0b_0000_0000_1111_1111);
break;
case (Register16BitNames.HL):
registers8Bit[Register8BitNames.H].Value = (byte)((value & 0b_1111_1111_0000_0000) >> 8);
registers8Bit[Register8BitNames.L].Value = (byte)(value & 0b_0000_0000_1111_1111);
break;
default:
registers16Bit[register].Value = value;
break;
}
}
public NormalOperation LD_16(Register16BitNames register) => new NormalOperation(() =>
{
ushort currentPC = _cpu.Registers.GetRegisterValue(Register16BitNames.PC);
ushort lsByte = _cpu.Memory[currentPC + 0x1];
ushort msByte = _cpu.Memory[currentPC + 0x2];
ushort newValue = (ushort)((msByte << 8) | lsByte);
Console.WriteLine($"LD {register.ToString()}, 0x{newValue.ToString("X4")}");
_cpu.Registers.SetRegisterValue(register, newValue);
}, $"LD {register.ToString()}, nn", 12, 3);
public ushort GetRegisterValue(Register16BitNames register)
{
switch (register)
{
case (Register16BitNames.AF):
return((ushort)((registers8Bit[Register8BitNames.A].Value << 8) | registers8Bit[Register8BitNames.F].Value));
case (Register16BitNames.BC):
return((ushort)((registers8Bit[Register8BitNames.B].Value << 8) | registers8Bit[Register8BitNames.C].Value));
case (Register16BitNames.DE):
return((ushort)((registers8Bit[Register8BitNames.D].Value << 8) | registers8Bit[Register8BitNames.E].Value));
case (Register16BitNames.HL):
return((ushort)((registers8Bit[Register8BitNames.H].Value << 8) | registers8Bit[Register8BitNames.L].Value));
default:
return(registers16Bit[register].Value);
}
}
