//INC B 1 4 Z 0 H -
public void INC_r(R8Bit A, R8BitFlag flag)
{
flag.HalfCarryFlag = (A.Value & 0x0F) == 0x0F;
A++;
flag.ZeroFlag = A.Value == 0;
flag.SubFlag = false;
}
//ADC A, B 1 4 Z 0 H C
public void AddWithCarry(R8Bit A, R8Bit B, R8BitFlag flag)
{
byte carry = (byte)(flag.CarryFlag ? 1 : 0);
flag.HalfCarryFlag = ((A.Value & 0x0F) + (B.Value & 0x0F) + carry) > 0x0F;
var result = A.Value + B.Value + carry;
flag.CarryFlag = result > 255;
A.Value = (byte)result;
flag.SubFlag = false;
flag.ZeroFlag = A.Value == 0;
}
//ADC A,d8 2 8 Z 0 H C
public void AddImmediateWithCarry(R8Bit A, R16Bit PC, MappedMemory memory, R8BitFlag flag)
{
byte immediate = memory.ReadByte(PC);
byte carry = (byte)(flag.CarryFlag ? 1 : 0);
flag.HalfCarryFlag = ((A.Value & 0x0F) + (B.Value & 0x0F) + carry) > 0x0F;
var result = A.Value + B.Value + carry;
flag.CarryFlag = result > 255;
A.Value = (byte)result;
flag.SubFlag = false;
flag.ZeroFlag = A.Value == 0;
}
public CPU(MappedMemory memory)
{
_memory = memory;
//Create Registers
A = new R8Bit("a");
F = new R8BitFlag("f");
AF = new R16Bit(A, F);
B = new R8Bit("b");
C = new R8Bit("c");
BC = new R16Bit(B, C);
D = new R8Bit("d");
E = new R8Bit("e");
DE = new R16Bit(D, E);
H = new R8Bit("h");
L = new R8Bit("l");
HL = new R16Bit(H, L);
PC = new R16Bit("pc");
SP = new R16Bit("sp");
}
public R16Bit(string name)
{
this.Name = name;
h = new R8Bit(name.ToCharArray()[0].ToString());
l = new R8Bit(name.ToCharArray()[1].ToString());
}
public R16Bit(R8Bit r1, R8Bit r2)
{
Name = r1.Name + r2.Name;
h = r1;
l = r2;
}
public void SBC_r_RR(R8Bit A, R16Bit HL, R8BitFlag flag)
{
throw new NotImplementedException();
}
public void SBC_r_r(R8Bit A, R8Bit B, R8BitFlag flag)
{
throw new NotImplementedException();
}
public void LDH_r_a8(R8Bit A, R16Bit a8, R8BitFlag flag)
{
throw new NotImplementedException();
}
public void LD_RRrec_r(R16Bit HL, R8Bit A, R8BitFlag flag)
{
throw new NotImplementedException();
}
//LD (BC),A 1 8 - - - -
public void LD_RR_r(R16Bit BC, R8Bit A)
{
_memory.WriteByte(BC, A);
}
public void LD_r_a16(R8Bit A, R16Bit a16, R8BitFlag flag)
{
throw new NotImplementedException();
}
public void ADD_r_d8(R8Bit A, R16Bit d8, R8BitFlag flag)
{
throw new NotImplementedException();
}
//ADC A,(HL) 1 8 Z 0 H C
public void AddWithCarryHL(R8Bit A, R16Bit HL, MappedMemory memory, R8BitFlag flag)
{
AddImmediateWithCarry(A, HL, memory, flag);
}
