public INC16(Gameboy parent, byte opcode) : base(parent)
{
target = OpcodeUtils.BitsToRegister16((opcode & 0b1110000) >> 4);
Cycles = 8;
Disassembly = "inc " + OpcodeUtils.Register16ToString(target);
}
public ADD16(Gameboy parent, byte opcode) : base(parent)
{
source = OpcodeUtils.BitsToRegister16((opcode & 0b110000) >> 4);
Disassembly = "add hl, " + OpcodeUtils.Register16ToString(source);
Cycles = 8;
}
public LDA(Gameboy parent, byte opcode) : base(parent)
{
load = (opcode & 0b1000) > 0;
regpair = (opcode & 0b10000) > 0 ? Register16.DE : Register16.BC;
Cycles = 8;
TickAccurate = true;
Disassembly = load ? "ld a, [" + OpcodeUtils.Register16ToString(regpair) + "]" : "ld [" + OpcodeUtils.Register16ToString(regpair) + "], a";
}
public PUSH(Gameboy parent, byte opcode) : base(parent)
{
source = OpcodeUtils.BitsToRegister16((opcode & 0b110000) >> 4);
if (source == Register16.SP)
{
source = Register16.AF;
}
Cycles = 16;
Disassembly = "push " + OpcodeUtils.Register16ToString(source);
}
public POP(Gameboy parent, byte opcode) : base(parent)
{
target = OpcodeUtils.BitsToRegister16((opcode & 0b110000) >> 4);
if (target == Register16.SP)
{
target = Register16.AF;
}
Cycles = 12;
Disassembly = "pop " + OpcodeUtils.Register16ToString(target);
}
public LD16(Gameboy parent, byte opcode) : base(parent)
{
target = OpcodeUtils.BitsToRegister16((opcode & 0b110000) >> 4);
targetLow = target == Register16.BC ? Register.C : target == Register16.DE ? Register.E : Register.L;
targetHigh = target == Register16.BC ? Register.B : target == Register16.DE ? Register.D : Register.H;
Cycles = 12;
Length = 3;
TickAccurate = true;
Disassembly = "ld " + OpcodeUtils.Register16ToString(target) + ", $" + (parent.Memory[parent.PC + 1] + (parent.Memory[parent.PC + 2] << 8)).ToString("X2");
}