public SBC(Gameboy parent, byte opcode) : base(parent)
{
source = OpcodeUtils.BitsToRegister(opcode & 0b111);
Cycles = source == Register.M ? 8 : 4;
Disassembly = "sbc " + (source == Register.M ? "[hl]" : OpcodeUtils.RegisterToString(source));
}
public DEC(Gameboy parent, byte opcode) : base(parent)
{
target = OpcodeUtils.BitsToRegister((opcode & 0b111000) >> 3);
Cycles = target == Register.M ? 12 : 4;
TickAccurate = target == Register.M;
Disassembly = "dec " + (target == Register.M ? "[hl]" : OpcodeUtils.RegisterToString(target));
}
public SWAP(Gameboy parent, byte opcode) : base(parent)
{
target = OpcodeUtils.BitsToRegister(opcode & 0b111);
Length = 2;
Cycles = (target == Register.M) ? 16 : 8;
TickAccurate = target == Register.M;
Disassembly = "swap " + (target == Register.M ? "[hl]" : OpcodeUtils.RegisterToString(target));
}
public PSL(Gameboy parent, byte opcode) : base(parent)
{
target = OpcodeUtils.BitsToRegister(opcode & 0b111);
Length = 2;
Cycles = target == Register.M ? 16 : 8;
TickAccurate = target == Register.M;
Disassembly = "srl " + OpcodeUtils.RegisterToString(target);
}
public PSA(Gameboy parent, byte opcode) : base(parent)
{
left = (opcode & 0b1000) == 0;
target = OpcodeUtils.BitsToRegister(opcode & 0b111);
Length = 2;
Cycles = target == Register.M ? 16 : 8;
TickAccurate = target == Register.M;
Disassembly = (left ? "sla" : "sra") + " " + OpcodeUtils.RegisterToString(target);
}
public LDI(Gameboy parent, byte opcode) : base(parent)
{
target = OpcodeUtils.BitsToRegister((opcode & 0b111000) >> 3);
Cycles = target == Register.M ? 12 : 8;
Length = 2;
TickAccurate = true;
actionTick = target == Register.M ? 7 : 3;
Disassembly = "ld " + (target == Register.M ? "[hl]" : OpcodeUtils.RegisterToString(target)) + ", $" + parent.Memory[parent.PC + 1].ToString("X2");
}
public PRT(Gameboy parent, byte opcode) : base(parent)
{
left = (opcode & 0b1000) == 0;
useCarry = (opcode & 0b10000) > 0;
target = OpcodeUtils.BitsToRegister(opcode & 0b111);
Length = 2;
Cycles = (target == Register.M) ? 16 : 8;
TickAccurate = target == Register.M;
Disassembly = (left ? "rl" : "rr") + (useCarry ? "c" : "") + " " + OpcodeUtils.RegisterToString(target);
}
public LD(Gameboy parent, byte opcode) : base(parent)
{
source = OpcodeUtils.BitsToRegister(opcode & 0b111);
target = OpcodeUtils.BitsToRegister((opcode & 0b111000) >> 3);
Cycles = source == Register.M || target == Register.M ? 8 : 4;
if (target == Register.M || source == Register.M)
{
TickAccurate = true;
}
Disassembly = "ld " + (target == Register.M ? "[hl]" : OpcodeUtils.RegisterToString(target)) + ", " + (source == Register.M ? "[hl]" : OpcodeUtils.RegisterToString(source));
}
public BIT(Gameboy parent, byte opcode) : base(parent)
{
target = OpcodeUtils.BitsToRegister(opcode & 0b111);
bit = (byte)((opcode & 0b111000) >> 3);
Cycles = target == Register.M ? 12 : 8;
Length = 2;
TickAccurate = true;
actionTick = 4;
Disassembly = "bit $" + bit.ToString("X2") + ", " + (target == Register.M ? "[hl]" : OpcodeUtils.RegisterToString(target));
}