public void Dispatch(Cpu8086 cpu, OpCodeManager.Instruction instruction)
{
if (cpu.GetFlags().Has(FlagsRegister.Overflow))
{
cpu.Interrupt(4);
}
}
public void Dispatch(Cpu8086 cpu, OpCodeManager.Instruction instruction)
{
var value1 = (int)(((uint)cpu.GetRegister(Register.DX) << 16) | cpu.GetRegister(Register.AX));
int value2 = (short)InstructionHelper.GetInstructionValue(cpu, instruction.Flag, instruction.SegmentPrefix, instruction.Argument1, instruction.Argument1Value, instruction.Argument1Displacement);
if ((uint)value1 == 0x80000000 || value2 == 0)
{
cpu.Interrupt(0);
return;
}
var quotient = value1 / value2;
var remainder = value1 % value2;
if ((quotient & 0xFFFF) != quotient)
{
cpu.Interrupt(0);
return;
}
cpu.SetRegister(Register.AX, (ushort)quotient);
cpu.SetRegister(Register.DX, (ushort)remainder);
}
public void Dispatch(Cpu8086 cpu, OpCodeManager.Instruction instruction)
{
uint value1 = cpu.GetRegister(Register.AX);
uint value2 = (byte)InstructionHelper.GetInstructionValue(cpu, instruction.Flag, instruction.SegmentPrefix, instruction.Argument1, instruction.Argument1Value, instruction.Argument1Displacement);
if (value2 == 0)
{
cpu.Interrupt(0);
return;
}
var quotient = value1 / value2;
if (quotient > 0xFF)
{
cpu.Interrupt(0);
return;
}
var remainder = value1 % value2;
cpu.SetRegisterU8(Register.AL, (byte)quotient);
cpu.SetRegisterU8(Register.AH, (byte)remainder);
}
public void Dispatch(Cpu8086 cpu, OpCodeManager.Instruction instruction)
{
Debug.Assert(instruction.Argument1 == OpCodeManager.ARG_CONSTANT);
cpu.Interrupt((byte)instruction.Argument1Value, true);
}