Interrupts.cs

using System;

namespace BizHawk.Emulation.Cores.Components.Z80
{
	public partial class Z80A
	{
		private bool iff1;
		public bool IFF1 { get { return iff1; } set { iff1 = value; } }

		private bool iff2;
		public bool IFF2 { get { return iff2; } set { iff2 = value; } }

		private bool interrupt;
		public bool Interrupt { get { return interrupt; } set { interrupt = value; } }

		private bool nonMaskableInterrupt;
		public bool NonMaskableInterrupt
		{
			get { return nonMaskableInterrupt; }
			set { if (value && !nonMaskableInterrupt) NonMaskableInterruptPending = true; nonMaskableInterrupt = value; }
		}

		private bool nonMaskableInterruptPending;
		public bool NonMaskableInterruptPending { get { return nonMaskableInterruptPending; } set { nonMaskableInterruptPending = value; } }

		private int interruptMode;
		public int InterruptMode
		{
			get { return interruptMode; }
			set { if (value < 0 || value > 2) throw new ArgumentOutOfRangeException(); interruptMode = value; }
		}

		private bool halted;
		public bool Halted { get { return halted; } set { halted = value; } }

		public Action IRQCallback = delegate() { };
		public Action NMICallback = delegate() { };

		private void ResetInterrupts()
		{
			IFF1 = false;
			IFF2 = false;
			Interrupt = false;
			NonMaskableInterrupt = false;
			NonMaskableInterruptPending = false;
			InterruptMode = 1;
			Halted = false;
		}

		private void Halt()
		{
			Halted = true;
		}
	}
}