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The EI instructions is actually a deferred instruction

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This commit is contained in:
Adrian Conlon
2025-08-10 21:47:15 +01:00
parent d4775cb266
commit 25ca534186
1 changed files with 10 additions and 1 deletions
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11
LR35902/LR35902.cs
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@@ -56,6 +56,8 @@ namespace LR35902
private bool Stopped { get; set; }
private bool _deferredInterruptEnable;
#region MWR pin
public event EventHandler<EventArgs>? RaisingMWR;
@@ -194,6 +196,12 @@ namespace LR35902
{
this.prefixCB = false;
if ( this._deferredInterruptEnable)
{
this.EnableInterrupts();
this._deferredInterruptEnable = false;
}
if (this.MaskedInterrupts != 0)
{
if (this.IME)
@@ -227,6 +235,7 @@ namespace LR35902
this.RaiseWR();
this.RaiseRD();
this.RaiseMWR();
this._deferredInterruptEnable = false;
}
protected override void HandleRESET()
@@ -830,7 +839,7 @@ namespace LR35902
this.DisableInterrupts();
break;
case 7: // EI
this.EnableInterrupts();
this._deferredInterruptEnable = true;
break;
default:
break;