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Turns out using lambdas to control pins is lovely and correct, but terribly slow. Back to a more traditional method.

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This commit is contained in:
Adrian Conlon
2025-03-24 20:18:04 +00:00
parent d4dc99b454
commit 3d6b549c76
12 changed files with 184 additions and 326 deletions
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33
M6502/Core.cs
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@@ -8,8 +8,14 @@ namespace M6502
{
using EightBit;
public abstract class Core(Bus bus) : LittleEndianProcessor(bus)
public abstract class Core : LittleEndianProcessor
{
protected Core(Bus bus)
: base(bus)
{
this.RaisedPOWER += this.Core_RaisedPOWER;
}
#region Pin controls
#region NMI pin
@@ -104,16 +110,22 @@ namespace M6502
[System.Diagnostics.CodeAnalysis.SuppressMessage("Design", "CA1030:Use events where appropriate", Justification = "The word 'raise' is used in an electrical sense")]
protected virtual void RaiseSYNC()
{
this.OnRaisingSYNC();
this.SYNC.Raise();
this.OnRaisedSYNC();
if (this.SYNC.Lowered())
{
RaisingSYNC?.Invoke(this, EventArgs.Empty);
this.SYNC.Raise();
RaisedSYNC?.Invoke(this, EventArgs.Empty);
}
}
protected virtual void LowerSYNC()
{
this.OnLoweringSYNC();
this.SYNC.Lower();
this.OnLoweredSYNC();
if (this.SYNC.Raised())
{
LoweringSYNC?.Invoke(this, EventArgs.Empty);
this.SYNC.Lower();
LoweredSYNC?.Invoke(this, EventArgs.Empty);
}
}
#endregion
@@ -190,7 +202,7 @@ namespace M6502
#endregion
protected override void OnRaisedPOWER()
private void Core_RaisedPOWER(object? sender, EventArgs e)
{
this.X = (byte)Bits.Bit7;
this.Y = 0;
@@ -199,7 +211,6 @@ namespace M6502
this.S = (byte)Mask.Eight;
this.LowerSYNC();
this.LowerRW();
base.OnRaisedPOWER();
}
#endregion
@@ -551,9 +562,7 @@ namespace M6502
private void FetchInstruction()
{
// Instruction fetch beginning
this.LowerSYNC();
System.Diagnostics.Debug.Assert(this.Cycles == 1, "An extra cycle has occurred");
// Can't use fetchByte, since that would add an extra tick.
@@ -561,8 +570,6 @@ namespace M6502
this.OpCode = this.ReadFromBus();
System.Diagnostics.Debug.Assert(this.Cycles == 1, "BUS read has introduced stray cycles");
// Instruction fetch has now completed
this.RaiseSYNC();
}