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Correct a couple of small LR35902 timing issues.

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Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
This commit is contained in:
Adrian Conlon 2019-08-12 18:33:33 +01:00
parent 2b3bc80f8a
commit 583c5444a0
1 changed files with 7 additions and 2 deletions
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9
LR35902/LR35902.cs
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@ -60,6 +60,7 @@ namespace EightBit.GameBoy
this.ExecuteOther(x, y, z, p, q); this.ExecuteOther(x, y, z, p, q);
} }
System.Diagnostics.Debug.Assert(this.Cycles > 0, $"No timing associated with instruction (CB prefixed? {this.prefixCB}) 0x{this.OpCode:X2}");
return this.ClockCycles; return this.ClockCycles;
} }
@ -365,7 +366,7 @@ namespace EightBit.GameBoy
break; break;
case 3: // JR d case 3: // JR d
this.JumpRelative((sbyte)this.FetchByte()); this.JumpRelative((sbyte)this.FetchByte());
this.Tick(4); this.Tick(3);
break; break;
case 4: // JR cc,d case 4: // JR cc,d
case 5: case 5:
@ -715,7 +716,11 @@ namespace EightBit.GameBoy
case 1: case 1:
case 2: case 2:
case 3: case 3:
this.JumpConditionalFlag(y); if (this.JumpConditionalFlag(y))
{
this.Tick();
}
this.Tick(3); this.Tick(3);
break; break;
case 4: // GB: LD (FF00 + C),A case 4: // GB: LD (FF00 + C),A