fix zpi

lythd · lythd · commit 13b68669d786 · 2025-02-16T00:37:21.000-05:00
diff --git a/src/CPU.java b/src/CPU.java
@@ -758,7 +758,7 @@ public void IZY() {
 	}
 
 	public void ZPI() {
-		short lowPointer = Bus.read(programCounter++);
+		short lowPointer = (short) (Bus.read(programCounter++) & 0x00ff);
 
 		addressAbsolute = (short)(Byte.toUnsignedInt(Bus.read((short)(lowPointer+1)))*256+Byte.toUnsignedInt(Bus.read(lowPointer)));
 	}

Original file line number	Diff line number	Diff line change
`@@ -758,7 +758,7 @@ public void IZY() {`
`758`	`758`	`}`
`759`	`759`
`760`	`760`	`public void ZPI() {`
`761`		`- short lowPointer = Bus.read(programCounter++);`
	`761`	`+ short lowPointer = (short) (Bus.read(programCounter++) & 0x00ff);`
`762`	`762`
`763`	`763`	`addressAbsolute = (short)(Byte.toUnsignedInt(Bus.read((short)(lowPointer+1)))*256+Byte.toUnsignedInt(Bus.read(lowPointer)));`
`764`	`764`	`}`