diff --git a/demosplash/pt3_lib_mockingboard.s b/demosplash/pt3_lib_mockingboard.s
index 63c4054a..95718cc1 100644
--- a/demosplash/pt3_lib_mockingboard.s
+++ b/demosplash/pt3_lib_mockingboard.s
@@ -297,8 +297,10 @@ done_apple_detect:
 	sta	$03ff
 
 	;============================
-	; Enable 50Hz clock on 6522
+	; Enable 60Hz clock on 6522
 	;============================
+	; yes this is horrible for PT3 files
+	; but in our case we are matching the screen refresh
 
 	sei			; disable interrupts just in case
 
@@ -311,14 +313,17 @@ done_apple_detect:
 	sta	$C40D		; IFR: 1100, enable interrupt on timer one oflow
 	sta	$C40E		; IER: 1100, enable timer one interrupt
 
-	lda	#$E7
+	lda	#$1A
 	sta	$C404		; write into low-order latch
-	lda	#$4f
+	lda	#$41
 	sta	$C405		; write into high-order latch,
 				; load both values into counter
 				; clear interrupt and start counting
 
-	; 4fe7 / 1e6 = .020s, 50Hz
+
+	; 9c40 / 1e6 = .040s, 25Hz
+        ; 4fe7 / 1e6 = .020s, 50Hz
+        ; 411a / 1e6 = .016s, 60Hz
 
 	rts