From 9b3b652fa54093d9e937c22fd8deb0d082094bb8 Mon Sep 17 00:00:00 2001
From: ZeroByteOrg <thatguy@zerobyte.org>
Date: Mon, 8 Aug 2022 15:17:28 -0500
Subject: [PATCH] Switched to using tmp1 instead of self-mod to store the
 jiffies value

---
 libsrc/cx16/waitvsync.s | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/libsrc/cx16/waitvsync.s b/libsrc/cx16/waitvsync.s
index 9cd1824cf..f8828eec2 100644
--- a/libsrc/cx16/waitvsync.s
+++ b/libsrc/cx16/waitvsync.s
@@ -10,15 +10,15 @@
 ;
 
         .export         _waitvsync
+        .importzp       tmp1
 
 .proc _waitvsync: near
       RDTIM = $FFDE  ; Kernal API for reading the jiffy timer
       jsr RDTIM
-      sta lastjiffy
+      sta tmp1
 keep_waiting:
       jsr RDTIM
-      cmp #$FF       ; self-mod the value returned by RDTIM to save memory
-      lastjiffy=(*-1)
+      cmp tmp1
       beq keep_waiting
       rts
 .endproc