From f1478d776b887261feb003c73551935424d7e559 Mon Sep 17 00:00:00 2001
From: Irmen de Jong <irmen@razorvine.net>
Date: Fri, 5 Feb 2021 18:09:21 +0100
Subject: [PATCH] fix vertical line highres 4color

---
 compiler/res/prog8lib/cx16/gfx2.p8 | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/compiler/res/prog8lib/cx16/gfx2.p8 b/compiler/res/prog8lib/cx16/gfx2.p8
index ae82d4d77..bb9d6822c 100644
--- a/compiler/res/prog8lib/cx16/gfx2.p8
+++ b/compiler/res/prog8lib/cx16/gfx2.p8
@@ -410,7 +410,19 @@ _done
                 repeat height {
                     ubyte value = cx16.vpeek(lsb(cx16.r1), cx16.r0) & mask | color
                     cx16.vpoke(lsb(cx16.r1), cx16.r0, value)
-                    cx16.r0 += 640/4
+                    %asm {{
+                        ; 24 bits add 160 (640/4)
+                        clc
+                        lda  cx16.r0
+                        adc  #640/4
+                        sta  cx16.r0
+                        lda  cx16.r0+1
+                        adc  #0
+                        sta  cx16.r0+1
+                        bcc  +
+                        inc  cx16.r1
++
+                    }}
                 }
             }
         }