From b67c3c41e15ba4357d248b7f2e79118a57bb76aa Mon Sep 17 00:00:00 2001
From: OBattler <oubattler@gmail.com>
Date: Sun, 5 Feb 2023 17:16:53 +0100
Subject: [PATCH] Fixed (S)VGA timings, according to tests by Sergi.

---
 src/video/vid_svga.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/video/vid_svga.c b/src/video/vid_svga.c
index 8b61bf395..704c6f612 100644
--- a/src/video/vid_svga.c
+++ b/src/video/vid_svga.c
@@ -455,7 +455,8 @@ svga_recalctimings(svga_t *svga)
     svga->hdisp++;
 
     svga->htotal = svga->crtc[0];
-    svga->htotal += 6; /*+6 is required for Tyrian*/
+    /* +5 has been verified by Sergi to be correct - +6 must have been an off by one error. */
+    svga->htotal += 5; /*+6 is required for Tyrian*/
 
     svga->rowoffset = svga->crtc[0x13];