From 788e914d7e259b42a9b58c667e2e4d8931b86fdd Mon Sep 17 00:00:00 2001
From: Ian C <ianc@noddybox.co.uk>
Date: Wed, 21 Jul 2021 20:07:13 +0000
Subject: Improved screen rendering so it runs full speed on the hardware.

---
 source/spec.c | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

diff --git a/source/spec.c b/source/spec.c
index e0698c2..6cdc7c6 100644
--- a/source/spec.c
+++ b/source/spec.c
@@ -200,13 +200,18 @@ static void DrawScanline(int y, int sline)
 
     y = fb->height - y - 1;
 
-    for(f = 0; f < fb->width; f++)
-    {
-        FB_ADDR(fb, f, y) = coltable[border].col;
-    }
-
     if (aline>=0 && aline<SCRL)
     {
+        for(f = 0; f < OFF_X; f++)
+        {
+            FB_ADDR(fb, f, y) = coltable[border].col;
+        }
+
+        for(f = OFF_X + 256; f < fb->width; f++)
+        {
+            FB_ADDR(fb, f, y) = coltable[border].col;
+        }
+
 	scr=line[aline];
 
 	for(f=0;f<TXT_W;f++)
@@ -244,6 +249,13 @@ static void DrawScanline(int y, int sline)
             }
 	}
     }
+    else
+    {
+        for(f = 0; f < fb->width; f++)
+        {
+            FB_ADDR(fb, f, y) = coltable[border].col;
+        }
+    }
 }
 
 
-- 
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