# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1323214732 -3600
# Node ID c0513d77761f9b22aacbda38e5024ce48b72d284
# Parent  d8c0798e4acd06593f28efefefae7e8d7242d44c
Permit vertical scrolling by amounts smaller than a character row.

diff -r d8c0798e4acd -r c0513d77761f ula.py
--- a/ula.py	Tue Dec 06 00:28:16 2011 +0100
+++ b/ula.py	Wed Dec 07 00:38:52 2011 +0100
@@ -108,7 +108,7 @@
         "Signal the start of a frame."
 
         self.line_start = self.address = self.screen_start
-        self.line = 0
+        self.line = self.line_start % LINES_PER_ROW
         self.ysub = 0
         self.ssub = 0
         self.reset_horizontal()
@@ -300,7 +300,7 @@
     update(a, ula)
     mainloop()
 
-    ula.screen_start = 0x5800 - 320
+    ula.screen_start = 0x3000 + 2
     update(a, ula)
     mainloop()