Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!mcsun!hp4nl!phigate!prle!prles2!nvpna1!manen
From: manen@nvpna1.prl.philips.nl (Rob van Manen)
Newsgroups: comp.sys.cbm
Subject: changing character color
Keywords: scrolling, character-color
Message-ID: <manen.656196919@nvpna1>
Date: 17 Oct 90 20:55:19 GMT
Sender: news@prles2.prl.philips.nl
Lines: 26


	Hi,

	My father's Commodore 64 has quite a strange problem. When the
characters on the screen scroll up, the color of the characters changes!
When e.g. I list a basic program of just a few lines, and the characters
are white on a blue background, the characters stay white. But when I
list a longer program, so that the lines scroll off the screen, the
color of the characters changes from the white cursor-color to mostly
black, though other colors appear also. When you pause the listing, or
break it, the color of the characters on the screen remains the same.
We thought that perhaps the color-ram was broken, but the fact that
the colors stay the same when the screen does not change, indicates that
the video processor can read the ram correctly. With a basic test
program however, with which we write a value into the color-ram, and
read it back again, the value we read back is often not correct.

	If someone out there could tell us what to do about this
annoying problem, we would be very grateful.

	Thanks, 

		Rob van Manen.
Rob van Manen. | email - manen@apolloway.prl.philips.nl    or
               |         manen%nvpna1.prl.philips.nl@uunet.uu.nl
               | SERI  - manen:nlwaya01 or MANEN:NVPNASA