Path: utzoo!attcan!uunet!samsung!dali.cs.montana.edu!milton!max!scott
From: scott@max.u.washington.edu
Newsgroups: comp.sys.cbm
Subject: Re: changing character color
Message-ID: <14474.271f60da@max.u.washington.edu>
Date: 20 Oct 90 03:23:54 GMT
References: <manen.656196919@nvpna1>
Organization: University of Washington, Seattle WA
Lines: 28

In article <manen.656196919@nvpna1>, manen@nvpna1.prl.philips.nl (Rob van Manen) writes:
>       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,
 
Sounds like a classic case of the power supply going faulty. Try borrowing
a working power supply for the C64 from a friend and see if that fixes it.
 
 
Sincerely,
Scott K. Stephen