64 Video Glitches
I'm disappointed with the quality of the Commodore 64 video display.
For example, when selecting black characters on a blue background,
every other character is badly smeared. Also, when executing a program,
small "birdies" appear randomly all over the screen. These are about
one pixel in height, three to eight pixels in width, and appear in the
same color as the characters.
Is there a fix for these problems?
Some colors don't seem to work well
together on the Commodore 64; you might try combinations of foreground
and background colors to see what works best on your machine.
If you are using a
TV set, look for solid connections (try wiggling things gently) and
make sure your TV/COMPUTER slide switch is firmly over to the COMPUTER
side. Try rearranging the cable which connects the computer to the TV
set: sometimes interference is picked up along the way. Even moving the
computer can often help.
On the other hand,
if you are using a monitor rather than a TV set, there are other things
for you to keep in mind. Commodore will soon be announcing a new
interface - and a new monitor - that should significantly improve
picture quality. Still on the subject of monitor interfaces, some users
find that they can get better character definition by a variation in
the wiring of the interface. Normally, pin 4 of the video connector is
used for video out on the Commodore 64: some users like the improved
contrast that may be achieved by connecting pin 1 (luminance) to pin 4
and then feeding the composite signal to their monitor.
We understand that
the screen hash that you call "birdies" can be eliminated completely by
the addition of a small capacitor to the video circuitry of the Commo
dore 64. Contact your dealer for further information.