From: Michael Huth (520052975648-0001_at_t-online.de)
Date: 2003-02-10 23:08:25
Hello,
I got a C= PC1 lately from a friend. It has a Motorola 6845 as CRT
Controller. This controller
seems to be capable of a 80x25 Textmode and CGA Graphics. The Board has a
RGB Connector and a Composite-Video Connector and 4 DIP switches. The DIPs
seem to have an influence on the Video Signal.
The Problem is, I have only a TV or a BT878 based PC-TV card for Video
Input. I tried the Video Out with the TV and couldn't get a Sync. Also my
C128-RGB to Composite-Video Cable didn't worked.
With one DIP combination I could get a barely visible Screen with my PC-TV
Card. The PC1 itself seems to be ok (until it waits for a boot disk).
So do I really need some CGA Monitor or is there any way to get it working
with a usual TV (like the C128 RGB to Composite Video Cable). And what for
is the Video-Out, if it does not works with a TV ?
I am not that hardware freak. I am lucky that I got it working again with
some AT-Power Supply after the built-in broke down :-/.
Maybe these things help:
-There is a 15Mhz Quarz which seems to be for the DOT-Clock.
-The Video Out Signal seems to be generated with the help of some Resistor
Array (not the sync though).
Ciao...
...Michael
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