[rescue] Wanted: 8-bit ISA CGA or EGA card

[Barry Callahan]

The RAM countup doesn't mean the BIOS thinks the RAM is good. Just that 
it thinks it's there.

On 1/2/2015 11:31 AM, Steve Hatle wrote:
> Just a follow-up on this. I sourced a known good (and identical) CGA
> card, and
> the machine behaves exactly the same way, even with all other
> cards out of the
> system.
>
> Time, I guess, to start swapping around rows of RAM on the
> motherboard
> and see if I can isolate a fault there, but the machine does pass
> the
> RAM countup, and the jailbar/checkerboard display appears before that
> happens.
>
> I guess if they always worked, it wouldn't be as much fun :-)
> Happy New Year all,
>
> Steve
>
>
> -------- Original Message --------
> Subject:
> [rescue] Wanted: 8-bit ISA CGA or EGA card
> From: "Steve Hatle"
> Date: Tue,
> December 16, 2014 9:17 am
> To: rescue at sunhelp.org
>
> All,
>
> I got a freebie IBM XT
> (5160) that appears to have a bad CGA card in it.
>
>
> ...
>
> Symptoms on the "bad"
> card are that at power-on it puts up a "jail-bar"
> like pattern with some
> reverse flashing characters in it, and then will
> start to display the memory
> count and banner, but these are offset -
> best way to describe it is like the
> left "edge" of the screen is in the
> middle of the physical display. So - the
> banner text starts in the
> middle
> of the screen, and then wraps around to the
> left.
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