IBM XT diagnostic ROM
dr.emiel at xs4all.nl
Wed May 28 02:10:58 CDT 2008
I have one, it's not IBM but third-party.
We used it to test XT's, I'll make you a image.
It is 64k but I'll check if it's readable.
And I should have the manual some where, but it's a very simple user
And it's does test the hardware.
Van: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org]
Namens Andrew Lynch
Verzonden: woensdag 28 mei 2008 3:37
Aan: cctalk at classiccmp.org
Onderwerp: IBM XT diagnostic ROM
Has anyone have or know where to get an IBM XT (5160) diagnostic ROM? I am
trying to revive an original IBM XT motherboard which is nonresponsive and
gives no error codes (beep or POST).
I am not even sure such a ROM exists but it would be a 27C256 style EPROM
that plugs into an IBM XT motherboard to help fault isolate an almost
completely dead unit.
The motherboard CPU seems to be working based on a quick exam with the
oscilloscope. However, the motherboard's initialization / boot process is
not making it to start up the video display before it hangs or crashes.
Obviously, something is broken but I haven't isolated exactly what yet.
If anyone can help, I would much appreciate it. Thank you in advance.
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