IBM XT diagnostic ROM

Andrew, 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 interface. And it's does test the hardware. Rik -----Oorspronkelijk bericht----- 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 Hi, 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. Andrew Lynch