dongfeng
Veteran Member
I wonder if anyone can shed light onto my latest keyboard problem
My IBM XT has an original full-sized 102-key keyboard, it's identical to a Model M, except it is missing the LED panel as XT keyboards did not have support for them. Not long after I had the XT, it kept showing "xx 301" errors on bootup, but the keyboard worked properly. After a couple of days, it just shows "301" and I cannot use the keys. However! I can use the keyboard on my 486. The late XT 102-key keyboards autosensed between AT/XT standards.
Today I managed to get an identical keyboard! It was missing the SDL cable, but no problem as I have the one from the original keyboard.
It still gives the 301 error on the XT and I cannot type, exactly as the original had shown.
I tried this keyboard on my 5150, but also 301 error. I know only the later XT BIOS from 1986 supported 101/102 key keyboards, but I was wondering if it would work on an earlier machine, but just have some usless keys (like F11 and F12).
Anyway, to the point.
How can I tell if the keyboard is kaput, or if the XT motherboard somehow has a fried keyboard interface?
The confusing point is that the keyboard works perfectly on my 486!!! Otherwise I would suspect a faulty SDL cable.
Oh, it is confusing
My IBM XT has an original full-sized 102-key keyboard, it's identical to a Model M, except it is missing the LED panel as XT keyboards did not have support for them. Not long after I had the XT, it kept showing "xx 301" errors on bootup, but the keyboard worked properly. After a couple of days, it just shows "301" and I cannot use the keys. However! I can use the keyboard on my 486. The late XT 102-key keyboards autosensed between AT/XT standards.
Today I managed to get an identical keyboard! It was missing the SDL cable, but no problem as I have the one from the original keyboard.
It still gives the 301 error on the XT and I cannot type, exactly as the original had shown.
I tried this keyboard on my 5150, but also 301 error. I know only the later XT BIOS from 1986 supported 101/102 key keyboards, but I was wondering if it would work on an earlier machine, but just have some usless keys (like F11 and F12).
Anyway, to the point.
How can I tell if the keyboard is kaput, or if the XT motherboard somehow has a fried keyboard interface?
The confusing point is that the keyboard works perfectly on my 486!!! Otherwise I would suspect a faulty SDL cable.
Oh, it is confusing
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