I've been studying aspects of the IBM 5110 recently (like replacing the PSU), and I think I have the info needed to make a replacement keyboard (i.e. what voltages are needed across the parallel pin of the keyboard). I've posted those measurements here:
https://forum.vcfed.org/index.php?threa ... st-1258587
I'll see this summer if I can get a keyboard substitute working. It may be possible just using Python from a modern PC and use the parallel port as a proxy input-device. Alternatively, of using an Arduino, any ideas of a small-ish (~73 key) that might fit in the 5110 chassis (inside its 4 mounting holes that secures the keyboard in place).
Or curious if anyone has explored doing this already. I haven't seen the KBD_P values posted anywhere.
IBM 5100/5110 keyboard KBD_P values
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