Re: Old Keyboard Puzzle.
That definitely looks to be a clone of some of the earlier IBM XT/AT era boards - probably only in layout rather than the actual keyboard mechanicals. Exactly how much automatic compatibility it has inbuilt will depend quite a bit on when it was made and exactly what chipset has been used.
Northgate were one company who made some keyboards with onboard DIP switches which allowed a plethora of options to be configured, one of those in the case of some models included AT/XT modes.
I seem to have started to collect old and/or obscure keyboards at some point without noticing it...so if it winds up looking for a new home at any point I'd certainly be interested.
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