Is here where one is supposed to file bug reports and problems?
In any case, I encountered some problems with my adapter. My setup is as following:
Victor Vicki 8088 (basically an XT clone) - adapter - PS/2 - KVM switch - PS/2 keyboard
The regular keys work fine, even including the Swedish characters ÅÄÖ. A few characters like <> and * are found at positions that perhaps resemble an XT keyboard more than an AT keyboard, but that is not a problem.
The numeric keypad also works for most of the time. I noticed the division key on the numeric board returns a minus sign just like the minus key does, but it may be a matter of misprogramming.
What does not work to satisfaction though are the cursor keys and the group of keys above: Insert, Delete, Home, End, Page Up and Page Down. All those 4 + 6 keys return numbers 0-9 just like the numeric keypad does, no matter the state of Num Lock.
I haven't checked the function keys, what codes they send. However while fiddling with the numeric keypad I noticed sometimes it manages to lock up the computer, to the point it won't accept any more input and just beeps. A soft reset Ctrl-Alt-Del however solves this, so apparently this key combination still works as expected.
Should I switch to an US keyboard layout on the XT clone and try the cursor keys again? Should I bypass the KVM and connect my keyboard directly to the adapter? Should I try an older AT style keyboard instead of PS/2? I do have some decent programmers which supposedly do most PICs and AVRs, so in case of reprogramming the chip with a newer version, I'm confident it could work.
Edit: Hm, it seems to be the same cursor key issue as Marrr reported earlier. Both of us supposedly use localized keyboard layouts, and while none of the US people seem to have noticed this before, it strikes me I definitely should try to reconfigure my XT to us an US keyboard layout for the first step of troubleshooting.