To recap the missing posts and catch up to where we, or at least I, last saw things:
The board is XT/AT switchable in case folks are afraid of that XT in the title - It is a complicated clicky white alps programmable board with nifty LCD calculator function over the num pad, though the calc part is apparently prone to fail about 50% of the time. No specifics on whether this is fixable or not. I have a 3001 and an 8000 and the lcd is very dim on one of them, but the 5001 is good (I didn't get it from this listing tho, And I've another 3001 that was in less than pristine condition that had a solar panel for powering the calc rather than a battery, which is apparently even more unusual.)
Barney - Does your calc work? (It takes a standard 2032 battery- the one in it is most likely toast by now.)
It needs adapters to work on ps2/usb ports as it only has the 5-pin DIN connector (cost about $3 tops). The same board (with minimal variations such as led indicator locations) had multiple model numbers: FK-9000, FK-5001, FK-5000 (FK-9001?) (3001,8000 also have the calculator, but not programmable.) If anyone needs it I do have a copy of the printed manual it came with; it isn't particularly illuminating, though.
Pretty stellar board if you like clicky. If it sticks around too long I'll have to buy the last one myself and wait until someone wants one REALLY bad enough to pay through the nose to get it (MWaahh hahahah!) Seriously though - used to be hard to find this until someone found a dozen or so in a storage unit and made my collectible rarity a bit less rare. If I had the extra cash laying about I'd have snagged it already as a backup. I think they will be scarce again in the near future, so I encourage any white Alps interested folks to pull the trigger on this before I scare up some money and do it myself...
Oh yeah - and double-shot keycaps.