Wanted: some HP 9000/3xx bits

I can't help with the rest of it (being much more an HP9000/200 person) but I know a little about these... Yes, DIO-I. It's the same physical connector as S100 bus (and HP actally stated this somewhere), but oviously different pinouts/signals. It's basically the plain 68000 bus with signals for DMA, etc. The 98626 is a fairly simple RS232 port based, oddly, on the 8250 chip. The 50 pin connector is a stnadard-for-HP pinout, but that pinout takes some tracking down. IIRC it's in some of the _software_ manuals, BASIC and Pascal on hpmuseum,net. Or I can find it if you need it (I am pretty sure I have the scheamtic for this board). The internals of that keyoard are a little strage. I took one apart (IIRC, there are screws under the bottom lable), and removed a small encoder PCB containing a custom HP chip linked to an E2PROM (which, IIRC, stores the ID word, which is different for different key layouts), along with the key matrix itself. Connecting an ohmmeter to the 'tails' of that showed no noticable continuity when I presed on the appropriate area of the matrix, but using a _capacitance_ meter showed an increase in capacitance. I then looked up the 2 patent numbers on the matrix assembly, to finf they refered to a capacitve keyoard 'switch'. It's the only keyboard I've seen that works like this. -tony