OT Plugging : HP Integral IPC on ebay

Sue, but I believe CS/80 exerciser software is available for the HP9000/200 machines (which includes the 9826), and that it has much the same functionality as the HP85 version. The HP9000/200 machines have (to me) many advantages over the HP85 series, including an easier-to-use system bus (the HP85 bus is just strange, the HP9000/200 bus is the 68000 bus with a few more signals), easier to repair (about the only stnadard chips in an HP85 are the DRAMs, the 9000/200 machines are almost all standard, with a few PALs and ROMs) and a nicer selection of I/O cards. I am not sure what you are asking. I have (unofficial) schematics of the HP65, along with almost all other (repairable) HP handhelds. The card reader had has 5 wires which are soldered to the card reader PCB, but you say it's not that end you're interested in. Every head I've seen has been potted in epoxy, so you can't see how the wires are connected at that end, or indeed resolder them. What are you trying to do? I might well be able to help. Incidentally, why is this OT? The HP65 is certainly a classic (pun intended). It's also, IMHO, a computer (the internal architecture is that of procrssor + RAM + ROM (albeit the ROM and RAM are on different (serial) buses; it is user programmable). I can't think of a sensible definition of computer which includes things like the KIM-1 and excludes the HP65. -tony