On Oct 8, 9:52, Patrick Finnegan wrote: option) up/ module, get You mean a dual-height KDF11-A ? I'm not sure if it'll work with that; it's designed to work with a quad-height KDF11-B or an 11/24. The same FPF11 works in 11/23 Qbus and 11/24 Unibus systems, and MINC systems. You ought to have a 40-way ribbon cable with a 40-way (2x20) female header on one end and a 40-pin DIL header (to fit into a normal 40-pin DIL IC socket) on the other. If it didn't come with that, you only have half the system and you should claim a 50% rebate from whoever sold it to you. Failing that, it's in a dangerously incomplete state, and you should probably send it to me for safe disposal... QBus fitting: The 40-pin DIL header goes into slot 2 on the KDF11-B -- that's the 40-pin socket next to the CPU chip, nearest the centre of the board -- with the red stripe (which marks pin 1) on the side of the cable furthest from the edge connector fingers, and the cable exiting from the plug/socket towards the centre of the PCB. Fold the cable back over the DIL plug and the CPU chip, then fold at right angles so the cable comes off towards the back of the KDF11-B board with the red stripe on the left (as you look into the backplane from the back of the machine with Slot 1 at the top). The 40-pin female header fits onto J1 of the FPF11 with the red stripe on the left, and the FPF11 fits into Slot 2 of the backplane. Ditto for a MINC. Unibus fitting: The 40-pin DIL header goes into slot 7 (may also be marked E4) on the KDF11-B -- that's the 40-pin socket nearest the Row A side of the board -- with the red stripe (which marks pin 1) on the side of the cable nearest the Row F fingers, and the cable exiting from the plug/socket towards the edge connector fingers. Fold the cable back over itself and pass it over the back of the CPU card. Then give it a half-twist so the red stripe is now nearest Row A, fit it to J1 on the FPF11 and fit the FPF11 in Rows A...D of the first slot *after* the memory cards. The order of cards on the bus should be: ------------- 11/24 CPU ----------- ------ Unibus Map (or memory) ----- --------------- memory ------------ --------------- memory ------------ --------------- memory ------------ --------------- memory ------------ ---------- FPF11 ------ (empty) terminator or jumper Jumpers: There are 12 jumpers labelled W1...W12. W6 and W9 are always fitted. W1,W2 are near the edge fingers for Row A. W3 is near the fingers for Row B. W4,W5 are near the fingers for Row C. W6 is near the back of the board between Rows C and D. W7,W8,W11,W12 are near the fingers for Row D. W9,W10 are near the back of the board opposite Row D. Jumper: W1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 Unibus: R R I R R I I I I R I I QBus: I I R I I I R R I I R R (I = inserted R = removed) -- Pete Peter Turnbull Network Manager University of York