HP9154 hard disk drive pinout

I had been looking for this info for over 10 years, and I finally found it this morning while looking around hpmuseum.net for the manuals on the 9817. I looked at the service manuals for the 9153/9154, and found what is probably the only useful bit of info in those manuals (I really don't intend to use a torque wrench to tighten the top cover screws....) The HP9154 (certainly the later versions) use an HP hard disk drive with a single 40 pin power and data connector. It's a strange HP interface, with raw data and an 8 bit control bus. And from what I remember, one end goes to an ASIC on the 9154 cotnroller board, the other to an ASIC in the drive, so it's hard to work out what all the signals are... Anyway, from that manual, here's the pinout of the cable. Please save this soemwhere, if you need it, you _really_ need it.... 1 Rd Data 2 Gnd 3 Wr Data 4 Gnd 5 Wr Gate 6 Gnd 7 4MHz Clk 8 Gnd 9 Rd A-D converter 10 Gnd 11 +5V 12 Gnd 13 +5V 14 Gnd 15 +12V (Motor) 16 Gnd (Motor) 17 +12V (Motor) 18 Gnd (Motor) 19 Dr Sel 0 20 Dr Sel 1 21 Dr Sel 2 22 Dr Sel 3 23 Wr D-A Converter 24 NA/B 25 Sector Pulse 26 Index Pulse 27 Wr NIC Chip 28 Reset 29 +12V (Motor) 30 +12V (Motor) 31 Fault 32 +12V 33 Data Bus 7 34 Data Bus 0 35 Data Bus 6 36 Data Bus 1 37 Data Bus 5 38 Data Bus 2 39 Data Bus 4 40 Data Bus 3 -tony