Disk drive parts

[Tony Duell]

> >I thought the manuals were on bitsavers. The PSU pinout should be in 
> >there.
> 
>    Yes, the manuals are on Bit-savers but IIRC they don't recall them
> giving any details about the PSU.

I will admit that I've not looked at the manuals on Bitsavers, because I 
have a real printed manual (actually the DRI version, but it's the same 
drive). That manual has a section on the PSU, I assumed the Diablo one 
did too.

I assume the manual contains a schematic of the drive. If you can't find 
the pinout of the power connector from that, they you can easily buzz out 
the connections from the pins on the connector on your drive to the 
various voltage rails on the drive mainboard. As I said I think there are 
only 3 connections ot the PSU (with multiple pins for each), ground, 
+15V, -15V. 



> >The Diablo terminator is a PCB stuffed with resistors soldered to the 
> >connector. There's a +5V pin on the connector to power the terminator, of 
> >course. I have _one_ of them, I also have 2 drives and the 
> >interconnecting cables, so it's not up for grabs.
> 
>    Do you have schematics for any of those?

Probably, but you don't need them. I'd try a 180 Ohm resistor from each 
signal to +5V and a 390 Ohm from each signal to ground. The pinout of the 
connector should be in the manual.

-tony