3 May
1999
3 May
'99
9:50 p.m.
In einer eMail vom 03.05.99 21:14:20, schreibt Tony:
<< >
I would like to connect a Plessey disk drive to a
PDP11 RK11-D controller.
The drive has a fixed platter and a removable platter, compatible to RK05
I
believe, and these numbers on it:
Plessey 3468-0231
PMDD/11B
700540-200217D
I saw (and did minor repair on) one of these about 8 years ago. It wasn't
mine, and I never saw a service manual :-(
It has a 42 pin MRA 42 S mating connector, and same with a terminator. I
believe the 42 pin should be a Drive Bus, to be connected with standard
Unibus cable to controller slot 2A/2B.
I seem to remember that the connector is similar (maybe identical) to the
Diablo Model 30 connector, which I do have the pinout of. I can post that
if it would help.
One thing I certainly remember is that it used 1-of-n selects (like an
RK02/Diablo model 30) and that it could only be linked directly to an
RK11-C controller. There was a Plessey paddleboard that went into the
drive connector slot on an RK11-D and had a decoder chip (at least, maybe
some other simple logic) on it to sort this out.
-tony
>
I would certainly appreciate the Diablo pinout - if the pin layout is the
same, I would expect the signals to be the same , at least something easier
to check stan starting from nothing !
Thanks
John