Re: [pups] 2.11BSD disklabel-programm - TUHS

19 Jan 2002

On Jan 19, 12:43, lothar felten wrote:

...
  i don´t know if this is a hardware (bus?)
 error, or maybe the tape is bad.
 the tapes i use are unused original dec TK50
 tapes, i made several ones, because i thought
 it might be a tape error, but
 all tapes are the same.

 hardware:
 PDP-11/83, 4megs of ram, TK50, two RD54
 (maxtor), two RL02 disks.
 qbus cards (top to bottom):
 *cpu (quad)
 *memory (quad)
 *controller for RL02 disks (quad)
 *controller for RD54 disks (double)
 *controller for TK50 (double)
 *network controller (double) 
FWIW, I don't know about the tape error, but that layout looks OK apart
from the fact that if it's an 11/83, the memory shold be in the first slot
and the CPU in the second.  The essential difference between an 11/73 and
an 11/83 is that the 11/83 uses PMI memory.  Assuming your backplane is the
right one, in a BA23 or BA123 box, and that your memory is a single 4MB
board, you should swap them round, otherwise what you actually have is an
11/73.

I assume your RD54 controller is a genuine DEC RQDX3, so it's in the right
place.  It's possible you have an old version of the firmware on it, but it
should still work even if you do.

...
  i didn´t find a kind of terminator, but i
 didn´t change the order of the
 cards since i picked the box up.
 there are no empty slots between the cards,
 and i´m not sure if the Qbus
 need a special terminator. 
There normally isn't an extra terminator in an 11/73 or 11/83, unless you
add an expansion backplane.

-- 
Pete						Peter Turnbull
						Network Manager
						University of York