24 Feb
2003
24 Feb
'03
9:24 a.m.
cctech-request(a)classiccmp.org schrieb am 24.02.2003:
Date: Mon, 24 Feb 2003 13:48:36 +0100
From: Andreas Freiherr <Andreas.Freiherr(a)Vishay.com>
Subject: Re: M9312 Bootstrap Questions
Jeffrey,
are you sure the 11/34 manual is talking about the M9312? - I seem to
remember that my copy describes the M9301, of which, IIRC, there are
-YA, -YB, and -YF versions.
Since all M9301s are completely different from the M9312, it would be no
surprise if you cannot match the switches between docs and hardware...
Andreas
Jeffrey Sharp wrote:
thinking back some 18-20 years, you are right on this comment that the -YA -Yb
-YF variationd appley to the M9301 only, that module has no easy upgradable
proms, but standard multiboot configurations.
The keydifference is that M9312 stores one PDP11 instruction in 4 consecutive
nibbles of the prom, therefoere 1 Prom = 1 Bootdevice.
The 9301 has a conventional structure where the 4 proms are placed adjacent and
each prom provides 4 bits of the program. Therefore if you modify the 9301, all
4 proms must be changed at the same time. I had to do it once, adding a new
device to the boot routine, splitting it into the roms, burn those and get it
to work, and I remember it was a tedious job.
Frank
Ok, I got my PDP-11/34 mounted in its rack and
have started to audit
jumpers, switches, etc. I am being cornfused by the M9312 bootstrap
terminator module.
First, I'm confused about what version of the module I have. My 11/34 user's
manual (EK-11034-UG-001 '77) talks about a -YA, -YB, and -YF version of the
board. My M9312 manual (EK-M9312-TM-003 '81) talks only in terms of
bootstrap ROM part numbers. The DIP switch references in the two documents
conflict, even differing on the switch settings necessary just to boot into
the console emulator.
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