25 Feb
2022
25 Feb
'22
7:02 a.m.
-----Original Message-----
From: cctalk <cctalk-bounces at classiccmp.org> On Behalf Of Noel Chiappa via
cctalk
Sent: Monday, February 21, 2022 10:19 AM
To: cctalk at classiccmp.org
Cc: jnc at mercury.lcs.mit.edu
Subject: Re: Is The M9312 Boot Module Essential?
...
Since the M9302 appears in EK-11034-OP-PRE2, with SACK turnaround, I
deduce that
the M8264 was
produced _after_ that came out, and post-dates the
M9302, to fix the
potential CPU hang issue I
described - and was later dropped when the -11/34
switched to the KD11-EA,
with that circuit built in.
...
Noel
Note that the RICM has an 11/34 configuration that reports a KD11-EA with a
M8264 "KD11-D/E". And a M9302 at the bus far-end.
See:
https://www.ricomputermuseum.org/collections-gallery/equipment/dec-pdp-11-34
_-2
-----
paul