From: cdl@mpl.ucsd.edu (Carl Lowenstein)
Subject: [pups] Re: A project--buiilding a device to plug into a PDP-11's bus
Date: Wed, 12 Nov 2003 19:42:05 -0800 (PST) [thread overview]
Message-ID: <200311130342.hAD3g5Z17144@opihi.ucsd.edu> (raw)
> Date: Thu, 13 Nov 2003 12:30:34 +1100 (EST)
> From: John Holden <johnh at psych.usyd.edu.au>
> To: pups at minnie.tuhs.org
> Subject: [pups]
> Re: A project--buiilding a device to plug into a PDP-11's bus
>
> Gregg C Levine wrote :-
>
> > I also recall that the processor in question at one point in its
> > lifespan, actually used the AM2901 family of bit-slice processors.
>
> DEC didn't use 2901's in central processors, but the FPU's for 11/34 and
> 11/44 used 16 of them to make the 64 bit data path for the FPU. They were
> also used in some peripherals like the KMC-11.
At one time there was a set of application notes that described how
to build a PDP11 clone out of AM2901 bit slices. I think that the
performance would have been approximately that of an 11/40, while
the time and effort and parts cost would have been prohibitive for
a one-off production.
It is barely possible that I have a set of those notes somewhere,
although it would take a very lucky random search to find them.
carl
--
carl lowenstein marine physical lab u.c. san diego
clowenst at ucsd.edu
next reply other threads:[~2003-11-13 3:42 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-11-13 3:42 Carl Lowenstein [this message]
-- strict thread matches above, loose matches on Subject: below --
2003-11-13 1:30 John Holden
2003-11-13 1:48 ` Gregg C Levine
2003-11-13 8:51 ` Jochen Kunz
2003-11-13 16:17 ` David Evans
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=200311130342.hAD3g5Z17144@opihi.ucsd.edu \
--to=cdl@mpl.ucsd.edu \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).