25 Jan
2004
25 Jan
'04
1:01 p.m.
My apologies then, should have checked the reference materials. The only
time I was "Face-2-Face" with a PDP-8/A was during a short stint at
Racal-Milgo in Miama (1980-1981). That one definately used semiconductor
memory.
-----Original Message-----
From: cctalk-bounces(a)classiccmp.org
[mailto:cctalk-bounces@classiccmp.org]On Behalf Of William Maddox
Sent: Sunday, January 25, 2004 9:39 PM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: PDP Manual on eBay
David,
The PDP8/A did not use a microprocessor. It was TTL SSI/MSI like the 8/E,
though
ia different design and packaged more densely. The 8/A replaced some random
logic
with small ROMSs, and later models used semiconductor memory instead of
core.
All subsequent models, e.g., vT78 and DecMate, were microprocessor-based.
--Bill
----- Original Message -----
From: "David V. Corbin" <dvcorbin(a)optonline.net>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk(a)classiccmp.org>
Sent: Sunday, January 25, 2004 3:56 PM
Subject: RE: PDP Manual on eBay
Actually that (I am pretty sure) is a version that
focuses mainly on the
PDP-8/a which was microprocessor (rather than discrete component) based.
Earlier editions (which had more information on Flip-Chip based
designs),are
much more useful to those intersted in older
PDP-8's (/I /E /L /M /S).