Re: PDP 11/40 system manual

Article View: alt.folklore.computers

Article #625506

Back to alt.folklore.computers Previous Next

#625506

From: Quadibloc
Date: Sat, 11 Aug 2018 17:25

14 lines
2109 bytes

On Friday, August 10, 2018 at 4:10:47 PM UTC-6, John Levine wrote:
 
> The PDP-8, on the other hand, was close to perfectly elegant.

The Honeywell H-112, which, unfortunately, was only implemented once, and that 
in a serial machine like the PDP-8/S, had it beat in one way.

It didn't reserve an entire 3-bit opcode for input-output instructions, but put 
them in with the operate microinstructions.

Because of that, instead of DAC and TAD, in addition to an addition instruction, 
it could also have a load instruction and a store instruction.

John Savard

Technical Details

Message-ID: <313acf92-8783-4412-ad1e-3f7c225f74a1@googlegroups.com>

Path:

mbox-mo1.pugleaf.net!g23-v6ni739qtp.0!nntp.google.com!e8-v6no1764364qtp.0!postnews.google.com!glegroupsg2000goo.googlegroups.com!not-for-mail

References:

<21aaeee8-c41a-4442-a4eb-ea6a29b1e4f1@googlegroups.com> <mdd7ekzl6pr.fsf@panix5.panix.com> <pki8ae$ca0$1@dont-email.me> <1028478389.555543171.735142.peter_flass-yahoo.com@news.eternal-september.org> <pkl2h6$abc$2@gal.iecc.com>

Show Full Headers

Complete Article Headers

X-Received: by 2002:a37:10d5:: with SMTP id 82-v6mr5665076qkq.62.1534008345518;        Sat, 11 Aug 2018 10:25:45 -0700 (PDT)
X-BeenThere: alt.folklore.computers@googlegroups.com
Received: by 2002:a37:d443:: with SMTP id l64-v6ls7943315qki.0.gmail; Sat, 11 Aug 2018 10:25:44 -0700 (PDT)
X-Received: by 2002:a37:dd46:: with SMTP id n67-v6mr6544055qki.32.1534008344612;        Sat, 11 Aug 2018 10:25:44 -0700 (PDT)
X-Received: by 2002:a81:63d5:: with SMTP id x204-v6mr245176ywb.5.1534008344403; Sat, 11 Aug 2018 10:25:44 -0700 (PDT)
Path: mbox-mo1.pugleaf.net!g23-v6ni739qtp.0!nntp.google.com!e8-v6no1764364qtp.0!postnews.google.com!glegroupsg2000goo.googlegroups.com!not-for-mail
Newsgroups: alt.folklore.computers
Date: Sat, 11 Aug 2018 10:25:44 -0700 (PDT)
In-Reply-To: <pkl2h6$abc$2@gal.iecc.com>
Complaints-To: groups...@google.com
Injection-Info: glegroupsg2000goo.googlegroups.com; posting-host=24.114.42.107; posting-account=1nOeKQkAAABD2jxp4Pzmx9Hx5g9miO8y
NNTP-Posting-Host: 24.114.42.107
References: <21aaeee8-c41a-4442-a4eb-ea6a29b1e4f1@googlegroups.com> <mdd7ekzl6pr.fsf@panix5.panix.com> <pki8ae$ca0$1@dont-email.me> <1028478389.555543171.735142.peter_flass-yahoo.com@news.eternal-september.org> <pkl2h6$abc$2@gal.iecc.com>
User-Agent: G2/1.0
MIME-Version: 1.0
Message-ID: <313acf92-8783-4412-ad1e-3f7c225f74a1@googlegroups.com>
Subject: Re: PDP 11/40 system manual
From: Quadibloc <jsa...@ecn.ab.ca>
Injection-Date: Sat, 11 Aug 2018 17:25:44 +0000
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit

Reply to Parent Message