Re: The Hidden Front Panel of the IBM 5100

Article View: alt.folklore.computers

Article #625433

Back to alt.folklore.computers Previous Next

#625433

From: Christian Corti
Date: Wed, 01 Aug 2018 07:40

12 lines
1977 bytes

Quadibloc <jsa...@ecn.ab.ca> wrote:
> The IBM 5100 had a switch, Registers/Normal, that changed its built in CRT from 
> displaying the dialog between the user and the program running to displaying the 
> CPU's internal registers.

To be more precise, it's only a coincidence that you can see the
internal registers. Technically, you see the first 512 bytes of the RWS,
but the registers are memory mapped (16 words for each IL, 64 words total)
at X'0000, they are implemented separately on the CPU card with two 64x9
bit TTL RAMs.

Christian

Technical Details

Message-ID: <co483f-jjb.ln1@news.informatik.uni-stuttgart.de>

Path:

mbox-mo1.pugleaf.net!i6-v6ni7654wmf.0!nntp.google.com!goblin3!goblin2!goblin.stu.neva.ru!news.unit0.net!news.uni-stuttgart.de!news.informatik.uni-stuttgart.de!.POSTED!not-for-mail

References: <e0b778ab-2c5a-45b0-8ec8-a5bcb5745cf3@googlegroups.com>

Show Full Headers

Complete Article Headers

X-Received: by 2002:a1c:4e0f:: with SMTP id g15-v6mr640780wmh.0.1533111602225;        Wed, 01 Aug 2018 01:20:02 -0700 (PDT)
X-BeenThere: alt.folklore.computers@googlegroups.com
Received: by 2002:adf:df10:: with SMTP id y16-v6ls5417897wrl.1.gmail; Wed, 01 Aug 2018 01:20:01 -0700 (PDT)
X-Received: by 2002:a5d:52c1:: with SMTP id r1-v6mr2813313wrv.0.1533111601584;        Wed, 01 Aug 2018 01:20:01 -0700 (PDT)
MIME-Version: 1.0
Path: mbox-mo1.pugleaf.net!i6-v6ni7654wmf.0!nntp.google.com!goblin3!goblin2!goblin.stu.neva.ru!news.unit0.net!news.uni-stuttgart.de!news.informatik.uni-stuttgart.de!.POSTED!not-for-mail
From: Christian Corti <u...@reply.to>
Newsgroups: alt.folklore.computers
Subject: Re: The Hidden Front Panel of the IBM 5100
Date: Wed, 1 Aug 2018 09:40:28 +0200
Organization: Kompetenzzentrum fyr Minimal- und Retrocomputing
Lines: 12
Message-ID: <co483f-jjb.ln1@news.informatik.uni-stuttgart.de>
References: <e0b778ab-2c5a-45b0-8ec8-a5bcb5745cf3@googlegroups.com>
Reply-To: c...@corti-net.de
NNTP-Posting-Host: p54abc0a4.dip0.t-ipconnect.de
X-Trace: inf1.informatik.uni-stuttgart.de 1533111001 5467 84.171.192.164 (1 Aug 2018 08:10:01 GMT)
X-Complaints-To: use...@news.informatik.uni-stuttgart.de
NNTP-Posting-Date: Wed, 1 Aug 2018 08:10:01 +0000 (UTC)
User-Agent: tin/2.4.1-20161224 ("Daill") (UNIX) (Linux/3.16.0-4-amd64 (x86_64))
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit

Reply to Parent Message