11 Oct
2010
11 Oct
'10
5:02 p.m.
Correction The System/3 was the first RPG II machine and the System/34 also used RPG II
whereas the System/38 introduced RPG III,? The problem with the logic cycle was that it
didn't fit well into the interactive model environment.? Interestingly Honeywell
(Italy I think) introduced a RPG III compiler for their DPS System 4000 IDBS4 was their
attempt at a relational database as found on System/38.? THe IBM 360/20 was the
predecessor to the System/3 and unlike the other 360's was a 16 bit machine with a
reduced instruction set.
Russ
--- On Mon, 10/11/10, Rich Alderson <RichA at vulcan.com> wrote:
From: Rich Alderson <RichA at vulcan.com>
Subject: RE: IBM System 3 / was Re: VTL/Dutchess logic
To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at
classiccmp.org>
Date: Monday, October 11, 2010, 2:51 PM
From: William Donzelli
Sent: Monday, October 11, 2010 11:36 AM
> Just curious about the architecture: at the
programmer's level did it look
> like a primarily 8-bit machine, or a 16-bit machine which always processed 2
> bytes in sequence, or it would best be described as mixed 8/16?
S/3s worked with strings of bytes in memory,
basically. Very non-traditional.
Not for IBM.? The 1401 was very much a character-oriented machine.
The S/3 was not, in general, programmed by user programmers in anything other
than RPG III, which went on to be the programming model for the System/3x and
AS 400 families; IIRC the original RPG was a 1401 program product.
Rich Alderson
Vintage Computing Sr. Server Engineer
Vulcan, Inc.
505 5th Avenue S, Suite 900
Seattle, WA 98104
mailto:RichA at vulcan.com
mailto:RichA at LivingComputerMuseum.org
http://www.PDPplanet.org/
http://www.LivingComputerMuseum.org/