Path: csiph.com!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail From: Bob Martin Newsgroups: comp.sys.raspberry-pi Subject: Re: R Pi 0 Date: Mon, 30 Nov 2015 08:00:45 GMT Lines: 42 Message-ID: References: X-Trace: individual.net HVOnt5yriOP+9prU2u4AmQWWE4q6iB+usUMNrYLINn0kjAB7bI X-Orig-Path: BERLIN : news.individual.net Cancel-Lock: sha1:aYwHEHs0olAB7ejx/bGc5rYK01g= Xref: csiph.com comp.sys.raspberry-pi:10056 in 10111 20151129 113231 Martin Gregorie wrote: >On Sun, 29 Nov 2015 08:45:06 +0000, Bob Martin wrote: > >> in 10104 20151128 140017 Martin Gregorie >> wrote: >> >>>Wrong: 1900 - released in 1964 (same year as the IBM S/360) and, unlike >>>the IBM, all 1900 programs were effectively in-memory virtual machines >>>(all registers were the first few words of a program, all program >>>addresses zero bases in the image, unlike the S/360 where, prior to MVS, >>>all programs had to be compiled for the hardware address range it ran >>>in. >> >> I used all the OS/360 versions before MVS but I don't remember that. >> Compile/assemble was followed by linkedit step which created a >> relocatable module. > >I've only briefly used S/360 and/or S/370 (OS/MVT with SPFFY) but I >remember back in the late '60s hearing people complaining about the >inflexibility of S/360s running under DOS or OS/MFT because of the >requirement to link-edit programs for the memory partition they ran in. I think you must be referring to DOS which I know nothing about. The compile-linkedit system was in PCP from the beginning and unchanged through MFT I, MFT II and MVT. >IIRC DOS soon vanished, and was anyway only used on the smallest systems >(360/30 and the like) and by 1970 I think all the bigger ones were on OS/ >MVT, which worked as you describe. > >I didn't like SPFFY at all, but still have a quite a soft spot for >OS/400, which I used on AS/400 boxes. It was remarkably bug-free and CL, >its command language, was very regular and easy to use. The only drawback >on these systems was the ugly block-mode text editor and IBM's odd >insistence on using RPG3 - switch to PL/1 or COBOL and life was a lot >better. > > >-- >martin@ | Martin Gregorie >gregorie. | Essex, UK >org |