At 04:05 PM 11/7/2006, you wrote:
Are you sure? It looks like the Tax Commission room in the basement
of the capital building. I am sure they had a 360-25 running DOS. We
had a 360-50 (my roommates machine x2) and ran both OS/MFT and 1401
emulation on it.
Let's see if we can get this straight.
The 360-20 was an early model of S/360, and only implemented a subset
of the operations. It had 16-bit addressing, rather than 24-bit, so
the address manipulation instructions were unique.
The -20 was upgradeable to faster models of -20, but never to any full 360.
The 360-25 was a late model of the 360 series, introduced in 1968 or
1969. It was unique in that its microcode was loaded from a deck of
punched cards, similarly to the way later 370s loaded theirs from
floppies. Microcode was available to make the -25 emulate a full
360, a 1401, or (I think) a -20. Concurrent operation in different
modes was not available, but it could certainly run DOS.
The 360-22 was a very late model of the 360 series, introduced after
the 370s were available (perhaps 1972?). The -22 was actually a
relabelled -30, to use of those which came back to IBM off
lease. Rightpondians, think of a Ford Popular. It was thus a full
member of the 360 series. -22s were popular to use as HASP
multi-leaving RJE workstations, because they could drive real 360 I/O
devices, most notably the 1403-N1.
[EMAIL PROTECTED] wrote:
It is a 360/20. the 360/25 was larger and the "upgrade" from there
was to a 360/mini-mod-22. the 360/25 would run 1401 emulation.
-----Original Message-----
From: Stephen Frazier [mailto:[EMAIL PROTECTED] Sent:
Tuesday, November 07, 2006 4:52 PM
To: [email protected]
Subject: Re: OT: S/360 hardware related.
That should be 360-50 not 36-50. :)
[EMAIL PROTECTED] wrote:
I recognize it. That is a 360-25 with a MFCU at one end and a
printer at the other. Back in the early 70's the Oklahoma Tax
Commission had one that ran an operating system called DOS that
later grew up to be z/VSE. My roommate was the systems
programmer/operator on it. I was working at OU at the time we had
a 36-50 that ran OS/MFT which is now called z/OS.
[EMAIL PROTECTED] wrote:
On page 50 of the Nov. 2006 issue of SC Magazine is a picture
that has been labeled a System/360.
I've seen a lot of S/360 pictures and have even been in the
presence of one, but I don't ever recall
a S/360 looking like this. Obviously, there is a printer and a
card reader in the picture. Is the unit
in the middle the controller for these devices? But on second
look, I can see the Emergency Pull and
the dials for setting addresses (IPL , etc.).
So, what S/360 is this unit used on?
Thanks,
Steve
Bob Shair
Open Systems Consulting
Champaign, Illinois
