comp.lang.asm370 Google Group

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2008-10-09T12:55:23Z

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2008-10-08T08:54:59Z

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Chinese antique

2008-10-06T10:10:17Z

Re: Machine-Level Assembly Language

2008-09-10T20:01:48Z

The 155 and 165 were contemporaries. The 360/22 came out after them, but
I'd say it doesn't count, since the 22s were just recycled 30s, marketed
as fill-ins until the 370/115 and 370/125 were ready.

Re: Machine-Level Assembly Language

2008-09-08T19:45:39Z

. . .
I was involved in upgrading the storage on a 155 (last IBM mainframe
to use magnetic core storage?). I think an extra 512K was involved,
but it took much careful consideration over several months.
I couldn't help thinking of that many years later when I needed to
upgrade a PC and I went to a store in the small town I was staying in,

Re: Machine-Level Assembly Language

2008-09-06T04:09:51Z

That is correct. That's why it was called the "core-image library" --
because contents were, bit for bit, what would be loaded into core.
The DOS/360 linkage editor could read:
80-byte object decks, and
items from the "relocatable library".
The relocatable library mainly contained pre-assembled I/O modules and

Re: Machine-Level Assembly Language

2008-09-04T20:56:22Z

IIRC, no. It could only read object code, since it had no relocation
information and probably no symbol info either.
There was some utility that you used to "catalog" object decks to
produce a library of some sort. Don't remember what it was called.
I've worked very, very briefly in DOS/360 environments, many years

Re: Machine-Level Assembly Language

2008-09-04T05:27:31Z

I can remember when a decision was made to upgrade a 370/168 from 2MB to
4MB. The systems programmers wanted to upgrade the default region size
from 108K to 384K. Operations practically revolted at the thought until
we were able to demonstrate that that there was plenty of memory to do
it and compiles and assemblies ran so much faster because they didn't

Re: Machine-Level Assembly Language

2008-09-04T02:22:03Z

(snip)
I thought 64K was a small 360/40.
I remember some discussion on the overlay feature of
the link editor, and someone disagreed with a statement
I made about it. Sometime later I figured it must have
been the DOS/360 link editor that worked differently.
The OS/360 linker can read its own output (load module).

Re: Machine-Level Assembly Language

2008-09-03T03:27:33Z

Many have, to the extent that it can be done without breaking
compatibility, and, of course, most new features that are added are as
similar to their MVS versions as possible. But, alas, the more systems
grow, the more labor has to be invested to convert, so it always seems
easier not to bite the bullet just yet.

Re: Machine-Level Assembly Language

2008-09-02T21:45:08Z

I gotta agree the c***** features of DOS/360 should have been
fixed long ago (for all I know they have been fixed). I was
always an OS/360 type.

Re: Machine-Level Assembly Language

2008-09-02T21:15:34Z

Really small by today's standards. The bank I worked at had a 360/40
and a 360/50, IIRC the 40 has 128kB and the 50 256kB. We actually ran
OS/360 on them at one point, until going to a pair of 370/155's with
1mB each, WOW, a whole megabyte of storage! Running MVT BTW.
Much, much too long. It should have been killed of by say 1980 or so.

Re: Machine-Level Assembly Language

2008-09-02T19:40:52Z

I probably believe that DOS/360 was fine as a stepping stone
while small machines were affordable and large ones weren't.
I do believe DOS/360 and its descendants have survived
too long, though.
-- glen

Re: Machine-Level Assembly Language

2008-08-23T03:53:26Z

Historically, DOS/360 was first announced as "BOS/360 16K Disk", an
advanced form of "BOS/360 8K Disk" (later simplified to "BOS/360"). That
says it all, really. At the 1964-66 epoch, there were still plenty of
IBM customers who regarded operating systems, per se, as annoying wastes
of hardware, and the minimum of 32K required for OS/360 as positively

Re: Machine-Level Assembly Language

2008-08-20T20:34:49Z

DOS/360 didn't relocate while loading. IIRC you had to link the
program to the partition it was going to run in. I assume if you
chaged your partition layouts that you needed to re-link all of your
programs. Fortunately the bank I worked at switched to OS/360.
It always amazed me that anyone could have designed something as bad