25 May
2016
25 May
'16
1:01 p.m.
From: Jon Elson
the /20 was intended for very specific uses in 360
shops, and maybe as
an entry-level "foot in the door" to move totally tab card shops into
the 360 family. The only /20s I ever saw were used as offline spool
printers and card readers in large 360 shops.
I interned at IBM Bermuda, and they had a 360/20 as their main service bureau
machine; it had (IIRC) a card reader/punch, 4 tape drives, and a 4301
printer. When I got there, they had just gotten in a System 3 (two
single-platter hard drives, a 4301 printer, and I'm not sure what else) to
replace it.
Noel
25 May
25 May
1:06 p.m.
On 05/25/2016 12:01 PM, Noel Chiappa wrote:
I'm guessing, maybe, that would be a 1403 printer? There
were 1403 and 1443 printers.
The only language supported on the 360/20 was RPG. For a
mostly tab card type of operation, you could actually do a
lot in RPG. Otherwise, you had to write in machine language
and get it assembled on another system.
Jon
From: Jon
Elson
the /20 was intended for very specific uses in
360 shops, and maybe as
an entry-level "foot in the door" to move totally tab card shops into
the 360 family. The only /20s I ever saw were used as offline spool
printers and card readers in large 360 shops.
I interned at IBM Bermuda, and they had a 360/20 as their main service bureau
machine; it had (IIRC) a card reader/punch, 4 tape drives, and a 4301
printer. When I got there, they had just gotten in a System 3 (two
single-platter hard drives, a 4301 printer, and I'm not sure what else) to
replace it.
1:11 p.m.
On 05/25/2016 10:06 AM, Jon Elson wrote:
The only language supported on the 360/20 was RPG.
For a mostly tab
card type of operation, you could actually do a lot in RPG.
Otherwise, you had to write in machine language and get it assembled
on another system.
My recollection was that there was a native assembler for the 20; it did
not, IIRC, include such goodies as macros, but was sufficient to write
small programs.
--Chuck
1:39 p.m.
On 05/25/2016 12:11 PM, Chuck Guzis wrote:
On 05/25/2016 10:06 AM, Jon Elson wrote:
OK, makes sense, but I didn't find any doc about it when I
did some searching a while ago.
Jon
The only language supported on the 360/20 was
RPG. For a mostly tab
card type of operation, you could actually do a lot in RPG.
Otherwise, you had to write in machine language and get it assembled
on another system.
My recollection was that there was a native assembler for the
20; it did
not, IIRC, include such goodies as macros, but was sufficient to write
small programs.
3:51 p.m.
I have a related question. All of the S/260s that I've seen had 2400
series tape drives. But my "green card" makes reference to 729 drives
as well. Does anyone recall them being installed on a S/360 system?
--Chuck
4:17 p.m.
On 5/25/2016 12:51 PM, Chuck Guzis wrote:
I have a related question. All of the S/260s that
I've seen had 2400
series tape drives. But my "green card" makes reference to 729 drives
as well. Does anyone recall them being installed on a S/360 system?
--Chuck
Our 360/50 had 2400 drives. Read both 7 and 9 track on one. I think
the subsystem was structured similar to the 3400 which had a controller
box that powered and ran the drives. I'm not sure what the 2400 system
number was, but the 3400 series was a 3803, I think with the power
supply and channel, etc.
thanks
Jim
9:09 p.m.
On 05/25/2016 02:51 PM, Chuck Guzis wrote:
I have a related question. All of the S/260s that
I've seen had 2400
series tape drives. But my "green card" makes reference to 729 drives
as well. Does anyone recall them being installed on a S/360 system?
--Chuck
Well, the early 2400 tape drives had a VERY simple
interface. The read amps delivered raw analog signals to
the controller. The write amps took 9 digital signals from
the controller. There were also forward, reverse, rewind,
write gate and EOT/BOT sensors, and unit select. VERY
simple interface at the VERY lowest possible level.
I can easily imagine the 729 series of drives may have had a
very similar interface. So, it may be possible that these
could be interchanged fairly easily.
Jon
1:13 p.m.
The only language supported on the 360/20 was RPG. For a mostly tab card
type of operation, you could actually do a lot in RPG. Otherwise, you had
to write in machine language and get it assembled on another system.
I never used a /20, but I did a lot RPG/II on a model /40. It is in fact one
of my favourites...
(I can hear people laughing!). For a customer, I wrote a RPG interpretor, so
he could use the in-house RPG expertise to set up validation routines for
the data coming into the shop. The interpretor was written in Turbo Pascal
for Windows 1.50. The output was a DLL, which was then used in a nice media
conversion program (InterMedia)
/Nico
--
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SPAMfighter has removed 4534 of my spam emails to date.
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1:19 p.m.
On 2016-05-25 2:06 PM, Jon Elson wrote:
On 05/25/2016 12:01 PM, Noel Chiappa wrote:
I'm guessing, maybe, that would be a 1403 printer? There were 1403
and 1443 printers.
The only language supported on the 360/20 was RPG. For a mostly tab
card type of operation, you could actually do a lot in RPG. Otherwise,
you had to write in machine language and get it assembled on another
system.
Jon
RPG was also a very popular language on S/3, S/32, S/34, S/36, S/38 and
AS/400 however as time went by it changed a lot and I am told the RPG on
the AS/400 bears little resemblance to the original. The closest I even
got to RPG was when writing code for S/36 we needed a test file and
looked at DFU as a means of creating one, we scrapped that idea when we
found we needed to use RPG specs to describe the file, and modified a
COBOL program one of my coworkers had to create the file.
Paul.
From: Jon
Elson
the /20 was intended for very specific uses in
360 shops, and
maybe as
an entry-level "foot in the door" to
move totally tab card
shops into
the 360 family. The only /20s I ever saw were
used as offline
spool
printers and card readers in large 360 shops.
I interned at IBM Bermuda, and they had a 360/20 as their main
service bureau
machine; it had (IIRC) a card reader/punch, 4 tape drives, and a 4301
printer. When I got there, they had just gotten in a System 3 (two
single-platter hard drives, a 4301 printer, and I'm not sure what
else) to
replace it.
1:48 p.m.
I'm guessing, maybe, that would be a 1403 printer?
There were 1403 and 1443
printers.
There was also a 1404 printer, but I do not think many places had them.
Does anyone know what became of the two S/360 model 20 systems that
came out of Sweden a year or two ago? They were fairly complete with
MFCMs and tape units. My bid for one did not get accepted, and I do
not know who the winner(s) were.
--
Will
6:34 p.m.
On Thu, May 26, 2016 at 5:48 AM, William Donzelli <wdonzelli at gmail.com> wrote:
Well I know LCM has at least one working... and if there was any
bidding involved they would have won by definition! But I don't know
if that's where they got it or not.
I hadn't heard about these machines; I would have been interested of course.
http://www.corestore.org
'No greater love hath a man than he lay down his life for his brother.
Not for millions, not for glory, not for fame.
For one person, in the dark, where no one will ever know or see.'
I'm
guessing, maybe, that would be a 1403 printer? There were 1403 and 1443
printers.
There was also a 1404 printer, but I do not think many places had them.
Does anyone know what became of the two S/360 model 20 systems that
came out of Sweden a year or two ago? They were fairly complete with
MFCMs and tape units. My bid for one did not get accepted, and I do
not know who the winner(s) were.
3013
days inactive
3014
days old
10 comments
8 participants
participants (8)
-
cclist＠sydex.com -
elson＠pico-systems.com -
jnc＠mercury.lcs.mit.edu -
jws＠jwsss.com -
nico＠farumdata.dk -
phb.hfx＠gmail.com -
tmfdmike＠gmail.com -
wdonzelli＠gmail.com