I ran into that type of debugging on a shared IBM 3278 with that switch
set to show all caps. It probably took me 15 minutes to figure out why
JES2 was telling me "DSN=" was invalid in the JCL I just modified. It
looked fine on the screen, and of course I was 100% convinced JES2 was
broken.
On 11/19/2018 2:57 PM, Jesse 1 Robinson wrote:
In my first IT job, we had Raytheon clones there were serviceable enough but
had a curious quirk. There was a rocker switch that flipped the entire display
into upper case. Not the actual data, just the display. Made for some
interesting debugging. Still don't understand the intention.
.
.
J.O.Skip Robinson
Southern California Edison Company
Electric Dragon Team Paddler
SHARE MVS Program Co-Manager
323-715-0595 Mobile
626-543-6132 Office ⇐=== NEW
[email protected]
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf
Of Pew, Curtis G
Sent: Monday, November 19, 2018 2:39 PM
To: [email protected]
Subject: (External):Re: So much for THAT excuse | Computerworld SHARK TANK
On Nov 19, 2018, at 4:26 PM, Steve Thompson <[email protected]> wrote:
S/360 machines I worked on had a switch in the PSW to set them in ASCII mode. I
don’t remember or know of any software that made use of this. So that bit was
eventually required to be ON to force DAT or XA. I have forgotten what that bit
was “stolen” for now.
Right. The expectation was that routines would check the bit and generate
output in the appropriate codeset, and eventually everyone would be using
ASCII. Instead, everyone ignored the bit and generated EBCDIC, so the bit was
reused for something else (I can’t remember what either.)
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