Ricardo:
It has been a long time since I looked at this, but I expect there is some 3270 function that could be used to retrieve the character set(s). However, the
3270 Data Stream Programmer's Reference is only in IBM .boo format (last edition pre-dates PDFs!). You will need to download the
IBM Softcopy Reader application for Windows to look at this.
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Jim Elliott
Senior IT Consultant
GlassHouse Systems Inc.
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Original Message:
Sent: Wed December 02, 2020 11:54 AM
From: Ricardo Bánffy
Subject: Mystery characters on a 3278-2
Thanks, James.
Indeed, it's a dotted overline. Has anyone ever dumped the chargen ROM
of an actual 3278-2?
I suppose IBM has, somewhere, the original design documents.
--
Ricardo Bánffy
http://about.me/rbanffy
Original Message:
Sent: 12/1/2020 9:07:00 AM
From: James Elliott
Subject: RE: Mystery characters on a 3278-2
I looked at the 3270 Character Set Reference and I can't see anything like this. That is not an overscore, but 4 dots. Note that there were a lot of character sets (fonts) for the 3270 family for languages (and special apps like APL). In addition to all the hardware character sets, there were also loadable character sets, but I don't think that is the case here.
http://www.bitsavers.org/pdf/ibm/3270/GA27-2837-9_3270_Character_Set_Reference_Apr87.pdf
Jim Elliott | Senior IT Consultant
GlassHouse Systems Inc.
Original Message:
Sent: 11/30/2020 4:24:00 PM
From: Ricardo Bánffy
Subject: Mystery characters on a 3278-2
Hi folks.
I hope someone here is old enough to remember these and, maybe, help us.
We found a couple characters on a 3278-2 photo we can't identify. They
are not in the x3270 font, which I assumed would be a faithful and
complete copy - they are short numbers with dotted overlines.
Does that ring a bell?
More info here: https://github.com/rbanffy/3270font/issues/77
--
Ricardo Bánffy
http://about.me/rbanffy