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Mystery characters on a 3278-2

  • 1.  Mystery characters on a 3278-2

    Posted Mon November 30, 2020 04:24 PM
    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


  • 2.  RE: Mystery characters on a 3278-2

    Posted Tue December 01, 2020 09:07 AM

    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.

     






  • 3.  RE: Mystery characters on a 3278-2

    Posted Wed December 02, 2020 11:55 AM
    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




  • 4.  RE: Mystery characters on a 3278-2

    Posted Wed December 02, 2020 12:17 PM
    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.

    ------------------------------
    Jim Elliott
    Senior IT Consultant
    GlassHouse Systems Inc.
    ------------------------------



  • 5.  RE: Mystery characters on a 3278-2

    Posted Wed December 02, 2020 07:11 PM

    That's cool. There is an Arduino-based interface for the coax connection. Now all that's needed is an actual 3278-2.

    Oh boy...



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    Ricardo Bánffy
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