In addition to all of the other translations that may be invoked, a 3270 with 
text or APL has two built-in code pages and uses the GE character to select the 
alternate page. ISPF has to deal with that if you select the appropriate 
terminal type.

________________________________________
From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> on behalf of 
Grant Taylor <0000023065957af1-dmarc-requ...@listserv.ua.edu>
Sent: Tuesday, October 10, 2023 10:22 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: TN3270, EBCDIC and ASCII

On 10/10/23 3:15 PM, Rick Troth wrote:
> The copy-n-paste point makes me wonder if the fonts are actually mapped
> to ASCII values.

I was wondering the same thing.

I'm watching the thread to learn more.

> I don't know graphical environments well enough to analyze it. But it
> would mean that, yes, there *is* A/E translation happening even in the
> graphical 3270 emulators. (In hopes of not steering Juan wrong with what
> I said before.)

I would have naively assumed that the A/E translation is happening
between the TN3270* protocol and the in memory screen buffer.

This would mean that the buffer can be displayed with any font the user
chooses /and/ it would more cleanly support copy / paste.

*I actually assume that similar would happen with communications using
more traditional SNA on the LAN; e.g. DLC.  --  If memory even remotely
serves after a long day.



--
Grant. . . .
unix || die

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