Re: VPLUS and dynamically displaying graphics characters

It is not really graphics, just alternate character. The shiftin/shiftout
shifts back and forth between them. The control characters would be part of
the screen image in the forms file.

Bob Comeau
Sr. Systems Programmer Analyst
Crossley Carpet Mills Ltd.
(902)895-5491 ex 139


-----Original Message-----
From: HP-3000 Systems Discussion [mailto:HP3000-L@xxxxxxxxxxxxx]On
Behalf Of Peter Smithson
Sent: August 11, 2005 10:39 AM
To: HP3000-L@xxxxxxxxxxxxx
Subject: Re: VPLUS and dynamically displaying graphics characters


>VPLUS doesn't know from the data stream. But if it is outputting
>characters to the right of a Ctrl-N, they will show up as the Line
>Drawing character set, and if to the right of a Ctrl-O, as normal
>characters.
>
>If you have a vertical graphical character just before the box
>characters, this implies a prior Ctrl-N.
>
>So it might be the emulator not emulating properly. Or it might be
>wondering quite why you want LD in a box on a form... :-)

That must be it. I'm not that familiar with using graphics with formspec on
MPE but I guess you do a ctro-O and that applies to everything to the right
of that. You don't have to do it for every character from what you're
saying.

There's no control codes or escape sequences in the COBOL program. I
couldn't understand how VPLUS knows to use graphics characters but I have a
feeling that even when you're in a graphics character set, upper case
letters appear normally anyway. So that whole area of screen is probably in
a graphics mode but that's OK as they display text in upper case.

None of this fits in well with the emulator since it knows how each
character is displayed in the formspec file from an XML file created from
it. There's no concept of graphics areas.

Thanks for the help everyone - at least I understand the problem now.

Peter

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