Anyone know about NRCS on DEC terminals?

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1 total messages Started by Jim Becker Mon, 23 Nov 1992 21:43

#1309

Author: Jim Becker
Date: Mon, 23 Nov 1992 21:43

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I'm  trying  to  tie-down the final logic in a VT320 terminal emulator
I've written, and am getting conflicting notions of how  the  National
Replacement Character Sets are used.. Anyone own up  to  understanding
this?  :)

The  basic understanding problem i have is how the "hardware" keyboard
type and the selection of "software" Character Sets in G0-G3 interact.

From what i understand,  the  input  side  of  translation  always  is
hardwired to the current hardware keyboard type, setup in the NVRAM of
the DEC terminal. So there is always the  twelve  character  remapping
"statically" done  on  the  input  side,  independent  of  application
software.

Assuming  this  is  true,  the question is the effect of Character Set
selection for G0 thru G3 on the output side, and how this affects what
appears  on the screen. And what is the default output when going into
NRCS mode (<ESC>?42h) with all this..

Anyone  out there understand all this? If so please send some email to
enlighten me, thanks a lot!

-jim

--

 -Jim Becker / jcb@pcx.ncd.com / Network Computing Devices, Inc. (NCD)
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