jdc@naucse.UUCP (John Campbell) (01/05/89)
Help Mr. Wizard!
I'm playing with the DECDLD device control string to down-line load
characters on a vt240 (I also have access to a vt320, Tatung, and an
IBM 3151 that emulates a vt220). What I'd like to do is find a way to
do graphics using the sixel capability.
I can build sixels and display them on my LN03 using the "Select Sixel
Mode" introducer, and a variant of this technique was posted to comp.os.vms
a while back that runs on the vt240. Alas, this technique doesn't work
(as far as I can tell) on the vt320 or IBM 3151 in vt220 mode. I think
this means I have to do graphics for the generic vt220 down-line loading a
character at a time.
The main problem I came up against is trying to get the ``full-cell''
modifier to work. Each time I try to set the DRCS full cell parameter
on the VT240 it fails to load the character. Without the full-cell parameter
I end up with a column that I can't fill in for each character cell.
Does anyone know 1) anything about what I'm talking about; 2) how to get the
full-cell parameter to work; 3) how to go about solving the general problem
of graphics on the vt200/vt300 series and it's clones?
If there is enough interest I'll post a summary.
PS I'm aware that there is a company that makes a graphics package for the
vt220. What I'd really like to do is have GNUPlot work with vt220
type terminals (which means giving away the source code).
--
John Campbell ...!arizona!naucse!jdc
CAMPBELL@NAUVAX.bitnet
unix? Sure send me a dozen, all different colors.