[comp.sys.amiga] VLT 4.036 bug

chas@gtss.gatech.edu (Charles Cleveland) (07/02/89)

I am reporting this directly to Willy but since I announced that I was
making the new release of VLT (4.036) available by anonymous ftp from
this site and since many of the readers of this group who use VLT will be
using it on UNIX machines, I wanted to issue this warning.  I will not send
this version of VLT along to comp.binaries.amiga.  I will wait for a
fix.  In the meantime it is still available here by anonymous ftp.

I am now back to VLT 3.656.  The problem is that in vi on my Sun (whose
termcap description of a vanilla vt100 is probably pretty standard) if
while in command mode I type

o

for "insert a blank line after this one and go to the start of it in
insert mode" the rest of the page gets badly screwed up.  Like we're
talking major unreadability here.  Some lines get split apart by blank
rows of pixels and others (I think) may get overwritten by other lines or
parts of other lines.  This happens regardless of whether I'm in interlace
(and therefore using the 11 point version of topaz, since VLT seeks out 11
point fonts when in interlace) or when non-interlaced (and using an 8 point
topaz font).

For the technically oriented among you the control string the Sun sends
is -- presuming for specificity that I am on line 2 (the control string
contains no actual spaces or newlines)

ESC 7 ESC [ 3 ; 2 4 r ESC 8 ESC M NUL NUL NUL NUL NUL ESC [ 1 ; 2 4 r
ESC 8 ESC [ 2 4 ' 1 H NUL NUL NUL NUL NUL ESC [ K NUL NUL NUL ESC [ H

If you are using VLT 4.036 and not experiencing these problems when performing
a similar operation please let me know what control sequence is being sent
(if you can capture it -- I got the above one from VLT 4.036 using the
capture session [ascii capture] function).  This may help Willy track down
the trouble.

I may have also observed other anomalies, but I'm not sure.  Of this one
there was not doubt.

--
"Our vision is to speed up time, eventually eliminating it." -- Alex Schure

Charles Cleveland   Georgia Tech School of Physics   Atlanta, GA 30332-0430
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