[comp.os.vms] SET HOST type-ahead problem

KVC@ENGVAX.SCG.HAC.COM (Kevin Carosso) (08/11/87)

> I have observed strange behavior with type-ahead when doing single
> character terminal input via SET HOST.

> (B) I have noticed a similar behavior in GnuEmacs via SET HOST.  If you
> type ahead to it, while it is redrawing the whole screen, it displays lines
> alternately in the top and bottom halves of the screen.  The final display
> is correct, presumably because each line begins with a cursor positioning
> command.  I used to think this was some quirk of Emacs.  Now it looks like
> it's some DEC problem.

Sure sounds like a SET HOST bug to me.  I believe SET HOST packages up the
terminal I/O request on the remote system and ships over to the local RTPAD,
where the appropriate local QIO is performed by RTPAD.  There may be room
for a bug or two in all that.  Has anyone tried the simplest case?  Something
like PTY.PAS which generates it's own output lines to get rid of extra
variables like the PTY driver?

Another thing that's been reported to me is that PTY.PAS does not work inside
a VT220 window on a VAXstation, although it does work if you log into the
VAXstation with a direct or LAT terminal.  Do single-char reads not work
in a WTA device?  Does Asbed's PHOTO work in that situation?

        /Kevin Carosso                     kvc@engvax.scg.hac.com
         Hughes Aircraft Co.               kvc%engvax@oberon.usc.edu