GRAPHICS TERMINAL EMULATION

In earlier releases, MS-DOS Kermit responded to ESC 1 and ESC 2 for
automatically switching into and out of Tektronix graphics mode, for the
benefit of some long-forgotten host-based graphics software.  This feature
has been discontinued because these escape sequences mean something entirely
different, namely "switch character size" in VT340 Tek mode.

PS/2 Model 25 and 30 MCGA adapter is used in low-resolution CGA mode by
default; images may be elongated or truncated.	Hi-resolution graphics can be
done (as of version 3.11) via SET TERM GRAPHICS VGA, but the PC might not be
able to keep up at speeds above 9600 bps.

When you type the escape character (normally Ctrl-]) while in Tektronix
graphics mode, the screen goes back to text memory.  Then when you type the
argument character, the graphics screen reappears (unless the argument was C or
P).  Ctrl-]F will not file the graphics screen, but rather the text screen,
because that's the screen that's showing after type the Ctrl-] key.  To file
the graphics screen (in TIFF format), use \Kdump (normally on Ctrl-Keypad-End).

You can't dump the Tektronix screen while the GIN-mode crosshair cursor is
active; Kermit's keyboard translator is not active.  Key strokes (of regular
typewriter keys) or mouse actions are used to transmit the crosshair
coordinates.  If you press a non-typewriter key, Kermit just beeps.

Kermit does not emulate a particular kind of color graphics terminal, such as a
DEC ReGIS display or a Tektronix 41xx or 42xx series.  However, it can be used
for color graphics by mixing ANSI color-setting escape sequences with Tektronix
or Sixel commands.  This requires graphics software vendors adding support for
MS-DOS Kermit graphics to their packages (so far, WordPerfect Corp has done
this for their host-resident products).  There is at least one ReGis-to-Sixel
converter on the market: RETOS, a DEC product for VAX/VMS.

Problems may occur when using Kermit with host-resident (VAX/VMS) versions of
WordPerfect because the color palette report sent upon request of WordPerfect
is very long. If the host is not configured properly, parts of the report will
be lost because of overruns on the VMS side.  SET TERM /HOSTSYNC and /TTSYNC
are required for WP/VMS.  Even then intervening communication boxes (e.g.
terminal servers) can become overloaded with the 200++ byte response.

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