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EGADUMP.DOC
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1989-07-09
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Documentation for EGADUMP.COM
Copyright 1989 Infinity Design Concepts Inc. All Rights Reserved
1052 Parkway Drive
Louisville, Kentucky 40217
(502) 636-1234
This program is a TSR (memory resident) utility that adds
more capabilities to the DOS print screen functions. DOS
by itself, will handle the text modes, but if the CGA graphics
modes need to be dumped to the printer, then GRAPHICS.COM
must be loaded. There is a severe limitation to GRAPHICS.COM's
capabilites and that is, that it will not work on EGA graphics
modes, that is the following modes;
320x200 - 16 color (mode d)
640x200 - 16 color (mode e)
640x350 monochrome (mode f)
640x350 - 16 color (mode 10)
EGADUMP should be loaded AFTER graphics.com, since graphics.com
will try to handle these modes if it gets control before
EGADUMP. In order to be able to dump all screen modes to the
printer, GRAPHICS.COM (or CGRAPHIC.COM) must be loaded
in addition to EGADUMP.
EGADUMP is set up to work with the IBM graphics printer, which
means that if you have a printer that has an EPSON or IBM mode,
EGADUMP will work with it. If your print screen works now in
graphics mode, then it will work with EGADUMP.
There are two printer strings used in EGADUMP;
ESC,"L",n - set up for double density graphics
ESC,"3",n - set to n/216" linefeeds
Command line switches:
The /I switch given when EGADUMP is loaded
will cause black to be printed as black and white
to be printed as white. The default for EGADUMP
and GRAPHICS.COM is to reverse black and white
when printing. The switch can be invoked as follows;
EGADUMP /I
The /F switch given when EGADUMP is loaded will
cause a formfeed to be sent to the printer. The
switch can be invoked as follows;
EGADUMP /F
The switches /I or /F may be used in tandom and
may be invoked as follows;
EGADUMP /I /F
Technical:
EGADUMP inserts itself into the Interrupt 5 (print screen)
chain. When the print screen key is depressed,
EGADUMP will get control (if it is loaded last) and
determine which video mode is active. If it is
one of the modes listed above, then EGADUMP will
handle sending the screen to the printer. If it is not
one of the above modes, then EGADUMP passes control
back to the routine that would have been called, had
EGADUMP not been loaded.