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CD ROM Paradise Collection 4 1995 Nov.iso
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00READ.ME
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Text File
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1988-02-06
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3KB
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70 lines
This file describes the programs EMULATT and EMATTSET. These programs
were written by
Kevin Lowey
Department of Computing Services
University of Saskatchewan
Saskatoon, Saskatchewan Canada
LOWEY@SASK.BITNET
...!ihnp4!sask!lowey.uucp
(306) 966-4826.
The program is distributed as is, without any warranties. The University
of Saskatchewan takes no responsibility for the actions of this program.
USE AT YOUR OWN RISK. The program copywrite is owned by the University of
Saskatchewan, but the program may be freely distributed, as long as the code
is not modified, and the University of Saskatchewan is acknowledged as the
original source of the program.
The programs are both written in Turbo Pascal version 4.0.
EMULATT:
~~~~~~~
This program makes your DEC VAXmate 640x400x2 colour graphics resolution
look like the AT&T 6300 (olivetti) 640x400x2 colour graphics mode. This
allows many programs which do not support the VAXmate, but do support the
AT&T 6300 computer, to utilize the VAXmate hires mode.
To use the program, type EMULATT. The program will then install its self.
The EMULATT program works by intercepting interrupt 10h. Whenever the
application asks to go into the AT&T hires mode (mode 40h) this program
substitutes the VAXmate hires mode number (D0h). All other aspects of the
graphics system remain the same.
LIMITATIONS:
~~~~~~~~~~~
This program will not work with programs which automatically detect the
AT&T computer is present by looking at the ROM BIOS copyright message or
some other method. The program will only work with programs which allow
the user to specify the device driver the program should use.
The program has been tested with Turbo Pascal's Borland Graphics
Interface (.BGI) driver for the AT&T computer.
EMATTSET:
~~~~~~~~
There are two interrupt 10h functions which use the computer mode. One
puts the computer into the graphics mode. This is the one EMULATT changes.
The other reports what graphics mode we are currently in. EMULATT normally
reports that it is in the DEC graphics mode (D0h). This was done for
compatibility with VAXmate graphics programs, such as GRAPHICS.COM. However,
some applications may require that the AT&T mode number is returned (40h).
EMATTSET is used to toggle which mode is reported.
"EMATTSET" by its self displays a help screen and tells what mode is
currently being reported.
"EMATTSET +" makes EMULATT report that it is using an AT&T
graphics card for compatibility with AT&T software.
"EMATTSET -" makes EMULATT report that it is using a VAXmate
graphics card for compatibility with DEC software.