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- 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.
-