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From: nyet@nntp-server.caltech.edu (n liu)
Newsgroups: comp.windows.ms
Subject: Dumn Question: what is ega.sys?
Message-ID: <1991Jun4.210335.20502@nntp-server.caltech.edu>
Date: 4 Jun 91 21:03:35 GMT
Organization: California Institute of Technology, Pasadena
Lines: 38

I've got a Trident 8900 card and the new hirez 256 color beta drivers.
During installation, setup insists that i need to load ega.sys.

I've experimented a little between loading it and not loading it, but
haven't seen much difference.

The startup screen looks like this:

EGA Device Driver Version 2.10.18
[copyright stuff]

Using default value of BCH for interrupt 2FH function calls.
Warning!! Overwriting an old copy of the EGA Device Driver.
A copy of the EGA Device Driver is being installed.

My interrupt list says:

----------2FBC00-----------------------------
INT 2F - Multiplex - Windows 3.0 EGA.SYS - INSTALLATION CHECK
        AX = BC00h
Return: AL = 00h not installed, OK to install
           = 01h not installed, not OK to install
           = FFh installed
                BX = 5456h ("TV")
Note:   AH=BCh is the default value, which may be changed by a command line
          parameter
----------2FBC06-----------------------------
INT 2F - Multiplex - MS Windows 3.0 EGA.SYS - ???
        AX = BC06h
Return: CX = 020Ah
        DL = 12h

So, what the hell does it do?

Incidentally, the "Warning!!" message goes away if i take out my Logitech
mouse.sys ver 5.0.

nye