Date:	Mon, 10 Feb 1997 19:23:21 -0600 (CST)
From:	"Colin W. Glenn" <cwg01 AT gnofn DOT org>
To:	"'OpenDOS newsgroup'" <opendos AT mail DOT tacoma DOT net>
Subject:	Re: [opendos] 7k mouse driver
In-Reply-To:	<Pine.LNX.3.95.970210085234.285p-100000@capslock.com>
Message-ID:	<Pine.GSO.3.95.970210191611.19524C-100000@sparkie.gnofn.org>
MIME-Version:	1.0
Sender:	owner-opendos AT mail DOT tacoma DOT net

On Mon, 10 Feb 1997 mharris AT blackwidow DOT saultc DOT on DOT ca wrote:
> On Fri, 7 Feb 1997, Colin W. Glenn wrote:
<SWISH!>
> > IF the driver is compiled by a Good Compiler, it leaves a tiny footprint.
> IF the driver is written in 100% ASM by a good programmer, it
> leaves a smaller footprint.

You are, of course, right, namely because the first language I learned is
assembly, and golden rule one is, write as little as possible to get the
job done without sacrificing safety.

As an example, I got interested in a program's disk usage and wrote a TSR
which would trap INT21's and see if it was a disk access.  If yes, it
dumped the registar contents and return address to the printer, else it
jumped to the original entry point for INT21.  I stacked three registars
if the result was yes and worked with AX, DX, & BP.

> > > Hope that's useful, and hope there isn't a huge mouse driver thread coming..
> > Eeek!  There's a mouse in my filesystems thread!
> Yip, definately.  I can see it coming.  Thats ok, I'm prepared...
> :o)
Mousetrap.

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