Date: Fri, 21 Nov 1997 14:37:48 +1300 From: physmsa AT cantua DOT canterbury DOT ac DOT nz (Mr M S Aitchison) Subject: Re: rodent problems To: opendos AT delorie DOT com Message-id: <199711210137.OAA11710@cantua.canterbury.ac.nz> Precedence: bulk Long before OpenDOS came, I have discovered that *sometimes* loading a mouse driver high causes all manner of problems. I suspect that is what is happenning here (since usig HIMEM instead of EMM386 fixes it). Symptoms I have found include system hangs, memory control block messed, mouse not working except under Windows (since it has its own driver) and interference with networking. I have never found why, exactly. And I don't know which combination of O/S, mouse driver and other software causes, but you can sometimes make a minor change in the order things are loaded and it can work. It is probably a situation where the mouse driver can write over memory outside its area, and it is a matter of where things are loaded that determines whether this matters a lot or not. I find it is a good idea when anything happens involving the mouse, or that indicates any instability, to start by not loading the driver high, and see if that fixes it. If so try a few alternative mouse drivers and check you aren't using any upper memory regions you shouldn't. ------------------------------------------------------------------------- Mark Aitchison, \_ Phone: +64 3 364-2947 home 337-1225 Dept of Physics & Astronomy,