Path: utzoo!attcan!uunet!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!sdd.hp.com!hp-pcd!hpcvra!everett
From: everett@hpcvra.CV.HP.COM (Everett Kaser)
Newsgroups: comp.os.msdos.programmer
Subject: Re: Writing DOS Memory to Disk
Message-ID: <31600003@hpcvra.CV.HP.COM>
Date: 17 Sep 90 15:37:19 GMT
References: <142@usissc.Dayton.NCR.COM>
Organization: Hewlett-Packard Co., Corvallis, OR, USA
Lines: 12

Something you should beware of with "memory swap-to-disk" programs is tsr's
and programs that deal with interrupts.  If the interrupt vector table isn't
modified to handle these interrupts, then when you swap code out to disk and
overlay it with something else, your system crashes.  If you do modify the
interrupt vector table, you may screw the pooch also, because some other
component (software or hardware) of the system may be depending upon that
interrupt service.  These memory swappers are kind of neat, but they're a real
dangerous kludge on top of a single tasking OS.

Everett Kaser                   Hewlett-Packard Company
...hplabs!hp-pcd!everett        work: (503) 750-3569   Corvallis, Oregon
everett%hpcvra@hplabs.hp.com    home: (503) 928-5259   Albany, Oregon