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1992-01-28
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NoFBoot
Copyright 1991 by Padgett
NoFBoot is a small (368 byte) TSR designed to prevent
inadvertant booting from a floppy disk. It will intercept warm boot
requests (Ctrl-Alt-Del) and check for a floppy in drive A before
continuing. If a floppy is found in drive A, the request will be
aborted with a warning message. With NoFBoot, a cold start (reset
button or cycle power) will be necessary to boot from a floppy.
SumFBoot is an alternative to NoFBoot that may also be used. It
allows a floppy boot when Ctrl-Alt-F is pressed. In this case if a
floppy is NOT present the boot will be aborted.
Use of either of these program is designed to give the user
control of the resetting of a PC and to protect against "accidents".
The programs will run under versions of MS-DOS from 2.10 to 5.00
and are designed to be transparent to the user unless a warm boot is
requested from a floppy. In that case a warning message will appear.
In most cases, denial of a warm boot should have no effect on a
running program.
It must be remembered that once the boot process starts, all
control is lost and NoFBoot cannot override a BIOS decision or áa ì
fast ádisk insertion/door closure. Itáwill protect against accidents,
not deliberate attempts.
Additionally, any program that issues a direct BIOS call to the
reboot function will bypass NoFBoot as will any subsequent TSR (e.g.
McAfee Associates VSHIELD) that trap the warm boot function.
If such other TSRs exist, for NoFBoot to be effective, it must
be loaded LAST.
These programs are presented as FREEWARE, e.g. there is no
charge for their use however a copyright to the original code is
retained by the author, no changes to the code are permitted without
permission, and distribution must include this document.
Disclaimer: These programs are presented AS IS and no guarantee
for fitness of any kind is made or implied. All use is at the sole
discretion of the user. I have tested these programs as extensively
as possible with limited resources but have not seen all possible
combinations of hardware and software. Caveat y'all.
Comments should be addressed to the author: A. Padgett Peterson
POB 1203
Internet: padgett%tccslr.dnet@mmc.com Windermere, Florida
USA 34786