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1993-10-10
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NoFBoot
SumFBoot
Copyright 1991,1993 by Padgett
NoFBoot is a small (256 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 6.x
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
fast disk insertion/door closure. It will protect against accidents.
Further, if any program is loaded AFTER NoFBoot that also can
generate a reboot (such as McAfee's VShield) control is lost. NoFBoot
(or SumFBoot) should always be loaded LAST.
Either of these programs may be loaded "high" by either QEMM
"Loadhi", Dos 5.0 or 6.x "Loadhigh". Other memory managers should
also permit loading "high" but have not been tested.
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. Any distribution must include this file.
WeaselWords: This software is presented without guarentee of any kind.
All use is at the sole discretion of the user.
The author assumes no liability of any kind for anything
Comments should be addressed to the author: A. Padgett Peterson
Telephone: (407)352-6007 POB 1203
Internet: padgett@tccslr.dnet.mmc.com Windermere, Florida
USA 34786
Revision History
v 2.2 August, 1993 - reduce TSR size to 256 bytes
- remove conflict with BIOSes before 11/85
v 1.03 1991 - original release