Category : Utilities for DOS and Windows Machines
Archive   : FILTER1.ZIP
Filename : FILTER.DOC

Output of file : FILTER.DOC contained in archive : FILTER1.ZIP
FILTER : Filter out certain Keyboard input

COPYRIGHT (c) Geoff Drayson Jan. 03, 1989
c/o The Science Lab BBS. (301) 444 0551

Released to the public domain.

FILTER1.ARC contains the following files :
(1) Filter.doc : This documentation file
(2) Filter.asm : Source Code
(3) : Program

Command Syntax : FILTER (No parameters)

Revision Level: FILTER1.ARC Rev 1.0 Jan 03, 1989


This is a simple resident program that disables :

(1) Ctrl-C
(2) Ctrl-Break
(3) Ctrl-Alt-Del (Reset)
(4) Shift-PrtSc (Print Screen)
(5) Ctrl-Alt-Grey + (Select High Clock Speed ?)
(6) Ctrl-Alt-Grey - (Select Low Clock Speed ?)

Once installed, this TSR program should prevent the above KEYSTROKES from
stopping (or being seen by) a running program.
The KEY comparison code between Labels CA_KEY & KILL can easily be modified
by deleting or adding additional key combinations.

No code is included in this TSR to disable/remove it once it is intalled.
This would defeat its design purpose.
However, if RESPRO (Public Domain TSR Manager) is loaded BEFORE FILTER,
then FILTER can be Disabled or Removed by RESPRO.
Note: FILTER does not "KILL" RESPRO's Hot key "ALT ~".
(It could be modified to if required !!!!)

This program is provided "AS IS" and the authors assume NO LIABILITY
for damages to appliances, pets or any other items from the use of
this program.

For DOS 2.0 +.


  3 Responses to “Category : Utilities for DOS and Windows Machines
Archive   : FILTER1.ZIP
Filename : FILTER.DOC

  1. Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!

  2. This is so awesome! 😀 I’d be cool if you could download an entire archive of this at once, though.

  3. But one thing that puzzles me is the “mtswslnkmcjklsdlsbdmMICROSOFT” string. There is an article about it here. It is definitely worth a read: