Kryptic Virus Killer and System Checker and Util

Made  in  June 10th 1991 by ROMBUST.  (Last Update in 16th August 1991) This
program  is  in  public domain - use this program at your risk.  I accept NO
Responibility  for  damage  used  directly  and  indirectly by this program.
Don't  worry though - I had to say that for my safety!!  This program allows
the user to display some important vectors and Vectors where memory resident
Viri  may  lurk  - and kill it.  And this prog can check the memory for hard
errors  (eg  it can write to chip memory from 0 to ?????  - But not damaging
original  RAM  data  - and a warning comes up if there is an error.) Finally
this program can do the ADD21K command as normal.  Which Removes a bit plane
from the screen - saving 21K.  Also it can remove both the bit planes saving
42K!   -  But  the  computer must not display anything onto the main screen.
When the ADD42K Function is running the screen may currupt.  this is because
other  programs think that the screen is free memory, and pours its own data
onto it.


V1.2 Update:
Now this program tests the Disk-Validator with a modulo checksum- method, so
if  there  is  an error - the program informs you, and asks you to check the
disk  with LSD's NUKE Virus Killer.  Because Nuke detects the Disk-Validator
virus - and kills it.

The  Interrupt Vectors are checked - as some viri hide inside them.  All the
Resident Modules are checked to find anything not in ROM.

The  Startup-Sequence is now checked to find if a virus has encrypted itself
into  it (ASCII Code <32 or >126 is checked).  It only tests for the first 4
characters.  Also the prog displays how to kill it.  -For my Tel number, see
one of my demos -


V2.0 Update:
This  Program  Now Includes a *PAL* Program, to extend the CLI Window to the
full size.

V2.1 Update:
This Program Now Includes a *Border* Program, to delete the CLI Border - the
pal  program  also  has to be used with this.  A Bug - A White bar appear at
the top of the screen

V2.14 Update:
The  Bug  in  V2.1  Has  been fixed, using the CSI (Command Line Introducer)
Which  Is  built  into the amiga CON:  or RAW:  Device.  I used it to change
the  text start position (0,0).  Only one problem though - It will only work
on PAL machines on Hi-res, no Interlace.

V2.15 Update:
A  bug  which  messed  up exec's TDNestCnt, caused by too many Exec's Forbid
functions  to  Permit  Functions, which led to problems when another program
uses the Permit Function, has been removed.

V2.16 Update:
The  bug  in  V2.14  has  been removed:  This program can handle- Any Screen
Width, Height (inc.  pal/ntsc, interlace) and 60 col or 80 col text


Type:


KILLSYS xxxxxx to run program, where x is:

V : Vector check ON (Highlighted if error)
B : Wait for left mouse button, before using utils ON
C : Choice to HARD reset if anything is wrong with vectors ON
M : Check Chip and Fast mem (If present) for errors ON
P : Kill Bit plane 2 (ADD21K) ON
Y : Kill Bit plane 1 (ADD42K) - P also has to be true! ON
F : Check DiskVal and Startup-Sequence ON
L : Extend screen To Full Length ON
W : Turn CLI Border Off - L also has to be true! ON

eg.
    Killsys VFMP  =  Test Vectors, Test Files, Memory, Kill BP2
    Killsys      =  Display help (How else are you reading this?)