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!VKiller/!Help

This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.

Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.

Tape/disk: Home » Archimedes archive » Micro User » MU 1991-05.adf
Filename: !VKiller/!Help
Read OK: ✔
File size: 3175 bytes
Load address: FFFFFF43
Exec address: 6D40854A
Duplicates

There are 3 duplicate copies of this file in the archive:

File contents
All code and documentation is exclusively (C) Richard K. Lloyd 1990.
It is freely distributable.

Documentation for VKiller 1.10 - The Extend Virus killer/innoculator
--------------------------------------------------------------------

Introduction
------------

This is a virus warning to all Archimedes owners, especially those who favour
using the Desktop to run programs.

A virus has been written by an anonymous author to infect the !Boot file of
any application run by double-clicking on the application directory inside
the Desktop. It also claims, and never releases, 1K of RMA every time any
file or directory is double-clicked on. Hence, the system will eventually
crash with an RMA shortage.

Extend Virus technical information
----------------------------------

It's a module which can go under 8 different filenames (the name is picked at
random using the current time as a seed):

MonitorRM, CheckMod, ExtendRM, OSextend, ColourRM, Fastmod, CodeRM or MemRM.

However, the module itself has the following title string:

Extend 1.56 (08 Jul 1989)

and is always known as "Extend" in the module list. For reference purposes,
I shall refer to it as the "Extend Virus".

The date seems to imply that it has been around for some 16 months, which is
a worrying thought indeed. It is 940 (&3AC) bytes long and initialises itself
as a nameless Wimp task which then looks for Wimp Message 5 (double-click).
It attempts to either create a !Boot in the application directory or append
to an already existing one with the following lines:

IconSprites <Obey$Dir>.!Sprites<&0D>
RMEnsure Extend 0 RMRun <Obey$Dir>.ModName<&0D>
||<&FF>

The "IconSprites" line is omitted if it is appended to an existing !Boot.
"ModName" is one of the 8 possible filenames. The Extend Virus uses the <&FF>
(i.e. decimal 255) byte at the end as a self-check to see if has infected the
!Boot file already. Of course, it copies itself to the new name inside
the application directory as you would expect. Note the incorrect use of
<&0D> (decimal 13) to terminate the lines, rather than the more correct
<&0A> (decimal 10).

A shift-double-click does NOT cause an infection, but it DOES claim yet
another 1K of never-to-be-released RMA.

I have gone through the entire code and the only destructive thing it does,
apart from wasting disk space with copies of itself, is to claim the 1K of
RMA for every double-clicked file or directory (eventually crashing the
system).

Extend Virus Execution Count
----------------------------

There was one bit of the Extend Virus module code that perplexed me - why
would someone increment a memory location within the module and never use it?
At first I skipped this code, but, remembering some viruses on the Amiga, I
suddenly realised that the incremented value would be copied whenever the
module duplicated itself during a new infection. Now if the original author
was smart, he would have incremented the counter IF AND ONLY IF there was
a completely successful new infection (in fact, he would have incremented it
prior to the new infection and decremented it if the infection failed).
However, the Extend Virus module actually increments the counter whenever it
is first started (usually via the *RMEnsure appended to the !Boot)...thus the
counter does not correlate to the number of infections so far. Because of
this I've decided to call it the "Execution Count" from now on.

Deliberately faulty virus coding ?
----------------------------------

When the Extend Virus initialises itself as a nameless task, it does not save
its task handle. Hence, when it comes to execute Wimp_CloseDown (only via a
*RMKill - it cannot be killed by the Task Manager) it does NOT supply a valid
task handle. Thus, opening up the Task Manager afterwards causes it to
fatally crash...which isn't nice. I have managed to solve this problem 50%
of the time, but the other half is down to Acorn's omission of a way of
getting a task handle when supplied with a task name (null string in this
case).

The upshot of all this is that if VKiller is run BEFORE the Extend Virus is,
then VKiller will patch the active virus in RMA so that it shuts down with a
proper task handle and the Task Manager can still be safely used. However,
should the Extend Virus already be present when VKiller is run, then the
Task Manager will fatally crash the Desktop if it is opened (or is already
open when VKiller is run).

The solutions to all this are simple:

1. Close the Task Manager before running VKiller.

2. Do not open the Task Manager after VKiller has RMKilled the Extend Virus.
   My advice is to scan/innoculate the infected disk or disks and then hard
   reset the machine.

Hopefully someone out there in the Public Domain will be able to fill in the
'missing' code - see the FNgettaskhand() function in the !RunImage source
code for more details. If this happens, then the precautions won't be so
elaborate in future releases.

Innoculation
------------

VKiller can innoculate a !Boot file. This involves fooling the Extend Virus
that it has already infected that !Boot file by attaching the following
to the end of the file:

IconSprites <Obey$Dir>.!Sprites<&0A>
| This file has been innoculated against the Extend Virus<&0A>
||<&FF>

The IconSprites line is only included if a new !Boot is created from scratch
AND if the application directory contains an !Sprites file with the Sprite
filetype. If the original !Boot was not properly terminated by a linefeed
(<&0A>), then a linefeed will be appended prior to the addition of any
innoculation lines. Note the critical difference between the Extend Virus
infection and the innoculation: the penultimate line is terminated by <&0A>
and not <&0D>. This is how VKiller can differentiate between innoculations
and infections.

Please note that creating new innoculated !Boot files from scratch will cause
the double-click action to open a directory window to take longer because the
applications inside that window have these new !Boot files.

How do I use VKiller ?
----------------------

Double-click on the !VKiller application icon to install an icon bar icon.
[N.B. The !Boot in the !VKiller directory has itself been innoculated
      to prevent infection of its own directory.]

Once the icon bar icon appears you may press the middle button to get the
usual Info and Quit options and the left or right button to display the
VKiller dialogue box. When VKiller is first installed, it checks for the
existence of the Extend Virus module in RMA. If found, it will kill it if
possible and warn you of the fact. The Execution Count for the module will
also be displayed. From then on, whenever an application is started with
a null task name the RMA is re-scanned for the Extend Virus module.

The dialogue box has the following options...

Filing System: Click on the yellow button to cycle through the available
               filing systems. VKiller will usually start up with adfs
               as the default, but the cycle order is in filing system
               number order.

Drive:  Click on one of the available drives to select it (shown with a
        yellow background). The drive is initially set to the default one
        (e.g. for adfs, it would be the *Configure Drive option).

Dir Scan: This line displays which directory the Drive Scan has got to.
          The only exception to this is when it is used to display the
          Execution Count when the Extend Virus module is found.

Status:   General brief messages are displayed here.

The next four fields are self-explanatory and are counters for the number
of times the Extend Virus was encountered in RMA or on disk, the number of
new innoculations and the number of Drive Scans so far.

Start Drive Scan: Clicking on this will start a Drive Scan (the highlighted
                  button label becomes "Stop Drive Scan"). It may be stopped
                  at any time by clicking on the (relabelled) button again,
                  but this does not increment the Drive Scan counter.

Innoculate During Scan: Clicking on this will toggle the option to innoculate
                        ALL !Boot files with the Obey (&FEB) filetype
                        encountered during the scan. If it is not selected,
                        then any !Boot files infected with the Extend Virus
                        will still be innoculated anyway.

Notes about the Drive Scan
--------------------------

The Drive Scan is fully multi-tasking and the VKiller dialogue box does NOT
need to be open during the scan. If the dialogue box is closed during a scan,
then it will be automatically re-opened (or brought to the front if it is
already open) when an infection is found or the Drive Scan has finished.

If the Extend Virus module is run mid-way through a Drive Scan, then the
module will be automatically killed and the dialogue box will be re-opened
(as it would be if the Extend Virus module was run at any time) with a
suitable message. At the end of that Drive Scan, you are advised that the
drive may still be infected, in which case you should re-scan that drive
(and the drive that caused the infection in the first place).

Due to a bug in BASIC V (the space claimed by LOCALly DIMmed memory arrays
is not released when the procedure exits), I have had to impose the
following (very generous) restrictions:

!Boot (Obey) files longer than 5K will be skipped (a message is displayed).
Dirs nested deeper than 8 levels will be skipped (also displays message).

I have never come across any application that exceeds these values, but
if someone has one that does, please tell me, so I can modify the limits.

Request For Viruses
-------------------

Yes, this is a strange thing to ask, but could people in possesion of a virus
please send it to the address at the end of this document ? Please mark the
disc (or e-mail !) clearly that it contains a virus. I would like VKiller to
evolve to cope with other viruses (I know that there a few others floating
around, so I'd appreciate anyone's assistance in tracking them down).

Credits
-------

* Simon Burrows for supplying me with the Extend Virus module (and clearly
  marked as so, unlike certain other contacts I have :-) ).

Revision History of VKiller
---------------------------
V1.10a (January 1991) by Steve Turnbull

* Due to an assumption VKiller failed to create correct calls to filing
  systems other than ADFS. The assumption created SWI calls with lower case
  prefixes whereas they are usually upper case (SCSIFS, IDEFS and so on).
  A new routine (FNupper) was created and inserted in the appropriate place
  so now it works with my ideA hard disc!

V1.10 (December 1990)
---------------------

* Now multi-tasks with a dialogue box to select options. Code substantially
  reworked to support the WIMP (and it took longer than the guts of V1.00
  did !).

* New patch code to fix Extend Virus bug - now provides safer Wimp_CloseDown
  calls for 50% of the time. Despite this, RMKilling the module is still
  riskier than it was with V1.00.

* !Boot files to be innoculated that are not terminated by a linefeed (<&0A>)
  now have that missing linefeed added prior to innoculation.

* Extend Virus Execution Count is now displayed just before the module is
  deleted from the infected disk or killed from the RMA.

* Only !Boot files that have the Obey (&FEB) filetype can now be innoculated
  against the Extend Virus because this is only filetype that makes any 'sense'
  in the context of the innoculation.

* If an innoculated !Boot file is being created from scratch and there is
  no !Sprites file in the directory (with the Sprite filetype), then the
  IconSprites <Obey$Dir>.!Sprites line is no longer added.

V1.00 (November 1990)
---------------------

* Written as a plain single-tasking BASIC program which could also innoculate
  !Boot files against the Extend Virus.

* Recurses down directories (to a maximum level of 8) and displays various
  messages in garish red, green or yellow.

* Can remove the Extend Virus RMA module, disk module or infection of an !Boot.

Future Enhancements to VKiller
------------------------------

* Find a way to get a task handle given that task's name (this will make the
  RMKilling of the Extend Virus module a lot safer from the Desktop).

* Add support for killing (or innoculating against) other viruses.

Where to send your viruses, bug reports, fixes, enhancements etc.
-----------------------------------------------------------------

Snail Mail:             JANET e-mail:

Richard K. Lloyd,       rkl@uk.ac.liv.cs.and
1, Banks Road,
Lower Heswall,
Wirral,
Merseyside,
Great Britain
L60 9JS

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00000080  20 2d 20 54 68 65 20 45  78 74 65 6e 64 20 56 69  | - The Extend Vi|
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*
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00000d70  2d 2d 2d 2d 2d 2d 2d 2d  2d 2d 2d 2d 2d 2d 2d 2d  |----------------|
*
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00001fb0  20 20 20 20 20 20 20 20  20 20 20 20 20 20 20 20  |                |
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000025c0  20 56 69 72 75 73 65 73  0a 2d 2d 2d 2d 2d 2d 2d  | Viruses.-------|
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00002600  6b 2c 20 62 75 74 20 63  6f 75 6c 64 20 70 65 6f  |k, but could peo|
00002610  70 6c 65 20 69 6e 20 70  6f 73 73 65 73 69 6f 6e  |ple in possesion|
00002620  20 6f 66 20 61 20 76 69  72 75 73 0a 70 6c 65 61  | of a virus.plea|
00002630  73 65 20 73 65 6e 64 20  69 74 20 74 6f 20 74 68  |se send it to th|
00002640  65 20 61 64 64 72 65 73  73 20 61 74 20 74 68 65  |e address at the|
00002650  20 65 6e 64 20 6f 66 20  74 68 69 73 20 64 6f 63  | end of this doc|
00002660  75 6d 65 6e 74 20 3f 20  50 6c 65 61 73 65 20 6d  |ument ? Please m|
00002670  61 72 6b 20 74 68 65 0a  64 69 73 63 20 28 6f 72  |ark the.disc (or|
00002680  20 65 2d 6d 61 69 6c 20  21 29 20 63 6c 65 61 72  | e-mail !) clear|
00002690  6c 79 20 74 68 61 74 20  69 74 20 63 6f 6e 74 61  |ly that it conta|
000026a0  69 6e 73 20 61 20 76 69  72 75 73 2e 20 49 20 77  |ins a virus. I w|
000026b0  6f 75 6c 64 20 6c 69 6b  65 20 56 4b 69 6c 6c 65  |ould like VKille|
000026c0  72 20 74 6f 0a 65 76 6f  6c 76 65 20 74 6f 20 63  |r to.evolve to c|
000026d0  6f 70 65 20 77 69 74 68  20 6f 74 68 65 72 20 76  |ope with other v|
000026e0  69 72 75 73 65 73 20 28  49 20 6b 6e 6f 77 20 74  |iruses (I know t|
000026f0  68 61 74 20 74 68 65 72  65 20 61 20 66 65 77 20  |hat there a few |
00002700  6f 74 68 65 72 73 20 66  6c 6f 61 74 69 6e 67 0a  |others floating.|
00002710  61 72 6f 75 6e 64 2c 20  73 6f 20 49 27 64 20 61  |around, so I'd a|
00002720  70 70 72 65 63 69 61 74  65 20 61 6e 79 6f 6e 65  |ppreciate anyone|
00002730  27 73 20 61 73 73 69 73  74 61 6e 63 65 20 69 6e  |'s assistance in|
00002740  20 74 72 61 63 6b 69 6e  67 20 74 68 65 6d 20 64  | tracking them d|
00002750  6f 77 6e 29 2e 0a 0a 43  72 65 64 69 74 73 0a 2d  |own)...Credits.-|
00002760  2d 2d 2d 2d 2d 2d 0a 0a  2a 20 53 69 6d 6f 6e 20  |------..* Simon |
00002770  42 75 72 72 6f 77 73 20  66 6f 72 20 73 75 70 70  |Burrows for supp|
00002780  6c 79 69 6e 67 20 6d 65  20 77 69 74 68 20 74 68  |lying me with th|
00002790  65 20 45 78 74 65 6e 64  20 56 69 72 75 73 20 6d  |e Extend Virus m|
000027a0  6f 64 75 6c 65 20 28 61  6e 64 20 63 6c 65 61 72  |odule (and clear|
000027b0  6c 79 0a 20 20 6d 61 72  6b 65 64 20 61 73 20 73  |ly.  marked as s|
000027c0  6f 2c 20 75 6e 6c 69 6b  65 20 63 65 72 74 61 69  |o, unlike certai|
000027d0  6e 20 6f 74 68 65 72 20  63 6f 6e 74 61 63 74 73  |n other contacts|
000027e0  20 49 20 68 61 76 65 20  3a 2d 29 20 29 2e 0a 0a  | I have :-) )...|
000027f0  52 65 76 69 73 69 6f 6e  20 48 69 73 74 6f 72 79  |Revision History|
00002800  20 6f 66 20 56 4b 69 6c  6c 65 72 0a 2d 2d 2d 2d  | of VKiller.----|
00002810  2d 2d 2d 2d 2d 2d 2d 2d  2d 2d 2d 2d 2d 2d 2d 2d  |----------------|
00002820  2d 2d 2d 2d 2d 2d 2d 0a  56 31 2e 31 30 61 20 28  |-------.V1.10a (|
00002830  4a 61 6e 75 61 72 79 20  31 39 39 31 29 20 62 79  |January 1991) by|
00002840  20 53 74 65 76 65 20 54  75 72 6e 62 75 6c 6c 0a  | Steve Turnbull.|
00002850  0a 2a 20 44 75 65 20 74  6f 20 61 6e 20 61 73 73  |.* Due to an ass|
00002860  75 6d 70 74 69 6f 6e 20  56 4b 69 6c 6c 65 72 20  |umption VKiller |
00002870  66 61 69 6c 65 64 20 74  6f 20 63 72 65 61 74 65  |failed to create|
00002880  20 63 6f 72 72 65 63 74  20 63 61 6c 6c 73 20 74  | correct calls t|
00002890  6f 20 66 69 6c 69 6e 67  0a 20 20 73 79 73 74 65  |o filing.  syste|
000028a0  6d 73 20 6f 74 68 65 72  20 74 68 61 6e 20 41 44  |ms other than AD|
000028b0  46 53 2e 20 54 68 65 20  61 73 73 75 6d 70 74 69  |FS. The assumpti|
000028c0  6f 6e 20 63 72 65 61 74  65 64 20 53 57 49 20 63  |on created SWI c|
000028d0  61 6c 6c 73 20 77 69 74  68 20 6c 6f 77 65 72 20  |alls with lower |
000028e0  63 61 73 65 0a 20 20 70  72 65 66 69 78 65 73 20  |case.  prefixes |
000028f0  77 68 65 72 65 61 73 20  74 68 65 79 20 61 72 65  |whereas they are|
00002900  20 75 73 75 61 6c 6c 79  20 75 70 70 65 72 20 63  | usually upper c|
00002910  61 73 65 20 28 53 43 53  49 46 53 2c 20 49 44 45  |ase (SCSIFS, IDE|
00002920  46 53 20 61 6e 64 20 73  6f 20 6f 6e 29 2e 0a 20  |FS and so on).. |
00002930  20 41 20 6e 65 77 20 72  6f 75 74 69 6e 65 20 28  | A new routine (|
00002940  46 4e 75 70 70 65 72 29  20 77 61 73 20 63 72 65  |FNupper) was cre|
00002950  61 74 65 64 20 61 6e 64  20 69 6e 73 65 72 74 65  |ated and inserte|
00002960  64 20 69 6e 20 74 68 65  20 61 70 70 72 6f 70 72  |d in the appropr|
00002970  69 61 74 65 20 70 6c 61  63 65 0a 20 20 73 6f 20  |iate place.  so |
00002980  6e 6f 77 20 69 74 20 77  6f 72 6b 73 20 77 69 74  |now it works wit|
00002990  68 20 6d 79 20 69 64 65  41 20 68 61 72 64 20 64  |h my ideA hard d|
000029a0  69 73 63 21 0a 0a 56 31  2e 31 30 20 28 44 65 63  |isc!..V1.10 (Dec|
000029b0  65 6d 62 65 72 20 31 39  39 30 29 0a 2d 2d 2d 2d  |ember 1990).----|
000029c0  2d 2d 2d 2d 2d 2d 2d 2d  2d 2d 2d 2d 2d 2d 2d 2d  |----------------|
000029d0  2d 0a 0a 2a 20 4e 6f 77  20 6d 75 6c 74 69 2d 74  |-..* Now multi-t|
000029e0  61 73 6b 73 20 77 69 74  68 20 61 20 64 69 61 6c  |asks with a dial|
000029f0  6f 67 75 65 20 62 6f 78  20 74 6f 20 73 65 6c 65  |ogue box to sele|
00002a00  63 74 20 6f 70 74 69 6f  6e 73 2e 20 43 6f 64 65  |ct options. Code|
00002a10  20 73 75 62 73 74 61 6e  74 69 61 6c 6c 79 0a 20  | substantially. |
00002a20  20 72 65 77 6f 72 6b 65  64 20 74 6f 20 73 75 70  | reworked to sup|
00002a30  70 6f 72 74 20 74 68 65  20 57 49 4d 50 20 28 61  |port the WIMP (a|
00002a40  6e 64 20 69 74 20 74 6f  6f 6b 20 6c 6f 6e 67 65  |nd it took longe|
00002a50  72 20 74 68 61 6e 20 74  68 65 20 67 75 74 73 20  |r than the guts |
00002a60  6f 66 20 56 31 2e 30 30  0a 20 20 64 69 64 20 21  |of V1.00.  did !|
00002a70  29 2e 0a 0a 2a 20 4e 65  77 20 70 61 74 63 68 20  |)...* New patch |
00002a80  63 6f 64 65 20 74 6f 20  66 69 78 20 45 78 74 65  |code to fix Exte|
00002a90  6e 64 20 56 69 72 75 73  20 62 75 67 20 2d 20 6e  |nd Virus bug - n|
00002aa0  6f 77 20 70 72 6f 76 69  64 65 73 20 73 61 66 65  |ow provides safe|
00002ab0  72 20 57 69 6d 70 5f 43  6c 6f 73 65 44 6f 77 6e  |r Wimp_CloseDown|
00002ac0  0a 20 20 63 61 6c 6c 73  20 66 6f 72 20 35 30 25  |.  calls for 50%|
00002ad0  20 6f 66 20 74 68 65 20  74 69 6d 65 2e 20 44 65  | of the time. De|
00002ae0  73 70 69 74 65 20 74 68  69 73 2c 20 52 4d 4b 69  |spite this, RMKi|
00002af0  6c 6c 69 6e 67 20 74 68  65 20 6d 6f 64 75 6c 65  |lling the module|
00002b00  20 69 73 20 73 74 69 6c  6c 0a 20 20 72 69 73 6b  | is still.  risk|
00002b10  69 65 72 20 74 68 61 6e  20 69 74 20 77 61 73 20  |ier than it was |
00002b20  77 69 74 68 20 56 31 2e  30 30 2e 0a 0a 2a 20 21  |with V1.00...* !|
00002b30  42 6f 6f 74 20 66 69 6c  65 73 20 74 6f 20 62 65  |Boot files to be|
00002b40  20 69 6e 6e 6f 63 75 6c  61 74 65 64 20 74 68 61  | innoculated tha|
00002b50  74 20 61 72 65 20 6e 6f  74 20 74 65 72 6d 69 6e  |t are not termin|
00002b60  61 74 65 64 20 62 79 20  61 20 6c 69 6e 65 66 65  |ated by a linefe|
00002b70  65 64 20 28 3c 26 30 41  3e 29 0a 20 20 6e 6f 77  |ed (<&0A>).  now|
00002b80  20 68 61 76 65 20 74 68  61 74 20 6d 69 73 73 69  | have that missi|
00002b90  6e 67 20 6c 69 6e 65 66  65 65 64 20 61 64 64 65  |ng linefeed adde|
00002ba0  64 20 70 72 69 6f 72 20  74 6f 20 69 6e 6e 6f 63  |d prior to innoc|
00002bb0  75 6c 61 74 69 6f 6e 2e  0a 0a 2a 20 45 78 74 65  |ulation...* Exte|
00002bc0  6e 64 20 56 69 72 75 73  20 45 78 65 63 75 74 69  |nd Virus Executi|
00002bd0  6f 6e 20 43 6f 75 6e 74  20 69 73 20 6e 6f 77 20  |on Count is now |
00002be0  64 69 73 70 6c 61 79 65  64 20 6a 75 73 74 20 62  |displayed just b|
00002bf0  65 66 6f 72 65 20 74 68  65 20 6d 6f 64 75 6c 65  |efore the module|
00002c00  20 69 73 0a 20 20 64 65  6c 65 74 65 64 20 66 72  | is.  deleted fr|
00002c10  6f 6d 20 74 68 65 20 69  6e 66 65 63 74 65 64 20  |om the infected |
00002c20  64 69 73 6b 20 6f 72 20  6b 69 6c 6c 65 64 20 66  |disk or killed f|
00002c30  72 6f 6d 20 74 68 65 20  52 4d 41 2e 0a 0a 2a 20  |rom the RMA...* |
00002c40  4f 6e 6c 79 20 21 42 6f  6f 74 20 66 69 6c 65 73  |Only !Boot files|
00002c50  20 74 68 61 74 20 68 61  76 65 20 74 68 65 20 4f  | that have the O|
00002c60  62 65 79 20 28 26 46 45  42 29 20 66 69 6c 65 74  |bey (&FEB) filet|
00002c70  79 70 65 20 63 61 6e 20  6e 6f 77 20 62 65 20 69  |ype can now be i|
00002c80  6e 6e 6f 63 75 6c 61 74  65 64 0a 20 20 61 67 61  |nnoculated.  aga|
00002c90  69 6e 73 74 20 74 68 65  20 45 78 74 65 6e 64 20  |inst the Extend |
00002ca0  56 69 72 75 73 20 62 65  63 61 75 73 65 20 74 68  |Virus because th|
00002cb0  69 73 20 69 73 20 6f 6e  6c 79 20 66 69 6c 65 74  |is is only filet|
00002cc0  79 70 65 20 74 68 61 74  20 6d 61 6b 65 73 20 61  |ype that makes a|
00002cd0  6e 79 20 27 73 65 6e 73  65 27 0a 20 20 69 6e 20  |ny 'sense'.  in |
00002ce0  74 68 65 20 63 6f 6e 74  65 78 74 20 6f 66 20 74  |the context of t|
00002cf0  68 65 20 69 6e 6e 6f 63  75 6c 61 74 69 6f 6e 2e  |he innoculation.|
00002d00  0a 0a 2a 20 49 66 20 61  6e 20 69 6e 6e 6f 63 75  |..* If an innocu|
00002d10  6c 61 74 65 64 20 21 42  6f 6f 74 20 66 69 6c 65  |lated !Boot file|
00002d20  20 69 73 20 62 65 69 6e  67 20 63 72 65 61 74 65  | is being create|
00002d30  64 20 66 72 6f 6d 20 73  63 72 61 74 63 68 20 61  |d from scratch a|
00002d40  6e 64 20 74 68 65 72 65  20 69 73 0a 20 20 6e 6f  |nd there is.  no|
00002d50  20 21 53 70 72 69 74 65  73 20 66 69 6c 65 20 69  | !Sprites file i|
00002d60  6e 20 74 68 65 20 64 69  72 65 63 74 6f 72 79 20  |n the directory |
00002d70  28 77 69 74 68 20 74 68  65 20 53 70 72 69 74 65  |(with the Sprite|
00002d80  20 66 69 6c 65 74 79 70  65 29 2c 20 74 68 65 6e  | filetype), then|
00002d90  20 74 68 65 0a 20 20 49  63 6f 6e 53 70 72 69 74  | the.  IconSprit|
00002da0  65 73 20 3c 4f 62 65 79  24 44 69 72 3e 2e 21 53  |es <Obey$Dir>.!S|
00002db0  70 72 69 74 65 73 20 6c  69 6e 65 20 69 73 20 6e  |prites line is n|
00002dc0  6f 20 6c 6f 6e 67 65 72  20 61 64 64 65 64 2e 0a  |o longer added..|
00002dd0  0a 56 31 2e 30 30 20 28  4e 6f 76 65 6d 62 65 72  |.V1.00 (November|
00002de0  20 31 39 39 30 29 0a 2d  2d 2d 2d 2d 2d 2d 2d 2d  | 1990).---------|
00002df0  2d 2d 2d 2d 2d 2d 2d 2d  2d 2d 2d 2d 0a 0a 2a 20  |------------..* |
00002e00  57 72 69 74 74 65 6e 20  61 73 20 61 20 70 6c 61  |Written as a pla|
00002e10  69 6e 20 73 69 6e 67 6c  65 2d 74 61 73 6b 69 6e  |in single-taskin|
00002e20  67 20 42 41 53 49 43 20  70 72 6f 67 72 61 6d 20  |g BASIC program |
00002e30  77 68 69 63 68 20 63 6f  75 6c 64 20 61 6c 73 6f  |which could also|
00002e40  20 69 6e 6e 6f 63 75 6c  61 74 65 0a 20 20 21 42  | innoculate.  !B|
00002e50  6f 6f 74 20 66 69 6c 65  73 20 61 67 61 69 6e 73  |oot files agains|
00002e60  74 20 74 68 65 20 45 78  74 65 6e 64 20 56 69 72  |t the Extend Vir|
00002e70  75 73 2e 0a 0a 2a 20 52  65 63 75 72 73 65 73 20  |us...* Recurses |
00002e80  64 6f 77 6e 20 64 69 72  65 63 74 6f 72 69 65 73  |down directories|
00002e90  20 28 74 6f 20 61 20 6d  61 78 69 6d 75 6d 20 6c  | (to a maximum l|
00002ea0  65 76 65 6c 20 6f 66 20  38 29 20 61 6e 64 20 64  |evel of 8) and d|
00002eb0  69 73 70 6c 61 79 73 20  76 61 72 69 6f 75 73 0a  |isplays various.|
00002ec0  20 20 6d 65 73 73 61 67  65 73 20 69 6e 20 67 61  |  messages in ga|
00002ed0  72 69 73 68 20 72 65 64  2c 20 67 72 65 65 6e 20  |rish red, green |
00002ee0  6f 72 20 79 65 6c 6c 6f  77 2e 0a 0a 2a 20 43 61  |or yellow...* Ca|
00002ef0  6e 20 72 65 6d 6f 76 65  20 74 68 65 20 45 78 74  |n remove the Ext|
00002f00  65 6e 64 20 56 69 72 75  73 20 52 4d 41 20 6d 6f  |end Virus RMA mo|
00002f10  64 75 6c 65 2c 20 64 69  73 6b 20 6d 6f 64 75 6c  |dule, disk modul|
00002f20  65 20 6f 72 20 69 6e 66  65 63 74 69 6f 6e 20 6f  |e or infection o|
00002f30  66 20 61 6e 20 21 42 6f  6f 74 2e 0a 0a 46 75 74  |f an !Boot...Fut|
00002f40  75 72 65 20 45 6e 68 61  6e 63 65 6d 65 6e 74 73  |ure Enhancements|
00002f50  20 74 6f 20 56 4b 69 6c  6c 65 72 0a 2d 2d 2d 2d  | to VKiller.----|
00002f60  2d 2d 2d 2d 2d 2d 2d 2d  2d 2d 2d 2d 2d 2d 2d 2d  |----------------|
00002f70  2d 2d 2d 2d 2d 2d 2d 2d  2d 2d 0a 0a 2a 20 46 69  |----------..* Fi|
00002f80  6e 64 20 61 20 77 61 79  20 74 6f 20 67 65 74 20  |nd a way to get |
00002f90  61 20 74 61 73 6b 20 68  61 6e 64 6c 65 20 67 69  |a task handle gi|
00002fa0  76 65 6e 20 74 68 61 74  20 74 61 73 6b 27 73 20  |ven that task's |
00002fb0  6e 61 6d 65 20 28 74 68  69 73 20 77 69 6c 6c 20  |name (this will |
00002fc0  6d 61 6b 65 20 74 68 65  0a 20 20 52 4d 4b 69 6c  |make the.  RMKil|
00002fd0  6c 69 6e 67 20 6f 66 20  74 68 65 20 45 78 74 65  |ling of the Exte|
00002fe0  6e 64 20 56 69 72 75 73  20 6d 6f 64 75 6c 65 20  |nd Virus module |
00002ff0  61 20 6c 6f 74 20 73 61  66 65 72 20 66 72 6f 6d  |a lot safer from|
00003000  20 74 68 65 20 44 65 73  6b 74 6f 70 29 2e 0a 0a  | the Desktop)...|
00003010  2a 20 41 64 64 20 73 75  70 70 6f 72 74 20 66 6f  |* Add support fo|
00003020  72 20 6b 69 6c 6c 69 6e  67 20 28 6f 72 20 69 6e  |r killing (or in|
00003030  6e 6f 63 75 6c 61 74 69  6e 67 20 61 67 61 69 6e  |noculating again|
00003040  73 74 29 20 6f 74 68 65  72 20 76 69 72 75 73 65  |st) other viruse|
00003050  73 2e 0a 0a 57 68 65 72  65 20 74 6f 20 73 65 6e  |s...Where to sen|
00003060  64 20 79 6f 75 72 20 76  69 72 75 73 65 73 2c 20  |d your viruses, |
00003070  62 75 67 20 72 65 70 6f  72 74 73 2c 20 66 69 78  |bug reports, fix|
00003080  65 73 2c 20 65 6e 68 61  6e 63 65 6d 65 6e 74 73  |es, enhancements|
00003090  20 65 74 63 2e 0a 2d 2d  2d 2d 2d 2d 2d 2d 2d 2d  | etc..----------|
000030a0  2d 2d 2d 2d 2d 2d 2d 2d  2d 2d 2d 2d 2d 2d 2d 2d  |----------------|
*
000030d0  2d 2d 2d 2d 2d 2d 2d 0a  0a 53 6e 61 69 6c 20 4d  |-------..Snail M|
000030e0  61 69 6c 3a 20 20 20 20  20 20 20 20 20 20 20 20  |ail:            |
000030f0  20 4a 41 4e 45 54 20 65  2d 6d 61 69 6c 3a 0a 0a  | JANET e-mail:..|
00003100  52 69 63 68 61 72 64 20  4b 2e 20 4c 6c 6f 79 64  |Richard K. Lloyd|
00003110  2c 20 20 20 20 20 20 20  72 6b 6c 40 75 6b 2e 61  |,       rkl@uk.a|
00003120  63 2e 6c 69 76 2e 63 73  2e 61 6e 64 0a 31 2c 20  |c.liv.cs.and.1, |
00003130  42 61 6e 6b 73 20 52 6f  61 64 2c 0a 4c 6f 77 65  |Banks Road,.Lowe|
00003140  72 20 48 65 73 77 61 6c  6c 2c 0a 57 69 72 72 61  |r Heswall,.Wirra|
00003150  6c 2c 0a 4d 65 72 73 65  79 73 69 64 65 2c 0a 47  |l,.Merseyside,.G|
00003160  72 65 61 74 20 42 72 69  74 61 69 6e 0a 4c 36 30  |reat Britain.L60|
00003170  20 39 4a 53 0a                                    | 9JS.|
00003175

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