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BootX v3.50 User Manual
January 30, 1990
Requires the arp.library
DISCLAIMER
BootX has been thoroughly tested and is the result of a constant process of
changes and updates that started in April 1989. The program has proven to
be stable in everyday use. The author is not responsible for any loss of
data, damages to software or hardware that may result directly or
indirectly from the use of this program.
The BootX package consists of:
BootX3.50 The program file
BootX.BBLib The BootX bootblock library
BootX.Brain An example of a brainfile
BootX3.50.doc This file
Note that the BootX.BBLib nor the BootX.Brain files are required to run the
program. BootX will display an errormessage when either of these two files
are not found. See further.
This documentation will always be updated at the top. Users of previous
versions of BootX need only read the paragraphs reflecting the changes
since their last version.
Changes from BootX v3.40
------------------------
- Expanded the memory checker
- Fixed a bug in the error exit routine (in case the arp.library wasn't
found)
- Rewrote the CheckFiles routine again to use a FIFO software stack instead
of being recursive. CheckFiles can be interrupted again by pressing any
mousebutton.
- Fixed a bug in the name printing routine of the linkviruses. I
accidentally switch the arguments for _LVOPrintf.
- Added a lot of new recog ID's for bootblockviruses.
- BootX v3.50 now recognizes 10 linkviruses:
IRQ Butonic
BSG-9 (TTV1) CCCP
Lamer Exterminator Jack
Xeno Centurion
Disaster Master TTV1 2
- Special thanks go to Erik Løvendahl Sørensen for giving me access to his
virus databank. For more information and Erik's address, refer to the
bottom of this doc file.
Changes from BootX v3.30
------------------------
- Added a check for the Peter Stuer Anti-Virus 3.0 bootblock
- Cleanup up a lot of the code
- Squashed some potential bugs
- Completely rewrote the LinkVirusCheck routine to use a client call-back
function.
- Completely rewrote the MemoryCheck routine and added a few more vectors
to check.
- Added checks for 2 more bootblocks and 7 more bootblockviruses
- Added checks for several new linkviruses.
- Rewrote the BootBlock library routines
- BootX now detects if another copy is running. This was asked by some
users who always forgot they still had a dormant copy of BootX hanging
around on the Workbench.
- For users of the SetPatch -r option BootX now asks if it is allright to
reset any memory vectors.
- More vectors are shown that are potential targets for viruses.
- Fix a bug in the View Brainfile option.
- Fix a bug in the Save Brainfile option.
- Added the Merge Brainfile option:
Since version 3.30 BootX has been able to create brainfiles. This option
allows you to 'merge' a brainfile you got from a friend. BootX takes care
of all the details. It won't add any signatures that already exist. You
select the brainfile you wish to merge in the ARP file requester. Merging
occurs in memory, so don't forget to save the updated brainfile (BootX
will warn you though.
- Fixed a bug in the startup code. BootX now uses the same current
directory as the CLI it was started from.
- Added the Quit menuitem
Changes from BootX v3.20 (The big one)
--------------------------------------
- Fixed a bug in the font name. BootX should now always use the Topaz 80
font (Hopefully).
- Fixed a bug in the startup code.
- Optimized the code completely
- BootX now checks for viruses on startup
- Completely rewrote the MemoryCheck routine
- All information is now printed using a console (Now I can use formated
output for several functions. For the Amiga programmers: I understand
the RawDoFmt() function now (at last)).
- Completely rewrote the link virus check routine. It can be stopped by
pressing the left mousebutton.
- BootX tries to reconise a bootblock that is loaded.
- Added checks for PVL Virus Protector 6.5 and Anti-Virus 2.0 and added
both to the built-in bootblocks.
- Removed some of the spelling errors from this doc file
Changes from BootX v3.1
------------------------
- Fixed a bug in the new recognition routine.
Changes from BootX v3.0
-----------------------
- Some internal code optimizations.
- Added Anti-Virus 1.0 from Peter Stuer.
- Finally removed the NorthStar 2 bootblock from the installable bootblocks.
Changes from BootX v2.9
-----------------------
- Reformated this doc file so it can be read from the CLI using type.
- The detection on/off switch now flashes when it is selected.
- Added a new bootblock to the recog list.
- Added my own viruschecker to the installable bootblocks:
Thor Anti-Virus v1.0
When you boot a disk with this bootblock, it first checks the ExecBase
vectors that are most likely to change when a virus installs itself. For
the programmers among you: ColdCapture, CoolCapture (WarmCapture isn't
supported in KickStart1.2 and 1.3), KickMemPtr, KickTagPtr and
KickCheckSum. OldOpenLibrary (IRQ Virus) and PutMsg or DoIO are not
checked because these vectors are reset upon booting. When nothing
suspicious is found, a title picture is shown signaling everything is OK.
You can either wait or click the left mousebutton to continue. When Thor
Anti-Virus v1.0 finds something in the above mentioned vectors the screen
flashes red for a short period. It is up to you to react within this
period and click the right mousebutton. When you NOTHING is changed and
all vectors are left alone. I put in this option because some programs
(TurboPrint, ATool) use these vectors to stay resident. Note that there is
no way telling wheter there is a virus in memory or some useful resident
code. When you don't press the right mousebutton, Thor Anti-Virus resets
ExecBase and TRASHES any code found in the Resident vectors. I found this
the only effective way of killing a Resident structure in this little code.
I know its not pretty but its damn effective !!! The Amiga then resets as
if nothing happened. Normally you should only get the title screen then.
Thor Anti-Virus v1.0 works completely legally, that is reserving memory for
its screen and structure, so it should be compatible with KickStart 1.3 and
1.4(?). I have not had a chance to try this out. If you have any problems
please let me know.
Short introduction
------------------
BootX v3.50 is an attempt to make the ultimate viruskiller. BootX v3.50 is
fast (written completely in assembler), small and tries to be as user
friendly as possible (use of the arp.library).
This program is freeware. It can be copied by anyone except for commercial
use as long as this documentation file and the program icon accompanies the
program. Note that this program requires the Arp library to run. No
source code accompanies this program for the obvious reason that everybody
would be able to change the checking algorithm.
If you find any new viruses or linkviruses that BootX does not recognize
yet, please send them on a disk to me (my address is at the bottom of this
document). I will return the disk to you with an updated copy of BootX.
P. Stuer
How to start BootX v3.50
------------------------
BootX v3.50 (from here on referred to as BootX) was written to be used by
both beginners and experienced users. BootX can be started both from CLI
and the Workbench.
Starting BootX from the CLI
To start BootX from the CLI simply type:
1> BootX3.50
followed by a return. This loads the BootX program and starts it. BootX
then detaches itself from the CLI. This means that you can start BootX,
bring the Workbench screen back to the front and then close the CLI window
with the EndCLI command.
Starting BootX from the WorkBench
This is the easy part. Simply click on the accompaning icon and BootX
starts.
How to use BootX v3.50
----------------------
A lot of viruscheckers and viruskillers are already written for the Amiga
but none of them offered all the features I needed. Hence the various
disks offering several different programs for doing the job. Enters BootX.
BootX can check the bootblock of a disk, check memory for any resident
viruses and scan a disk for linkviruses. It can load bootblock libraries
for you to write on your disks as an alternative for the boring DOS Install
bootblock. It can load "brain files" so you can add any new bootblocks
that BootX does not recognise yet.
Let's start a guided tour of the screen. The main screen offers several
gadgets (I hate menus when I want to work fast). Just click the
appropriate gadget to perform an action.
Quit
Does just what the gadget says: it releases all used memory and
quits the program.
Read to buffer
This gadget explicitly instructs BootX to read the bootblock from
the current selected drive into the buffer. Normally BootX detects when a
new disk is inserted and automatically reads its bootblock. But some old 5
1/4 drives don't support automatic diskchange. This gadget can also be
used to read the bootblock after another programs has modified the
bootblock.
Write to buffer
Here you instruct BootX to write the bootblock currently in the
buffer to the selected drive. BootX maintains a buffer that holds the last
read bootblock. This buffer is also visible in the large display window in
semi-ASCII form (more about this later). The buffer allows you to read a
bootblock from one disk and then copy it to another.
The 4 drive gadgets
You can connect 4 disk drives to the Amiga. BootX checks how many drives
are connected to the Amiga and installs a gadget for every one of them.
When a drive is not found the gadget will read "N/A": not available. Note
that although a drive is connected the Amiga will not recognize its
presence when it is turned off (only applicable for external drives).
Install BootBlock
Here you can write the selected built-in bootblock to the bootblock of the
current drive.
When no bootblock library is loaded only the normal Install v1.3 bootblock
is available. At startup BootX looks for a file called "BootX.BBLib" in
the directory from which BootX started. It contains several alternative
bootblocks. It is possible to load another bootblock library using the
"Load bootblock library" menuitem (see further).
Next and Previous
These gadgets show the next or the previous bootblocks in the currently
loaded bootblock library. If no library is loaded, only the normal Install
1.3 bootblock will be available. Among the bootblocks are the normal DOS
bootblock, Ralph Babel's Install2 and several others. Thanks to all groups
and programmers whose bootblock I included. Note however that when you
press Next and Previous the bootblock buffer is not updated.
BootBlock window
This window shows the name of the selected built-in bootblock.
Message window
This window reports messages and errors resulting from the various
operations.
Main display window
Shows the bootblock currently in the buffer in semi-ASCII representation.
Only the readable characters are shown. This allows you to check for
readable text signifying the nature of the bootblock when BootX reports
"Unknown bootblock".
About
Display information about BootX and the version number. Always try to get
the latest version available to have optimum virus protection.
Load from/Save to file
BootX can save the bootblock in the buffer to any valid Amiga device.
'Save to file' can be used to save the bootblocks of games, mega demos and
other programs to a separate data disk. In case of a virus attack or a bad
disk you can load the previously saved bootblock back in the buffer and
write it back to the original disk. Note: no checking is done on the
loaded bootblock. So it is possible to load f.i. the parallel.device and
write it to the boot block. This allows you to write self-made bootblock
to the disk. BootX now asks you if it should correct the bootblock
checksum when it is wrong.
Memory check
Checks the memory for any known virus ignoring all known resident virus
checkers. When BootX finds a virus it will display an Alert identifying
which virus was in memory and will try to kill it. BootX also removes any
known linkvirus from memory.
BootX also shows some important vectors from Execbase in the main display
window. These vectors are mostly altered by viruses. A normal vector will
be display in white. When BootX thinks that something is not normal it
will display the vector in white on red. Note that this not necessarily
means that there is a virus in memory. Resident programs as f.i.
TurboPrint use these vectors too. I will try to keep BootX's knowledge
base as up to date as possible. In case of doubt, save all data and
cold-start the Amiga, that is, turn of the power and wait a few seconds
before turning it on again.
Goto sleep
Closes the main BootX screen and releases as much memory as possible. A
small window on the workbench screen is opened showing that you that BootX
is still in memory. In this state BootX uses no CPU time and just waits
for you to make the window active and click in it with the menu button (the
right mouse button). Then the main BootX screen and window is opened again
and you can go on again. BootX does not unload a brain file or a bootblock
library. Also, when asleep BootX doesn't do any checking ( like VirusX
does). I did this on purpose. There is no need to continuously keep
checking every disk that is inserted. Just check them once to make sure
there virus-free.
Kill LinkVirus
This gadget pops up the file requester for you to specify a device to
search for linkviruses. In the current version this can only be a device.
Later version will support directory and file checking (NOTE: as of BootX
v3.40 directories can be specified also). When you select OK BootX starts
searching for linkviruses in any executable file it encounters. Note that
the complete disk is searched. In case BootX finds a link virus you are
given the option to remove it from the infected file. BootX removes the
linkvirus and save the file under the same name with an extension ".bx".
Currently only the IRQ and the TTV1 linkviruses are checked for (NOTE:
BootX 3.40 and higher recognize more linkviruses).
Help
This gadget toggles the help feature. When it is turned on you can click
any gadget to get a short help message about its function. Click Help
again to turn off the help feature.
Detection on/off
This gadget works as an on/off switch. It turns off diskchange detection.
Sometimes it is not useful to have BootX read the bootblock of every disk
you insert, especially when you have a bootblock in the buffer you wish to
write to another disk. This gadget allows one drive user to copy
bootblocks.
Learn
Clicking this gadget prompts you for a name when BootX does not known the
bootblock in the buffer yet. Enter an empty string when you want to cancel
the operation. BootX then adds the bootblock to the current brain file (if
present). Else it makes a brain file in memory.
The Menu
--------
Load Bootblock library
Selecting this menuitem (or the key combination Right-Amiga-B) allows you
to load another bootblock library than the default BootX.BBLib
Load Brainfile
Selecting this menuitem (or the key combination Right-Amiga-L) allows you
to load another brainfile than the default BootX.Brain. BootX will load
only valid brainfiles. Before loading it asks you if you want this
brainfile to replace the one in memory.
Save Brainfile
Selecting this menuitem (or the key combination Right-Amiga-S) allows you
to save the brainfile that is currently in memory.
Learn Bootblock
Selecting this menuitem (or the key combination Right-Amiga-A) is the same
as clicking on the Learn gadget (see higher).
I realize this documentation is brief but I made BootX to be as intuitively
as possible. BootX is updated frequently to recognize new bootblocks and
viruses.
These are the bootblocks and bootviruses BootX v3.50 recognizes:
16 Bit Crew virus
ACID Virus Terminator 1.0
Alien New Beat virus
Anti-Virus BootBlock v1.0
Anti-Virus BootBlock v2.0
Anti-Virus BootBlock v3.0
ASS Virus Protector 1.0
ATOM VirKill v2.0
Australian Parasite virus
Avirex bootblock
Avirex Time Bomb 1.0
BlackFlash 2.0 virus
Blizzard Protector v1.0
Boot Menu v2.0 by Peter Stuer
Boot Menu v3.0 by Peter Stuer
BooTune 1.2
Butonics (BAHA) virus
Byte Bandit virus
Byte Bandit virus (Forpib mutant)
Byte Warrior or DASA virus
CCCP virus
CCS Boot v2.0
Claas Abraham virus
Cleared DOS Disk
CList virus
Coder's Nightmare virus
Destructor 1.2 virus
DevWare Anti-Virus bootblock
Dietmar Noll Viruschecker
Digital Emotions virus
Disk Herpes (Phantastograph) virus
DiskDoktors virus
DiskGuard 1.0
DOC Memory & Drive killer
F.A.S.T. virus
F.I.C.A. virus
Gadaffi virus
Graffiti virus
Gremlins virus
GX Team virus
HCS 4220 Anti-Virus bootblock
Install 2 by Ralph Babel
Installed DOS Disk
JITR (Atari) virus
Joshua 2 virus
Joshua virus
Jungle Command Bootleg
Kruki virus
Lamer Exterminator virus
MegaMaster virus
Microsystems virus
Obilisk virus
Opapa virus
PvL Sound Bootblock
PvL Virus Protector 5.0
PvL Virus Protector 5.4
PvL Virus Protector 6.0
PvL Virus Protector 6.1
PvL Virus Protector 6.3
PvL Virus Protector 6.4
PvL Virus Protector 6.5
Razor 1911 Memory Controller
Replica Copy Crew Utility Boot 5.0
Revenge Bootblock Loader virus
Revenge virus v1.2
SCA virus
SCA Virus Protector v1.0
SCA virus: BS1 mutant
SCA virus: DAG mutant
SCA virus: Iceman mutant
SCA virus: LSD mutant
SCA virus: Micro Master mutant
Scarface virus
Sendarian virus
Sinister Syndicate virus
StarFire 2
StarFire/NorthStar Antivirus 1.0
StarFire/NorthStar Antivirus 2.0
Supply Team Viruskiller
Switch Off virus
System Z Virus Protector v3.0
System Z Virus Protector v4.0
Target virus
Termigator virus
The Outlaw Virus Checker 1.42
The Pentagon Circle VirusSlayer
Thor Anti-Virus 1.0
Thor Menu Boot v2.0
TIB Bootblock Copy
TIP Installed Disk
TIP Memory Allocator 1.3
TIP Memory Controller 1.2
TIP Memory Controller 1.3
TIP NoFastMem BootBlock 1.1
TRISTAR Viruskiller v1.3
Turk virus
UltraFox virus
Uninstalled DOS Disk
USI Bootwriter
Virus (Name unknown)
Virus Destructor 1.0
Virus Destructor 2.0
Virus Predator (Spain)
VKill virus
Warhawk virus
X-Copy II boot
Peter Stuer
Kauwlei 21
B-2550 Kontich
Belgium - Europe
::: Virus Data Bank for programmers ::::::::::::::::::::::::::::::::::::::
Erik Løvendahl Sørensen has been keeping track of boot- and linkviruses on
the Amiga. He has started a data bank with international support that is
open for viruskiller programmers to use and contribute to. For more
information contact Erik at:
Erik Løvendahl Sørensen
Snaphanevej 10
4720 Præstø
Denmark
Phone: + 45 53 79 25 12
_
_ //
Thanks to \X/ Amiga for being the best computer ever !
Thanks to BSB for beta testing and giving useful comments.