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- -=> Doctor Crunch <=-
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-
- Ok, you probably have read t-files
- about how to break in a bbs. so, I will
- tell you what to do when you get into
- the bbs. Most sysops, if they have an
- IQ, will disable the INIT command. they
- usually do this by changing the INIT
- command to some other word you will
- never guess. Well, there is an easier
- way to crash the bbs than by searching
- for what the sysop changed it to. Get
- in the moniter (CALL-151), and type:
-
- A54FG
-
- This is the INIT command's entry point
- which DOS calls to initialize a disk.
- There are some bugs with this way of
- crashing a disk though:
-
- 1) It takes about 40 seconds to INIT
- a disk, and if a sysop is there,
- he can stop you at any time.
-
- 2) Many boards use a fast dos; and,
- most fast-DOSes had to take out
- the INIT command to make the mods
- to DOS. So, even if you do a
- A54FG, you won't be able to kill
- the disk.
-
- I prefer to kill the VTOC, instead
- of INITing the disk. Here are a couple
- of reasons why:
-
- 1) Very quick!!!!!
-
- 2) Very nasty!!!!!
-
- The trick is to rewrite the VTOC
- (Volume Table Of Contents) to say that
- the CATALOG track is 255. Now all of us
- know there is no track 255 on a disk,
- this can only mean.....(you guessed it)
- that the system will bomb when doing
- anything that involves looking at the
- CATALOG track. Since almost everything
- you can do in DOS involves reading the
- CATALOG track, this will crash the bbs
- quite well. And here is a nice little
- catch, you can reboot his disk (which
- will give him an I/O ERROR because
- when the hello file is run, DOS must
- look at the CATALOG track) and logoff
- at the same time. You should always
- logoff quickly so that the sysop can't
- lift up the phone, which sometimes will
- prevent you from hanging up. The way I
- logoff is the make the bbs I just
- crashed do a reset, causing me to be
- disconnected from the other end of the
- line. Since most terminal programs
- hang up if you loose the carrier (which
- will happen when his system resets),
- you will hang up the second you crash
- his system!!!!
-
- Well, here it is:
-
- (Be sure you're in the moniter)
-
- *B3BC:FF NAFFBG 3F4:00 NFA62G
-
- If you don't want to logoff,
-
- *B3BC:FF NAFFBG
-
- NOTE: Sometimes you may hear a beep,
- then all of your moniter commands
- will fail. This is because of a
- bug in DOS. When RWTS lets go of
- control, the moniter varible $48
- is destroyed. To work properly,
- $48 must be restored to 0 before
- the moniter takes control again.
- I made a short routine that when
- called, writes the VTOC buffer to
- the disk, and sets $48 to 0. The
- routine is:
-
- 300- 20 FB AF JSR $AFFB
-