51 lines
2.2 KiB
Plaintext
51 lines
2.2 KiB
Plaintext
|
*:*:*:*:*:*:*:*:*:*:*:*:*:*:*:*:*:*:*
|
|||
|
|
:* *:
|
|||
|
|
*: High Technology's :*
|
|||
|
|
:* Cracking Tutorial *:
|
|||
|
|
*: :*
|
|||
|
|
:*:*:*:*:*:*:*:*:*:*:*:*:*:*:*:*:*:*:
|
|||
|
|
|
|||
|
|
Written by:
|
|||
|
|
High Technology & Sherlock Apple!
|
|||
|
|
|
|||
|
|
Written for: Sherwood Forest ][ and Sherwood Forest ///
|
|||
|
|
|
|||
|
|
=-----------------------------------------------------------------------------=
|
|||
|
|
This weeks topic: Mr. Cool
|
|||
|
|
=-----------------------------------------------------------------------------=
|
|||
|
|
|
|||
|
|
Mr. Cool is a 3-dimensional Q-Bert type game that has copy protection differ
|
|||
|
|
ent that the others described in this tutorial so far.
|
|||
|
|
|
|||
|
|
=> Boot your DOS 3.3 system master and insert a blank disk
|
|||
|
|
=> Type INIT HELLO. When you get the ] or > prompt, type DELETE HELLO.
|
|||
|
|
=> Insert Mr. Cool disk and type "BRUN MRCOOL"
|
|||
|
|
=> When the picture comes up, hit [ RESET ]. Type "CALL -151" to enter monitor.
|
|||
|
|
=> Type 4000: EA EA EA (this removes the nibble count)
|
|||
|
|
=> Type 8500: 60 (this removes the high score read)
|
|||
|
|
=> Type 876C: 60 (this removes the high score write)
|
|||
|
|
=> Insert the disk you just formatted and type "BSAVE MR. COOL,A$4000,L$5500"
|
|||
|
|
|
|||
|
|
Notes: The "4000: EA EA EA" is the start of the nibble count routine. Putting
|
|||
|
|
"EA EA EA" in locations $4000-$4002 places the NOP (or No OPeration) code in
|
|||
|
|
place of the jump to the nibble count. The "8500: 60" removes the high score
|
|||
|
|
read routine. The routine starts at $8500 and by placing a $60 (ReTurn from
|
|||
|
|
Subroutine) it never executes the routine and jumps back to the main progam.
|
|||
|
|
"876C: 60" removes the high score write. It is the same as above. The reason
|
|||
|
|
for disabling the high score functions is simple. If not disabled, when the
|
|||
|
|
high socres are written to the disk, it would overwrite part of the MR. COOL
|
|||
|
|
file or whatever else happens to be on the sectors that it uses to store the
|
|||
|
|
names and scores. The read function is disabled because when it read the data
|
|||
|
|
from the disk it woud crash because those aren't the names and scores.
|
|||
|
|
|
|||
|
|
=-----------------------------------------------------------------------------=
|
|||
|
|
_________________
|
|||
|
|
| |
|
|||
|
|
| Happy Cracking! |
|
|||
|
|
| High Technology |
|
|||
|
|
| The Apple Mafia |
|
|||
|
|
|_________________|
|
|||
|
|
|
|||
|
|
|
|||
|
|
- End of File -
|
|||
|
|
|