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- TSRCrack V3.00 Copyright (c) 1994
- by Wong Wing Kin
- All rights reserved.
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- What is TSRCRACK?
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- This is a TSR utility for cracking software protection such as
- password protection. It can also be used to modify the games so that
- they can be much easier finished.
- Why not modify the file directly? It is because the files are
- often compressed and encoded, they cannot be decoded and modified.
- Thus you need a TSR to modify the codes after the files are loaded
- into memory.
- This program can generate a TSR from given information about
- where and how to modify the codes.
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- Input File format:
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- [program <startup program name> ]
- int <which interrupt to hook>
- <conditions>?
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- <conditions> :- if <segreg>:<seg offset>:<offset>:<codes>
- (then <segreg>:<seg offset>:<offset>:<codes>)?
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- <segreg> :- ds | es | cs | ss
- <seg offset> :- signed/unsigned hex numbers (word)
- <offset> :- unsigned hex numbers (word)
- <codes> :- space separated hex numbers (byte)
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- ? means 1 or more occurrences.
- [] mean optional.
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- Example: Crack INDARK password
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- program tatou.com
- int 21
- if cs:0000:25bc = 3b 86 d0 fd 75 28 a0 8e
- then cs:0000:25c0 = eb 1a
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- The above program will hook int 21. Every time int 21 is called,
- it will check the byte sequence at the address CS+0000:25bc
- equal to 3b 86 d0 fd 75 28 a0 8e or not. If it is equal,
- change CS+0000:25c0 to eb 1a.
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- Example: The following program can also be acceptable
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- Program tatou.com
- int 21
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- if Cs:0000:25bc = 3b 86 d0 fd 75 28 a0 8e
- then cs+0:+25c0 = eb 1a
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- if cs-cd6:1f46 = 8b 56 e6 d1 e2 c4 1e 8e 7d 03
- then cs:-cd6:1f46 = 83 7e e6 15 74 8 f7 d8 eb d2
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- if cs:-cd6:1f04 = 26 ff 0f
- then cs:-cd6:1f04 = eb 01
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- How to contact the author?
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- As I am now busy in my studies, I have no time to write a detail
- document. If you find any problems in using this program, you can
- contact the author through e-mail:
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- Internet address:
- cs_wwkin@uxmail.ust.hk
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- Discliamer:
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- TSRCrack is supplied as is. The author disclaims all warranties,
- expressed or implied, including, without limitation, the warranties
- of merchantability and of fitness for any purpose. The author
- assumes no liability for any damages, direct or consequential, which
- may result from the use of, or inability to use TSRCrack.
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