Category : Unprotects for Games and Such
Archive   : UNPROT2.ZIP
Filename : SDKIK.UNP

 
Output of file : SDKIK.UNP contained in archive : UNPROT2.ZIP
This procedure will unprotect the version 1.10A of SIDEKICK.

Many thanks to the individual who provided the procedure
for the version 1.00A.

The only major difference between the two versions is the offset
address of the instructions to be modified.

Using DEBUG on SK.COM, NOP out the CALL 8C1E at location 07CA ----+
|
Change the OR AL,AL at 07D9 to OR AL,01 --------+ |
| |
......and that's it! | |
| |
(BEFORE ZAP) | |
78A7:07CA E85184 CALL 8C1E <----------------------------+
78A7:07CD 2E CS: | |
78A7:07CE 8E163E02 MOV SS,[023E] | |
78A7:07D2 2E CS: | |
78A7:07D3 8B264002 MOV SP,[0240] | |
78A7:07D7 1F POP DS | |
78A7:07D8 59 POP CX | |
78A7:07D9 0AC0 OR AL,AL <----------+ |
| |
(AFTER ZAP) | |
78A7:07CA 90 NOP <-----------------------------+
78A7:07CB 90 NOP <-----------------------------+
78A7:07CC 90 NOP <-----------------------------+
78A7:07CD 2E CS: |
78A7:07CE 8E163E02 MOV SS,[023E] |
78A7:07D2 2E CS: |
78A7:07D3 8B264002 MOV SP,[0240] |
78A7:07D7 1F POP DS |
78A7:07D8 59 POP CX |
78A7:07D9 0C01 OR AL,01 <----------+
59 POP CX |
78A7:07D9 0C01 OR AL,01 <----------+


  3 Responses to “Category : Unprotects for Games and Such
Archive   : UNPROT2.ZIP
Filename : SDKIK.UNP

  1. Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!

  2. This is so awesome! 😀 I’d be cool if you could download an entire archive of this at once, though.

  3. But one thing that puzzles me is the “mtswslnkmcjklsdlsbdmMICROSOFT” string. There is an article about it here. It is definitely worth a read: http://www.os2museum.com/wp/mtswslnk/