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Text File  |  1984-07-09  |  2KB  |  36 lines
  1. This is the procedure for bypassing the copy protection scheme used by 
  2. SIDEKICK,  version 1.00A.
  3.  
  4. Using DEBUG on SK.COM, NOP out the CALL 8780 at location 071A ----+
  5.                                                                   |
  6. Change the OR  AL,AL at 072D to  OR  AL,01 --------+              |
  7.                                                    |              |
  8. ......and that's it!                               |              |
  9.                                                    |              |
  10.                      (BEFORE ZAP)                  |              |
  11. 78A7:071A E86380        CALL    8780 <----------------------------+
  12. 78A7:071D 2E            CS:                        |              |
  13. 78A7:071E 8E163D02      MOV     SS,[023D]          |              |
  14. 78A7:0722 2E            CS:                        |              |
  15. 78A7:0723 8B263F02      MOV     SP,[023F]          |              |
  16. 78A7:0727 1F            POP     DS                 |              |
  17. 78A7:0728 59            POP     CX                 |              |
  18. 78A7:0729 880E1300      MOV     [0013],CL          |              |
  19. 78A7:072D 0AC0          OR      AL,AL   <----------+              |
  20.                                                    |              |
  21.                      (AFTER ZAP)                   |              |
  22. 78A7:071A 90            NOP         <-----------------------------+
  23. 78A7:071B 90            NOP         <-----------------------------+
  24. 78A7:071C 90            NOP         <-----------------------------+
  25. 78A7:071D 2E            CS:                        |
  26. 78A7:071E 8E163D02      MOV     SS,[023D]          |
  27. 78A7:0722 2E            CS:                        |
  28. 78A7:0723 8B263F02      MOV     SP,[023F]          |
  29. 78A7:0727 1F            POP     DS                 |
  30. 78A7:0728 59            POP     CX                 |
  31. 78A7:0729 880E1300      MOV     [0013],CL          |
  32. 78A7:072D 0C01          OR      AL,01   <----------+
  33.  
  34. X                 |
  35. 78A7:0729 880E1300      MOV     [0013],CL          |
  36. 78A7:072D 0C01