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- Unprotect for Test Drive 1.10:
-
- Copy the original disk using COPY or DISKCOPY.
-
- RENAME TDCGA.EXE TDCGA.XXX
-
- DEBUG TDCGA.XXX
-
- -U 7185
-
- 3666:7185 55 PUSH BP
- 3666:7186 56 PUSH SI
- 3666:7187 57 PUSH DI
- 3666:7188 06 PUSH ES
- 3666:7189 1E PUSH DS
- 3666:718A 8BF4 MOV SI,SP
- 3666:718C 0E PUSH CS
- 3666:718D 0E PUSH CS
- 3666:718E 33C0 XOR AX,AX
- 3666:7190 8ED8 MOV DS,AX
- 3666:7192 89361000 MOV [0010],SI
- 3666:7196 C70612000102 MOV WORD PTR [0012],0201
- 3666:719C 1F POP DS
- 3666:719D 07 POP ES
- 3666:719E B013 MOV AL,13
- 3666:71A0 A2A076 MOV [76A0],AL
- 3666:71A3 A2E477 MOV [77E4],AL
-
- This is the beginning of the subroutine that checks the copy protection.
-
- To bypass it:
-
- -A 7185
- XOR AX,AX
- RET
- {And press ENTER to get back to the debug prompt.}
-
- -W {Write the program back to disk.}
-
- -Q {Return to DOS.}
-
- RENAME TDCGA.XXX TDCGA.EXE
-
- -----------------------------------------------------------------------
- The unprotect is the same for the EGA file (TDEGA.EXE) except that the
- protection subroutine begins at 88ED. Just substitute 88ED for 7185
- in the instructions above.
- -----------------------------------------------------------------------
-
- Test Drive should now run as usual except no key disk or special install
- will be required.
-
- The executable files on the Test Drive disk are:
- TD.EXE
- TDH.EXE
- TDCGA.EXE
- TDEGA.EXE
- TD.EXE and TDH.EXE are not copy protected. If you run Test Drive from
- a hard disk you should use TDH.EXE.
-
-
- ------------------------------------------------------------------- Also
-
- Unprotect for Test Drive (IBM PC)
- *** EGA VERSION ***
-
- BE SURE TO BACKUP YOUR TEST DRIVE DISK BEFORE STARTING AND USE THE
- BACK UP FOR THE UNPROTECT. THIS WAY IF SOMETHING GOES WRONG YOU
- WON'T BE OUT A GAME..........
-
- First you should rename the file tdega.exe to tdega
-
- C>rename tdega.exe tdega
-
- Next Load tdega into debug...
-
- C>debug tdega
-
- Then Follow the sample debug session:
-
- -e 88ED : Edit the contents of address 88ED
-
- XXXX:88ED 55. : Should appear
- : If 55 does not appear.. press enter and
- : quit immediately. This unprotect is not
- : for your version of Test Drive.
-
- Now type "31" then press the SPACE bar.
-
- XXXX:88ED 55.31 56. : Should appear
- : If 56 does not appear.. press enter and
- : quit immediately.
-
- Now type "C0" then press the SPACE bar.
-
-
- XXXX:88ED 55.31 56.C0 : Should appear
- XXXX:88ED 57. : If 57 does not appear.. press enter and
- : quit immediately.
-
- Now type "C3" then press the ENTER key.
-
- Now write the new tdega game back to the disk:
-
- -w <Enter>
-
- Writing XXXX bytes
-
- Then Quit Debug:
-
- -q <Enter>
-
- Now it is time to rename tdega back to tdega.exe
-
- C>ren tdega tdega.exe
-
- Now try to run the new (Hopefully) unprotected version Of Test Drive
-
- C>tdega
-
-
-
- ------------------------------------------------------------------- Also
-
- Unprotect for Test Drive (IBM PC)
-
-
- BE SURE TO BACKUP YOUR TEST DRIVE DISK BEFORE STARTING AND USE THE
- BACK UP FOR THE UNPROTECT. THIS WAY IF SOMETHING GOES WRONG THEN YOU
- ARE NOT OUT A GAME..........
-
- First you should rename the file tdcga.exe to tdcga
-
- C>rename tdcga.exe tdcga
-
- Next Load tdcga into debug...
-
- C>debug tdcga
-
- Then Follow the sample debug session:
-
- -e 70D6 : Edit the contents of address 70D6
-
- XXXX:70D6 55. : Should appear
- : If 55 does not appear.. press enter and
- : quit immediately. This unprotect is not
- : for your version of Test Drive.
-
- Now type "31" then press the SPACE bar.
-
- XXXX:70D6 55.31 56. : Should appear
- : If 56 does not appear.. press enter and
- : quit immediately.
-
- Now type "C0" then press the SPACE bar.
-
-
- XXXX:70D6 55.31 56.C0 : Should appear
- XXXX:70D8 57. : If 57 does not appear.. press enter and
- : quit immediately.
-
- Now type "C3" then press the ENTER key.
-
- Now write the new tdcga game back to the disk:
-
- -w <Enter>
-
- Writing XXXX bytes
-
- Then Quit Debug:
-
- -q <Enter>
-
- Now it is time to rename tdcga back to tdcga.exe
-
- C>ren tdcga tdcga.exe
-
- Now try to run the new (Hopefully) unprotected version Of Test Drive
-
- C>tdcga
-
- --------------------------------------------------------------------------
-
- Unprotect Brought to you courtesy of JACKLE
-
-
- Jackle can be reached at:
-
- Bullesye BBS Stockton, Ca - Fido 161/31
- (209) 474-3436
- (209) 474-FIDO
-
- Have PHUN......
-
- ------------------------------------------------------------------- Also
-
- See UNPCC89.DOC for other ideas.
-