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.