HOW TO UNPROTECT "SpssPc" (tm)
                      WITHOUT PROGRAM MODIFICATIONS

         If you wish to run "SpssPc" (ver. 1.1) from a hard disk, but
     are annoyed by the requirement for having the original disk 1 in
     drive A, then read on....

05/07/86              UNPROTECTING SPSS/PC+


THIS UNPROTECT IS ONLY KNOWN TO WORK WITH THE VERSION OF SPSS/PC+
RELEASED WITH THE FILE "SPSSPCC.COM (or SPSSPC.COM after
installation) OF SIZE 16100 DATED 8-12-85 TIME 6:51p (as reported
by a DIR command).

WHEN YOU APPLY THESE CHANGES, YOU WILL NO LONGER NEED THE KEY DISKETTE.


1. MAKE A COPY OF SPSSPC(C).COM AND PUT AWAY THE ORIGINAL.

USING YOUR COPIED VERSION OF SPSSPC(C).COM:

2. DEBUG SPSSPC(C).COM

3. R --- record the value in the CS register, say XXXX.
         Let ZZZZ = the value in the CX register plus 0100 (hex).

4. D CS:1018
   You should see the following string of bytes:
   C4 5E 1E 26 8A 27 ....
   If you do, proceed to step 6, otherwise,

5. S CS:0100 CS:ZZZZ C4 5E 1E 26 8A 27 If debug returns no address
   where this byte string is found, you have a different version and
   should just type "q" to get out of debug --- this will not work
   for you.  If debug returns more than 1 address where found, you
   could try proceeding with step 5 trying each address
   XXXX:YYYY (ONE AT A TIME!!!).  Can't promise anything, but who
   knows???

6. E XXXX:YYYY (where YYYY is 1018 if you got here from step 4 or
   YYYY is the value you got from step 5).

7. WHEN YOU SEE C4., TYPE A 90 AND A <CR>.

YOU HAVE NOW UNPROTECTED SPSS/PC+ TO THE POINT WHERE IT NO LONGER
NEEDS THE KEY DISKETTE!!!

NOW, TO GET RID OF THOSE ANNOYING WARNINGS ABOUT DUPLICATION AND
COPYRIGHTS:

8. F XXXX:2E6E XXXX:2E91 20

9. F XXXX:3AC6 XXXX:3AE7 20

10. F XXXX:3AFE XXXX:3B21 20

11. F XXXX:3B41 XXXX:3B54 20

12. F XXXX:3B78 XXXX:3BA2 20

13. F XXXX:3BC3 XXXX:3BD4 20

14. F XXXX:3BE3 XXXX:3C20 20

15. F XXXX:3C41 XXXX:3C54 20

16. W

17. Q

THERE YOU GO...REPLACE THE ORIGINAL VERSION (KEEP THE ORIGINAL IN
A SAFE PLACE!!!!) OF SPSSPC(C).COM WITH YOUR NEWLY DEBUGGED
VERSION AND YOU SHOULD NO LONGER NEED THE KEY DISKETTE TO RUN SPSS/PC+.

HAPPY COMPUTING.