57 lines
2.4 KiB
Plaintext
57 lines
2.4 KiB
Plaintext
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3/28/86 Unprotect dBASE Administrator 1.0
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by Perry Simm
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This unprotect should take care of the problem of running multiple copies
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in a network environment. The previous version only allowed a single copy
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to run at one time. The problem arises from a key that is placed at offset
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0F0H in the Program Segment Prefix (PSP). Ashton-Tate's ACCESS.COM program
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provides the key before it loads DBA.LD1. The ACCESS.COM provided with this
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unprotect does the same thing using random numbers to generate the key using
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the system clock as a seed. It then generates the correct checksum word to
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place at PSP:0FEH and calls DBA.LD1 through DOS function 4BH.
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This archive should contain the following files:
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DBA.UNP (this file)
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DBA.BIN (EXE file header for DBA.LD1)
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ACCESS.COM (replaces Ashton-Tate's ACCESS.COM file)
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The following instructions apply only the file DBA.LD1 150016 12-26-85 10:00am.
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Any other file will very likely not work.
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1. Copy DBA.LD1, DBA.BIN (included with this file) and ACCESS.COM (also
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included with this file) to the same disk or directory.
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2. Issue the following DEBUG commands:
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3. DEBUG DBA.LD1
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4. -N DBA.BIN
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5. -L
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6. -N DBA.LD1
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7. -RBX
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8. BX 0000 ;debug response
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9. :2
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10. -RCX
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11. CX 3000 ;debug response
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12. :4A00
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13. -W
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14. -Q
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You will also need to copy the following files from your ADMINISTRATOR disks:
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ASSIST.HLP, DBA.OVL, DBASE.MSG, HELP.DBS, INSTALLM.EXE
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Once you have these files together on disk or in a directory, run INSTALLM one
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time. Then you can delete it. You now have a working copy of dBASE III Plus
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Administrator. There is no need to run the install procedure. Use the new
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ACCESS.COM as you would as described in your Getting Started manual.
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If you have any questions or problems with this unprotect, please contact
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me on the Atlanta IBM-PCUG BBS at (404) 433-0062.
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Perry Simm
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P.S. Please note that if you specify a program file on the command line,
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you must not use a program name that begins with the letter M. This
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is true of the original protected version as well and is not a byproduct
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of unprotection.
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Ex. ACCESS master M=d:path
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Yields the message: Unauthorized Duplicate
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