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UNPROT2.LZH
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WORD.UNP
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1983-12-27
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3KB
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75 lines
UNPROTECTING MICROSOFT 'WORD' FOR BACKUPS AND HARD DISKS
--------------------------------------------------------
[Updated 21 Dec 83 - Now works for copy to hard disk]
The protection scheme for MS word is quite good. The last track is
formatted with 256 byte sectors. One sector, however, has an ID that says
it is a 1K sector. If you try to read it as a 256 byte sector, you'll get a
sector not found. You can read it as a 1K sector with a guaranteed CRC
error, and you will get the data and other sector overhead from 3+ sectors.
They read it as 1K, and use the bytes after the first 256 for decryption.
These bytes constitute the post-amble of the sector, the inter-sector gap,
and the preamble to the next 256 byte sector. If it's not formatted with
the correct inter-sector gap, the decryption key is different and the
incorrectly decoded program bombs.
The best way around this is to modify the MWCOPY program so it will let you
make more than one copy. The below mods will let you make as many backups
as you want (and you can leave the write protect tab on your master disk).
Of course, this method should only be used by registered owners of Word. If
you, or any of your IMF force is killed, the secretary will disavow any
knowledge of these patches.
We will copy MWCOPY to another disk, using another name (MWCP) so you'll
know it's the special version, and then modify MWCP.
(with master disk in A:, B: has any disk with debug on it)
A>copy mwcopy.com b:mwcp.com
A>b:
B>debug mwcp.com
-e103
xxxx:0103 0x.00
-e148
xxxx:0148 A5.a7
-e194
xxxx:0194 02.04
-e32a
xxxx:032A 1C.1e
-e32e
xxxx:032E 1C.1e
-e3372
xxxx:3372 01.03
-ecfe
xxxx:0CFE CD.90<space>26.90<space>
xxxx:0D00 5B.90
-e4ab
xxxx:04AB 1B.84
-e69a
xxxx:069A C1.b9<space>38.ff<space>28.b9
-e7b3
xxxx:07B3 A2.5f<space>08.e9
-e66f
xxxx:066F E5.d8<space>
xxxx:0670 94.29<space>90.ff<space>29.b9
-e3375 [this is the additional
xxxx:3375 48.4a mod needed for copy to hdisk]
-w
Writing 332D bytes
-q
B>mwcp (try making a copy..remember,
leave the write-protect on the master)
(Just follow the prompts in the program, except when they ask
you to remove the write protect tab)
The original version of this file did not have the mod at 3375, and the copy
to hdisk would bomb. With the help of a friend who told me it wouldnt copy
to his hdisk, I found the cause. The above procedure will work for backup
to floppy or hard disk. Another way to unprotect Word gets rid of the need
for any weird disk formats. But it is MUCH more complicated to do. Enjoy!
Dave Alverson CompuServe 72155,1560