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UNPROT2.LZH
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MULTILNK.UNP
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1985-05-25
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2KB
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56 lines
The new version of Multi-Link has been copy protected by a very
simple, but effective, method.
A normal DOS diskette is formatted for 40 tracks, but most diskette drives
can reach out to track 42 ! Now track 41 on the Multi-Link diskette is not
formatted at all, but the 42 track has been formatted and contains data.
In sectors 3 and 8 of track 42 the ASCII numbers 59 are in the first 2 bytes,
and the rest of both sectors are spaces, or hex"20".
In order to copy the diskette and run mlink.com sucessfully, track 42 must
also be copied. I have modified the DOS 2.0 version of diskcopy.com so
that 42 tracks will be copied.
To make your new version of DISKCOPY.COM, place DEBUG.COM and DISKCOPY.COM on
a blank disk in the default drive, and type do the following EXACTLY as shown !
This patch is for DOS 2.xx Version of DISKCOPY.COM.
0. DEBUG <enter>
1. N DISKCOPY.COM <enter>
2. L <enter>
3. E 211 2A <enter>
4. E 355 2A <enter>
5. E 35C 2A <enter>
6. N CPYMLINK.COM <enter>
7. W <enter>
8. Q <enter>
9.CPYMLINK A: B: <enter>
<place the Distribution copy of Mulit-Link in A: drive and a scratch in B:>
<then enter>
10. that is it !!!
If you have never used the io-redirection features of DOS 2.0 here is your
chance. Put the following lines in a seperate file called FIXDSKCP.ARF.
And issue the command "DEBUG <FIXDSKCP.ARF ".
YOU MUST HAVE DEBUG.>COM, DISKCOPY.COM, AND FIXDSKCP.ARF IN THE DEFAULT DRIVE!!
*************************do not include this line********
N DISKCOPY.COM
L
E 211 2A
E 355 2A
E 35C 2A
N CPYMLINK.COM
W
Q
*************************don not include this line*******
Now do step 10 above.
Since the Multi-Link diskette is single-sided and you may
wish to use double sided drives, simply copy the Multi-Link
diskette with your new version of diskcopy.com, then FORMAT the diskette
double-sided ! Since FORMAT.COM only formats 40 tracks, track 42 isn't
damaged. Now, with the origional Multi-Link diskette in A: and
the diskcopied-then-formatted diskette in B:, do a "COPY A:*.* B:"
Mark A. Sehorne...et al