Norton track mod
                     ----------------
     Although DOS only utilizes 40 tracks (0-39) of a disk,
Tandon floppy disk drives are capable of accessing 43 (0-42)
tracks.  Some copy protection schemes take advantage of this
fact, and expect to see certain data beyond track 39.


     You can take a look at (& modify) any standard format data
on these tracks by applying the following patches to Norton's
Disklook & Secmod utilites.  I found these patch areas in version
2.01, but I suspect that the corresponding areas can be readily
found in other versions by searching for similar byte sequences.


     There are two code patches to make in both DL.COM & SM.COM.
In all cases, the instruction of interest takes the form:

     CMP WORD PTR [xxyy],+28

which has the opcode: 83 3E yy xx 28

xxyy is the same for both patch areas in DL.COM, and the same for
both patch areas in SM.COM, but will be different between SM & DL.
     In all cases, the patch to make is to change the '28' (hex
for 40) to a '2B' (hex for 43).

     For version 2.01, the actual DEBUG commands are:

     For DL.COM: E AE2 2B
                 E 3966 2B
     For SM.COM: E 512 2B
                 E 3161 2B

     To change the warning prompt in the sector selection menu to
reflect the new legal track number range: (in ver. 2.01)

     For DL.COM: E 7891 '42'
     For SM.COM: E 4A0E '42'


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Also, the DOS 2.0 DISKCOPY utility can be made to copy out to
track 42.  The patches are:

     E 211 2B
     E 355 2B
     E 35C 2B