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MYMFIX.DOC
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1985-08-24
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HOW TO UNPROTECT "MANAGING YOUR MONEY(tm)"
WITHOUT PROGRAM MODIFICATIONS
If you wish to run "Managing Your Money" from a hard disk, but are
annoyed by the requirement for having the original disk 1 in drive A,
then read on....
Part of this ARC file is the program "MYMFIX.COM". All you have to
do is to include this program in your "autoexec" file when running
Managing Your Money. For instance, your "autoexec.bat" might look like
this:
DATE
TIME
MYMFIX
MYM
That's all there is to it. MYM will no longer look for the key
disk in drive A.
Unlike another unprotection method for MYM, this one does not in-
volve any program modifications with DEBUG. How then does this scheme
work?
The protection logic for MYM is quite simple. On side 0, track 0B
(hex), sector 5B (hex) of the original disk 1 is a short identification
string. The program looks for this string and, if it can't be found,
you are summarily returned to DOS.
MYMFIX is a resident interrupt handler which screens disk I/O calls.
When a call occurs to the special sector mentioned above, MYMFIX sends
back the required indentification string to MYM. Voila, MYM thinks it
has successfully read the original disk 1 and processing continues
normally!
Note: this program was written for MYM version 1.5. It may not work
with subsequent versions if the protection scheme has been changed.
A request:
If you find this program of value and wish to encourage the
availability of similar programs in the future, then you may wish
to contribute $10 to the author at the address below:
Herbert Sorock
2241 Thornwood Avenue
Wilmette, IL 60091
------------------------------------------------------------------------
"Managing Your Money" is a registered trademark of Micro Education
Corporation of America