Category : Unprotects for Games and Such
Archive   : UNPROT2.ZIP
Filename : MYABCS.TXT

 
Output of file : MYABCS.TXT contained in archive : UNPROT2.ZIP
Unprotect for "My ABC's"
by
Paperback Software

11 May, 1986


This short debug session will unprotect My ABC's so that it may be
be freely backed up. The program is a cute alphabet and counting tutor
for pre-schoolers and is very reasonably priced at $10.00. I highly rec-
ommend its purchase. However the turkeys copy protected it with non-stan-
dard formatting and disk checking. Unfortunately that meant I couldn't
use it for my kids, as my drive A isn't a 5.25 inch drive. Furthermore,
if there was ever a disk that was going to be at high risk for damage,
it's the one you give a pre-schooler. Out of necessity, then, (not
cheapness!) this unprotect was born.

Make a diskcopy copy of the ABC's disk and put away the original.
Copy Debug.com onto the non-functioning copy diskette. Now enter:

A> REN ABC.EXE ABC.ZAP

A> DEBUG ABC.ZAP

-E 03AF

XXXX:03AF 75.90
XXXX:03B0 03.90

-W
Writing A2CD bytes

-Q

A>REN ABC.ZAP ABC.EXE

NOTES: 1. = PRESS THE RETURN KEY ONCE.
2. = PRESS THE SPACE BAR ONCE.
3. THE DEBUG PROMPT IS THE "-".
4. DEBUG WILL DISPLAY THE 75 AND THE 03, YOU ENTER THE
90'S.
5. IF DEBUG DOESN'T DISPLAY THE 75 AND 03, THIS PROBABLY
WON'T WORK.
6. XXXX is a 4 digit hex number which varies from
computer to computer. Ignore these values.

When you are through with the above, you have a copiable, func-
tioning version of ABC.EXE. Backups may now be made with the copy *.*
command.

For the technically inclined:

What you are doing is entering 2 NOP's which overwrite a condi-
tional jump to an exit routine. This means that when the INT 13 returns
from the disk check with the news that the disk is a copy, the program
ignores it and continues.

If this is of any use to you or if you have comments/criticism,
the author of this unprotect may be reached via TELSTAR BBS, San Antonio
TX (512) 822-8882. Leave a message to ALL and mention ABC.UNP. Again,
I recommend purchasing the program if at all possible, as it is worth
the very reasonable price requested.
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  3 Responses to “Category : Unprotects for Games and Such
Archive   : UNPROT2.ZIP
Filename : MYABCS.TXT

  1. Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!

  2. This is so awesome! 😀 I’d be cool if you could download an entire archive of this at once, though.

  3. But one thing that puzzles me is the “mtswslnkmcjklsdlsbdmMICROSOFT” string. There is an article about it here. It is definitely worth a read: http://www.os2museum.com/wp/mtswslnk/