MSG LEFT BY: GREGG BURMAN
DATE POSTED: WED JUL 27  1:24:47 AM

U.S. CONSTITUTION TUTOR, AND SAT
ENGLISH #1 AND PRETTY OLD NOW, BUT
I JUST RECENTLY GOT HOLD OF ORIGINALS,
AND THOUGHT I WOULD PASS THIS INFO
ALONG.
 
MICRO LAB USES A MODIFIED DOS FOR
PROTECTION LIKE SO MANY OTHERS WE
HAVE SEEN IN THE PAST. FROM THE START
IT LOOKS LIKE A STANDARD DEMUFFIN TYPE
CRACK, ALTHOUGH WHEN YOU TRY IT THE
DRIVE COMES ON, AND YOU SEE:
 
            I/O ERROR
 
HMMM...
 
WELL MICRO LAB USES INDIRECT COMPARES
WITH ZERO PAGE LOCATIONS IN THEIR RWTS
ROUTINE (I.E. CMP $D6) RATHER THAN THE
STANDARD CMP #$D5. THE PROBLEM WITH
THIS IS THAT SOME OF THESE LOCATIONS
ARE CHANGED WHEN WE RESET OUT OF THE
PROGRAM, OR LIKE BYTE $D6, THE APPLE-
SOFT RUN FLAG, IT IS OFTEN CHANGED