💾 Archived View for mirrors.apple2.org.za › active › ftp.apple.asimov.net › images › games › sports … captured on 2024-08-19 at 06:13:33.
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NAME: World Games
PUBLISHER: Epyx
TYPE: Action/Sport Simulation
Cracked from an original by DataWiz/6502 Crew
TECH NOTES:
World Games uses standard DOS 3.3 Address and Data Header bytes
(D5 AA 96 and D5 AA AD respectively), but uses Epilog bytes of
FF FF for Data and Address instead of DE AA. This renders the
disk uncopyable by normal conventions. To transfer the disk to
a normal DOS 3.3 format, boot up the DOS 3.3 system master disk,
and enter to following from the applesoft prompt:
CALL -151
B942: 18
<CONTROL-C>
This patch will cause dos 3.3 to ignore any I/O errors when we copy
(in this case, the non-standard epilog bytes). Now RUN COPYA and
copy the 4 sides of the game.
The secondary protection is a nibble check on track 0, sector E.
NOPing out the code leaves you a cracked copy. Unfortunately,
I lost my notes, so i can't direct you to the exact patch.
The actual RWTS on the game never checks for the epilog bytes of FF FF,
so there was no need to modify that part of the program to look for
standard ones.
As a side note, World Games runs under a slightly modified version
of ProDOS, but all the disks use the same volume name. Although
I haven't checked, I suspect this game can be copied onto a hard
drive and played there.
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If you encounter any other apparent protection,
please contact me at datawiz@magpage.com
If you have original apple software that has not yet been
converted to .DSK image format, please contact me.