fabiensanglard/Prince-of-Persia-Apple-II — pull request #2 by tkchia (2013-10-07 17:30:05+00:00)
Title: YELLOW, PURPLE... and RED HERRING.

- Added some analysis of the YELLOW copy protection check proper (`YELLOW.MAIN.S`).
- Commented on the routine for unscrambling the PURPLE protection check (`PURPLE.S` -> `PURPLE.MAIN.S`).
- Added a brief note on the "red herring" protection check implemented in `POPBOOT0.S`.