To detect a dodgy copy, the game bypasses the BIOS and talks directly to the floppy disk controller using some custom code. The first part of the code uses the standard INT 13h routine to seek to ...

Invented by Alan Shugart at IBM in 1967, the original floppy disk design measured 8 inches (200mm) in diameter, stored 80KB of data and became available for purchase in 1971 as a part of IBM's ...

The BASIC source code and images for the game were stored on a single ProDOS formatted, soft-sectored 5.25″ floppy ... on the disk, and having some bits and pieces of the original volume listing ...