Mapping the Atari, written by Ian Chadwick and published by COMPUTE!

Publications in 1983, is an address-by-address explanation of the memory layout of the Atari 8-bit computers.

The introduction is by Optimized Systems Software co-founder Bill Wilkinson.

For example, location 756 (2F4) CHBAS contains the starting memory address that tells ANTIC where to find the character set.

An updated version covering changes to the operating system and newer machines like the 130XE followed in 1985.