Mapping the Atari
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|Subject||Atari 8-bit family|
|LC Class||QA76.8.A82 C424 1985|
Mapping the Atari, written by Ian Chadwick in 1983, is a location-by-location explanation of the Atari 8-bit family's memory map. It was one of the "must have" references for programming the platform, although it was published somewhat late in the machine's timeline. An updated version covering changes to the operating system and newer machines like the 130XE followed in 1985.
The book contained not only the memory map, but often included details of how to use them as well. For instance, location 756 (2F4)
CHBAS contained the starting memory address that told the ANTIC where to find the character set. The book goes into several pages of detail on how to use this feature to build custom character sets. One "problem" with the book was that the memory locations controlling a particular feature, character sets for instance, would be spread out over many pages of the text, each with their own little snippets of code.