Atari Technical Information

This is a collection of technical documentation and notes I've collected about Atari 8-bit computers. I'm using it to design another emulator, but perhaps other emulator writers will also find the information useful.

This collection will be undergoing major construction for a bit, since I'm just starting to translate my data to HTML. Actually, it may never really be finished. If anybody finds a typo or inaccuracy, please let me know. Also, if you have any useful information that's not covered in these notes, please send me a copy (or the URL where I can find them).

Sally (Atari's 6502 CPU)

• Instruction Descriptions
• Op-Code Table (by instruction)
• Op-Code Table (by opcode)
• Pinout Diagram

ANTIC

• Instruction Set
• Registers
• Pinout Diagram

CTIA / GTIA

• Registers
• Notes on Video Output
• Pinout Diagram

Pokey

• Registers
• Pinout Diagram

PIA (6520A)

• Registers
• Pinout Diagram

• Atari 8-bit Emulator Page
• Processor Emulation Goldmine 6502
• Jellystone Park (archive of Atari 8-bit software)
• Atari Peripheral Emulator

Last updated 7-13-1997