Atari 7800 emulator Project Page
Currently, I am only releasing the source code to my Atari 7800 emulator so I can get help from anyone who would like to make suggestions on my code.
Here is a link to the Quantum7800 Atari 7800 emulator source code (v0.01a)
Here are the Atari 7800 docs I have:
Atari 7800 Memory
Map
Atari 7800 Video information
General Atari 7800 information
Maria specifications (pdf)