atari2600

An emulator for the Atari 2600.

The goal of this is to be able to play a couple of key games that have sentimental value to me, rather than attempting to be a highly accurate emulator that can play the vast library of games available. For that, there's Stella.

TODO

This is still in progress. It can play games, but it's still got problems.

1. Docs (this is great)
2. 6507 CPU (rip out the interrupts from my 6502)
3. Basic memory map (13-bit address bus, RAM, and cartridge ROM)
4. SDL integration
5. Basic TIA frame timing
6. Playfield rendering
7. Missle graphics
8. Ball graphics
9. Player graphics
10. Horizontal positioning and HMOVE
11. Graphics delay on LRHB
12. Vertical delay
13. Collision flags
14. Fix frame timing
15. RIOT chip (MOS 6532) for peripherals
16. Fix small horizontal position bugs
17. Audio (see this)
18. ..
19. Adventure time!

Building and Runnning

$ brew install sdl2
$ cargo build --release
$ target/release/atari2600 roms/Pitfall.a26

Console Buttons

Console Switch	Keyboard Button
Game Select	F1
Game Reset	F2
Color Toggle	F3

Joystick 0 Keys

Joystick Button	Keyboard Button
Up	W
Left	A
Down	S
Right	D
Fire	N

References

These projects helped me understand a lot when the docs weren't clear enough.

• ruby2600
• Gopher2600