2 button joystick ?

Howdy ! Was there any attempt to make controllers with more than 1 fire button ? I mean as separate control input. First you would need a way to use it on Atari. I think it would be possible to use paddle hardware for detection (and it would actually allow for 3 separate fire buttons). The you need software which supports it, but modifying existing games (where it makes sense) would be simple. I'm actually working on a game where 2 buttons would be nice. And then you would need t

Here's an alternative two-button version of Spelunker (yes, I'm a little obsessed with this game). I tweaked the controls a bit, inspired by the better-feeling three-button version: now the second button doesn't do anything unless the joystick is pushed left, right, up, or down; left and right will turn you in the appropriate direction before starting the fan. More importantly though, I've removed all obfuscation from the loader. Now the boot sector is read to $4000 (init at $4008),