Space Invaders sound circuits

[Alessandro Scotti]

Hi there,
I am trying to emulate in software the sound circuits of Space
Invaders (yep, the old classic game) but unfortunately I have very
little knowledge in electronics, although I'm certainly willing to
study and learn.

I have setup some web pages to explain what I know and get information
on the rest, you can find them at:

http://www.ascotti.org/programming/side/soundboard.htm

I have managed to "solve" the circuits named "step" and "extended
play", and I can simulate "flash" and "noise" (without fully
understanding them) but I'm pretty much stuck on the rest. I would
really appreciate it if you could take a quick look at the circuits
and hopefully give me some tips on how to proceed.

Thanks in advance!

Alessandro Scotti

 

[Wayne]

Hi there,
I am trying to emulate in software the sound circuits of Space
Invaders (yep, the old classic game) but unfortunately I have very
little knowledge in electronics, although I'm certainly willing to
study and learn.

I have setup some web pages to explain what I know and get information
on the rest, you can find them at:

http://www.ascotti.org/programming/side/soundboard.htm

I have managed to "solve" the circuits named "step" and "extended
play", and I can simulate "flash" and "noise" (without fully
understanding them) but I'm pretty much stuck on the rest. I would
really appreciate it if you could take a quick look at the circuits
and hopefully give me some tips on how to proceed.

Thanks in advance!

Alessandro Scotti

Can't help you with the circuit, but a while back I downloaded a full
working version of that particular game for free. Looks sounds and feels
just like the original.

Wayne.

 

[Alessandro Scotti]

Can't help you with the circuit, but a while back I downloaded a full
working version of that particular game for free. Looks sounds and feels
just like the original.

Wayne.

Yep there are several emulators out there (including two of mine) but
they all use pre-recorded sounds that are simply played back at the
proper time. This works really well but I'm trying to get rid of these
samples and get all the emulation in software...