[sdiy] TI 76477 Space Invaders sound chip detailed analysis

[MTG]

Luxury! I used to dream about programming a 6809!

6809 is actually my fave CPU of all time.  There's a fantastic Byte 
article about it.

At the moment I'm staring at some 6800 (actually 6303) code.  A:B and X. 
  That's it.  Ugh.  I'd kill for a Y register or real addressing modes.


On 5/24/2018 8:12 PM, Crys wrote:
> Haha,
> 
> This talk about the SN76477 brought back some great memories for me, too.
>   My first "rhythm generator", also a breadboard but with a small 
> aluminum control panel with switches and knobs. We actually used it in a 
> few jams. This was 1983 or so. Eventually i hooked up a RS color 
> computer to it and programmed the killer 6809E cpu in assembly code. I 
> must have burned at least 800 doobies debugging that one. As for a 
> digital emulation of the SN76477, huh, what?!
> 
>   The sound generator chip is enough fond memory but that old issue of 
> Byte magazine had me falling over with laughter. 64 whopping kilobytes 
> of RAM (on a card no less.)
> 
> happy synthesizing,
> crystal
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