[sdiy] TI 76477 Space Invaders sound chip detailed analysis

Crys crystals at sonic.net
Tue May 29 02:00:31 CEST 2018

I made a few modules with these. I put FETs all over them to make 
everything voltage controllable, along the lines of Thomas Henry's 
"supercontroller." Eventually i decided that making separate LFOs, AR 
enevelopes, and noise generators (and random voltage sources) was a 
better way of doing it. Iprobably still have a few of the pcbs somewhere.

On 5/27/2018 4:47 PM, Vilhelm Gustafsson wrote:
> On Wed, May 23, 2018 at 6:22 PM, Eric Brombaugh <ebrombaugh1 at cox.net 
> <mailto:ebrombaugh1 at cox.net>> wrote:
>     Google "Blacet Dark Star Chaos" - pretty sure that Frac Rack
>     module was based on the SN76477.
> Yes it was. It doesn't really say anything about that on Blacet's 
> page, but as you can see:
> Schematic of the original 80s version:
> http://electro-music.com/forum/phpbb-files/dsschorig_202.gif
> Pic of the "2000" reissue sold about 10 yrs ago:
> https://www.flickr.com/photos/bamsyn/2706062910/in/album-72157604058910638/
> /Ville
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