[sdiy] MIDI with chips

[Neil Johnson]

Hi,

> Unless I'm thinking of the wrong part, the M108 was made by SGS and
> used in organs and stuff.  Found a datasheet:
>
> http://www.milton.arachsys.com/nj71/pdf/m108.pdf
>
> Probably not easy to come by unless someone's stocking spares for
> crappy Italian home organs and whatnot.

Yep, those are the ones - there are some other related datasheets on  
the same page:

http://www.milton.arachsys.com/nj71/index.php?menu=2&submenu=5

One source for these chips is to buy old organs off eBay and strip  
them out.  Considering how little they go for it would be far cheaper  
than trying to source NOS.  Only downside is they come with a hundred- 
weight of woodwork and plastic.

Cheers,
Neil
--
http://www.njohnson.co.uk