> On Jul 29, 2016, at 5:06 AM, Anders Carlsson <firstname.lastname@example.org> wrote: > > silverdr wrote: > >>> Yeah, having their own fab was a huge business advantage for Commodore back then! >> How did f.e. Atari build their POKEYs and Co. then? > > As far as I can tell, the POKEY was manufactured by AMI (American Megatrends?) on behalf of Atari. If that is correct, more manufacturers may have taken the same route, to design a custom chip and then have another company manufacture it for them. Probably more expensive than Commodore owning MOS/CSG so they could use "vertical integration" and sell chips to themselves at cost instead of profit. I’m sure Jay used the same techniques that he used to design the Amiga chipset — prototype using a large board of discrete logic, then have CAD (or hand artist) create mask for the schematic. The manufacturer would provide the design rules you’d need to adhere to for their process and maybe some hands-on support. -Nate Message was sent through the cbm-hackers mailing listReceived on 2016-08-01 00:00:07
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