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Author Topic: I'm making a new C= Machine.  (Read 2360 times)

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Offline Rob

Re: I'm making a new C= Machine.
« on: December 08, 2016, 09:09:50 PM »
Quote from: bbond007;817465
It's a shame the shipping excessive. The case is really nice at a very reasonable price. It even included some custom stickers.

I like C= 16 KB has distinct cursor keys unlike the C= 64 KB.

I forgot about the manual shift-lock. I like that too...



I'll probably run RetroPie image and use it more for the emulation of other things as well as Kodi player.

 

hopefully you'll have a working "/proc/devices/sidpi" and this result:

https://www.youtube.com/watch?v=plyVYZ6XPwQ

This is probably the biggest challenge for the entire project because the SidPI is based around the 6581 SID and I have the newer 8580 chip...

The main differences of the two SID chip types:
SID 6581 needs 12 V DC voltage and two 470 pF filter capacitors
SID 8580 needs 9 V DC voltage and two 2,2 nF filter capacitors
(http://personal.inet.fi/musiikki/jtpartanen/commodorestuff/6581to8580/index.html)

I'll probably have to have ask someone that knows more about SID chips help me out...

form example this confuses me, the schematic here -->https://raw.githubusercontent.com/papawattu/SidPi/master/schematic/sidpi.png shows the filters already as 2,2 nF which I would think would be correct for the 8580 but the documentation suggests he is using a 6581.


It might be worth contacting Colin Piggott.  He makes a SID interface for the Sam CoupĂ© and can tailor it for either a 6581 or an 8580 so he'll definitely know which value caps you need for which version.

http://www.samcoupe.com/contact.htm