RoboJ1M
Posts: 14
Joined: Wed Mar 28, 2012 8:20 am
Contact: Website

Could you interface a Pi with an MOS 6581 SID chip?

Wed Aug 22, 2012 9:50 am

I finally had an idea, something to do with my Pi that isn't just using it as a computer.

http://en.wikipedia.org/wiki/MOS_Technology_SID

Would it be possible to control a SID chip from the GPIO connector?

Thoughts?

Ta,

J.

vmp32k
Posts: 14
Joined: Fri Jul 27, 2012 3:05 pm

Re: Could you interface a Pi with an MOS 6581 SID chip?

Wed Aug 22, 2012 10:17 am

It's quite possible, I found someone through google who made a SID interface through the PC's parallel port: http://www.loper-os.org/vintage/paralle ... rasid.html

RoboJ1M
Posts: 14
Joined: Wed Mar 28, 2012 8:20 am
Contact: Website

Re: Could you interface a Pi with an MOS 6581 SID chip?

Wed Aug 22, 2012 2:19 pm

ooooh.... :shock:

And I read that the GPIO can be instructed to act as a parallel port so that's uber-cool.
I guess you could even read back the values from the analogue pots.
And I wonder what you could do with the audio in pin.

Shame they don't make the chips any more. Will have to find a C64 to cannibalize.

J.

Serac
Posts: 124
Joined: Wed Jul 18, 2012 2:49 pm

Re: Could you interface a Pi with an MOS 6581 SID chip?

Wed Aug 22, 2012 4:00 pm

RoboJ1M wrote:Would it be possible to control a SID chip from the GPIO connector?
Yes, quite possible, but... The gpio is 3.3V maximum and current limited, so to be on the safe side you would be advised to use some 3.3V->5V level shifters and make absolutely sure that no 5V signals from the SID chip are fed directly back in to the gpio. Once that task is complete, you'd then need to write some code..

RoboJ1M
Posts: 14
Joined: Wed Mar 28, 2012 8:20 am
Contact: Website

Re: Could you interface a Pi with an MOS 6581 SID chip?

Wed Aug 22, 2012 4:06 pm

Serac wrote: Once that task is complete, you'd then need to write some code..
mmmmmm delicious code. :P

Code I can do.

Well, everything but C# is rusty as hell but I'm sure I can sort that bit.
Vala is my latest toy anyway so I'm sure that will work.

Ta,

J.

papawattu
Posts: 12
Joined: Fri Nov 29, 2013 12:11 am

Re: Could you interface a Pi with an MOS 6581 SID chip?

Fri Nov 29, 2013 12:18 am

I've done it eventually

Killed a few Pi's and Sid's along the way but it was worth it in the end

https://www.facebook.com/photo.php?fbid ... =1&theater

I've written a driver for ACID and a proxy device to forward network traffic to the Pi. Needs a couple of performance tweaks to get it 1--% but I'm trying in the spare time I have.

code is here https://github.com/papawattu/SidPi

Will share more details when I can.

Jamie.


User avatar
redhawk
Posts: 3465
Joined: Sun Mar 04, 2012 2:13 pm
Location: ::1

Re: Could you interface a Pi with an MOS 6581 SID chip?

Thu Apr 24, 2014 7:17 pm

http://en.wikipedia.org/wiki/HardSID is one possibility although apparently no one was interested in developing a USB Linux driver.
The reSID software engine is pretty good as an alternative but you can't beat the real McCoy. :)

Richard S.


Return to “Graphics, sound and multimedia”