hi,
I’m preparing to build Sid-Midibox…
So I bought 3 old C64s and ripped out the sid chips…
But they’re all are labled different…
the first: MOS - 6581 - 1984
the second: MOS - 6581 CBM - 4383
the third: MOS - 6581 R3 - 0686
so of course now I have to know what are the differences and which one has the best sound…
I hope you can help me…
cheers,
Matthias
I’m pretty sure the last 4 #'s are batch numbers… The suffix is probably just die revisions - You may want to wait for a second opinion on this just to be sure tho…
Hi
Out of the 13 SIDS I have demolished I have all sorts of
dates and manufacturers.
I stuffed them one by one into the socket and listened.
Thing is these littles beauties seem to all have a different sound. :o
At the end of the day they all worked ok except for a couple which were no go’s.
Regards
Ian
13 SIDs??!!
well, if mine will not work i’ll request one from you!!!
i’m about to begin my SIDbox project in a few weeks!
I will start a new one when the SID control is launched.
You know I plugged a 8580 in my one by mistake.
Quite different to hear.
Only realised after I unplgged it that it was a 8580. :-[
Lucky I did’nt fry it at 12v. 
I had my kids getting them out the old boards and did’nt check :o
I also saved those long DIL sockets from the keyboard with all the connections ready made. i have cut them down for other projects like the flooboard thingy.
Ian ;D