Hi…
Just managaged to get my mits on two SID chips..! 
1 is the older 6581 and the other, the newer 8580. Can i link these two together to make a dual SIDbox or do they have to be the same model…? I also wanna make a single PCB design…
Cheers…
Hi,
you just only have to take care for the different voltage domains (9V / 12V).
If you create a single PCB for both SIDs and cores, you have to stuff one 7812, one 7809, one 7805:
both cores and both SIDs can be supplied by a 7805
The 6581 additionally by a 7812
The 8580 by a 7809
15V should be ok for all 78xx in this configuration
Best Regards, Thorsten.
Thanks T! 