just after some opinions/advice on my new sid build.
i currently have a v1 midibox sid which i built a few years ago. it has the minimal control surface. 1 core, 1 sid (6581), 1 din and a (now broken) LCD.
all the pcbs are the original revisions from mike’s.
i’ve aquired an extra 3 sid chips, so i now have 4 (1x6581, 1x8580, and 2x6582). i would like to upgrade to v2 and build a full control surface whilst leaving myself the option of adding extra sids later (when i can afford them).
so my question is this: what can i reuse?
i gather i’ll need 2 cores and 4 sids, and that v2 uses a new pic on the core. but can i reuse my current boards.
or will i be saving myself a whole load of hassle by just ordering a full set of new boards?
You can reuse all the boards, you’ll have to make some minor changes to them though (add a resistor here, add a diode there, …).
There’s a slight problem in your setup concept though. The way you want to set the thing up (2CORES->4SID) it’s not recommended to mix different SIDs in a stereo pair, which you’d have to do (6581 + 8580) as the filters sound differently, some combined waveforms don’t work and so on. There’s a thread partially about that here
so i’ll look at the schematics and figure out which bits i need to change then get going with it.
and i’m right in thinking i can just bung an 18F4685 in my old core, change a few bits, and it’ll work? (after programming the bootloader, etc. of course)
i didn’t realise mixing the chips would cause problems, cheers for the heads-up. i think i’ll just live with it for now, then when i get round to adding more sids i’ll keep them in pairs.
i’m going to start gathering parts this weekend so i’ll let you know how it goes!
