What I would call “crucial” minimum requirements anyway…
2x “BankStick” chip: the 24LC512… this lets you store patchesone for the default preset patches, one for your own creations.
2x Cores: if you want to use two SID modules with MB-SID v1, you need two Cores in a Master-Slave configuration.
1x “2x20 character LCD or PLED”: if you’re buying a DIN and DOUT module, I guess you’re planning a “step B” control surface. Upgrade to a 2x40 character display for 10 parameters shown at once!
1x rotary encoder, buttons, LEDs.
The most important thing is that I can use the sid midibox through midi parameters with my pc.
… but this is painful, trust me. Good enough to test your SID before you finish a control surface, but no fun in the long term.