Shouldn't that have already been do-able? I know the The MOnSter 6502 is a thing. The 386 I have no idea about though, that's to far out of my wheel house.
replyA replica 386 would be impractically large - it's got around 275k transistors, compared to the 3.5k in the 6502. At the same scale as the MOnSter 6502, that'd be about a hundred square feet of PCB.
replyThe number of layers isn't even remotely close to being a constraint. The real i386DX was manufactured on a process which only supported two metal layers, and a PCB version isn't subject to the same constraints as silicon.
But in terms of rearranging the stack vertically; is that a possibility?
replyComponents like transistors usually have to go on the surface of a PCB. (While there are techniques for embedding components in a PCB, they're extraordinarily expensive and would not be feasible for a project like this one.)
replyInteresting, thanks for the info.
replyThe layers still need something to link together. You could try a board with as many MSPM0C1104 as you can fit on each side. I'm sure you could use the layers to make some esoteric interconnection map.
replyA dsbga-28 MSPM0G1106 might be better for using up the layers. 4.2mm^2 still so maybe 24 per square cm.
Wouldn't that be MiSTer where you have a single chip emulate a whole system?
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