The RAMs and ROMs would be fairly trivial to figure out, as well.
You might not learn the manufacturing process -- that really did take a couple decades of material science and physics advances. But the principles of the machine would be clear. And then you could take the knowledge of that and scale it to the electronics components available in the era. You'd definitely have a head start simply knowing that these things were _possible_, and getting a boost on knowing how a computer could be structured.