buss input

most recent versions of all logics so far are at https://www.thingiverse.com/thing:2829196
I recommend downloading from there.

this is a 8 bit input/output buss logic.
A is input to the buss,
I is input active.
each register and alu unit will use one these to output to the buss.

http://nextbigfuture.com/2016/04/molecular-mechanical-computer-design.html

http://www.imm.org/Reports/rep046.pdf

the scad file also contains the other components that have been uploaded previously.
t.