There are several discrete transistor computers posted on the net, some
with complete schematics.
http://hackaday.com/2012/04/20/building-a-computer-with-discrete-transistor…
There was a German (possibly Dutch?) guy that made a discrete transistor
computer using all one kind of SMT transistor and other SMT components on
PC boards, it was the size of a shoebox. I can't find the link now.
Jon