Nifty!  I entered the ALU and part of the control board
entered into
gschem with the same intent.  Perhaps we could collaborate on that later
on.  I made some alterations to allow use of a bog-standard VME chassis. 
Sure.  I still don't quite understand everything about the user modes or
addressing.  Its possible that it I understand it and just don't think it
could be that simple.  : )
 On one of the pages linked from the 
homebrewcpu.org
page is a project that
uses surface-mount transistors on what amount to tiny flipchips.  If
you're insane enough to try a discrete 8080, go with that approach. 
I saw that.  If I were to do anything like that I would want it to be an
educational tool.  And for people who want to build it for fun, art.  The
thing needs to lay flat so it could hang on a wall.
Don't tell me you wouldn't want to hang CP/M on the wall...  : )
 At that rate, the complete machine might demand 20 amps
or more. 
Sure.  And with a 5MHz clock it would multiply at the speed of a 100MHz+
486.  : )
 At least I'd like to have LED displays for each
bus, each flag, and each
register. 
In a little Altair 680 sized box!
Grant