On 11/11/2005 at 11:12 PM woodelf wrote:
 >PS.  As for getting  7400 off  scrap boards, if I had the scrap boards I
 >would most likely try to get the scrap item working again. :D 
Me too. I've got piles of obscure boards that I'd like to get going again
sometime. Most have no real practical function, but are part of the
history of computing/electronics.
About the only thing I'll raid for parts are no-name clone PC
motherboards and cards.. And those are not a good source of standard TTL,
alas.
 There are plenty of junk boards that have no particular useful function.
 I've got a bunch of ISA cards that I salvaged.  All were old models of a
 gizmo that appeared to a PC as a monochrome adapter, but which translated
 the CPU writes to video memory to serial codes to a VT-220 type terminal. 
Now that sounds unusual enough to be very interesting. Put it this way,
if I had something like that I'd be trying to track down a dump of that
missing ROM. I would not be raiding it for parts.
-tony