29 Nov
2009
29 Nov
'09
3:14 p.m.
On Sun, 29 Nov 2009, Brent Hilpert wrote:
A number of early Japanese calcs were made from a
logic combination of SSI IC
NOR gates and discrete-diode AND gates to make AND-NOR logic. Quite flexible in
that the AND gates could have as many inputs as needed, canonical state
machines were easy. The calcs are packed with hundreds of diodes and a few ICs.
Some other early IC calcs used only half-a-dozen-or-so IC types; 2,3,4-in gates
and dual-FF for example.
Would that be a suitable use for something like a 4004? :-)