25 Feb
2011
25 Feb
'11
12:11 p.m.
What is so odd
about that? It seems to be just a normal 4040-based
controller board. The 4002s are the special RAMs for this processor, the
4289 is an interface from the strange 4040 bus to conventional memory
devices, presumably to link up the 1702 EPROMs.
In my experience, 4040-based equipment is even rarer than 4004-based
designs.