Why is the pinout being increased from 68 to 72 pins, what do the added 4 pins do? Can I make a board layout to accomodate either socket to prevent having 2 revisions?
Starting in June, 2000, Dallas Semiconductor will be shipping TINI Boards on a 72 pin SIMM, instead of the 68 pin SIMM they had been using.
This change is being made simply because 72 pins is a much more common form factor. This affects availability and cost of the sockets. The extra four pins are not connected.