The present invention is a method for reconfiguring a RAM into a ROM.
First a RAM is fabricated on a platform ASIC in which the memory is
patterned with first and second metal layers that intersect over each
cell, wherein the first metal layer comprises local core cell nodes and
the second metal layer comprises power/ground. The RAM is also fabricated
with metal junction points on the first metal layer in at least a portion
of the intersections. Thereafter, the RAM is reconfigured to a ROM by
forming vias between the intersections of the first and second metal
layers over the junction points to connect the first metal layer to the
second metal layer.