Expansion of Control Memory Capacity by a Factor less t
Original Publication Date: 1981-Jun-01
Included in the Prior Art Database: 2005-Feb-11
Presently known methods of expanding the capacity of RAM (random-access memory) storage systems generally involve increasing the number of memory array modules by a factor of 2 and adding an additional address bit decoding channel for each doubling increment of capacity. Obviously, in certain instances it would be desirable to increase capacity by a factor less than 2, e.g., in systems wherein the amount of additional capacity required is less than the original capacity. However, such expansions may present problems in respect to memory systems having complex addressing structures, particularly in control memory systems commonly used for microprogram-control functions.