Priority assignment apparatus for use in a memory controller

摘要

This relates to an apparatus for assigning priority to information temporarily stored in memory controller stack. Associated with each level of the stack is a counter which measures the length of time the information has been stored. A plurality of comparators and associated control logic determines the stack level which contains information which has been stored the longest. If the destination memory associated with the contents of this level becomes available, this level is given priority with respect to transmission to its destination memory.