Quadruple word, multiplexed, paged mode and cache memory.

摘要

A 64 bit wide memory is multiplexed over a 32 bit data bus to provide data to a 64 bit line size cache memory controlled by an 82385 cache controller. The memory addresses to all 64 bits of memory are held during the entire transfer so that a zero wait state second 32 bit transfer occurs. Logic develops the necessary next address and ready pulses and blocks these signals from the cache controller. Logic also handles the bit 2 address for the main and cache memories. The main memory is operated in paged mode to further increase system performance.