Encyclopedia > Control store

Article Content

Control store

A control store is the part of a CPU's control unit that stores the CPU's microprogram. It is usually accessed by a microsequencer.

A control store is usually implemented as a diode-array of read-only memory on modern VLSI CPUs. Historically, IBM mainframes loaded their microprograms from floppy disks into a control store consisting of ultra-high speed random-access memory. This permitted IBM to easily repair microprogramming defects in the field.

All Wikipedia text is available under the terms of the GNU Free Documentation License

Search Encyclopedia

Search over one million articles, find something about almost anything!

Featured Article

KANU

... the one-party section of the constitution. By early 1992, several new parties had formed, and multiparty elections were held in December 1992. President Moi was ...