Control store: Difference between revisions

A '''control store''' is the part of a [[Central processing unit|CPU's]] [[control unit]] that stores the CPU's [[microprogram]]. It is usually accessed by a [[microsequencer]]. Early types of control store took the form of diode-arrays that were accessed via address decoders, but were later implemented usingas writable microcode that was stored in a form of [[read only memory]] called a writable control store. The outputs generally had to go through a register to prevent a race condition from occurring. The register was clocked by the clock signal of the system it was running on.