324 results about "Control store" patented technology

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. Early types of control store took the form of diode-arrays that were accessed via address decoders, but were later implemented as 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.