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Control store - Wikipedia

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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.

wikipedia.org dumped 2003-03-17 with terodump




 
 
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