When a microinstruction is read from the control memory it is transferred to a _________.
A)control buffer register
B)control memory
C)control address register
D)control unit

Question

Quizplus · Accepted Answer

When a microinstruction is read from the control memory, it is transported to the control buffer register (CBR). The CBR is a temporary register where the microinstruction is held before it is executed by the control unit. The control unit uses the microinstruction stored in the CBR to execute the desired operation on the data present in the processor. The other options (B) control memory and (C) control address register are not where the microinstruction is ultimately executed. (D) control unit is where the execution takes place, but the microinstruction is not directly transferred there from the control memory.

When a Microinstruction Is Read from the Control Memory It