INTRODUCTION TO COMPUTERS
COMPUTER ARCHITECTURE AND ORGANIZATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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PC
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IR
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UPC (MPC)
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None of the mentioned
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Detailed explanation-1: -A control word in the microinstruction specifies one or multiple micro-operations for a data processor. The next address is calculated in the circuit of the next address generator and then transferred to the control address register for reading the next microinstruction when the micro-operations are being executed.
Detailed explanation-2: -Micro-routine : A sequence of control words corresponding to the control sequence of a machine instruction constitutes the micro-routine for that instruction. Micro-instruction: Individual control words in this micro-routine are referred to as microinstructions.
Detailed explanation-3: - A sequence of microinstructions constitutes a microprogram. Since alterations of the microprogram are not needed once the control unit is in operation, the control memory can be a read-only memory (ROM). ROM words are made permanent during the hardware production of the unit.