Question

What is control word?Give the structure of control word.

Answer 1

Answer:

Control word is defined as a word whose individual bits represent the various control signal. Therefore each of the control steps in the control sequence of an instruction defines a unique combination of 0s and 1s in the CW. ... The control words related to an instructions are stored in microprogram memory.

Explanation:

Answer 2

Control Word: In a control word various control signals are represented by its individual bits. It is a set of micro-instructions in a micro-routine. It is used in control data register in any instruction cycle.

It consists of:

• branch conditions
• flags
• control signal field
• next microinstruction field

control data register size  =  size of control word