The plus (+) indicates a more advanced problem and the asterisk (*) indicates that a solut...

The plus (+) indicates a more advanced problem and the asterisk (*) indicates that a solution is available on the Companion Website for the text.

*Repeat Problem for the CISC instruction, Memory Scalar Add. This instruction uses the contents of R[SB] as the vector length. It adds the elements of the vector with its least significant element in memory pointed to by R[SA] and places the result in the memory location pointed to by R[DR].

Problem

Write microcode for the execution part of each of the following CISC instructions. Give both a register transfer description and binary or hexadecimal representations similar to those shown in Table for the binary code for each microinstruction.

Table Example Micro programs for CISC Architecture

(a) Branch if overflow

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(b) Branch if greater than zero

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(c) Compare less than