Repeat Problem 10-21 for the following CISC instructions that are specified by register transfer statements.

Problem 10-21

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 10-6 for the binary code for each microinstruction.

Table 10-6

(a) Branch if overflow

(b) Branch if greater than zero

(c) Compare less than

Transcribed Image Text:

(a) Push: R[SA] DR=SA. R[SA] + 1 followed by M[R[SA]] R[SB]. Assume (b) Pop: R[DR] M[R[SA]] followed by R[SA] R[SA] 1. Assume SB=SA.