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Add the following instructions to the computer of Sec 7-3 (EA is the effective address). Write the symbolic microprogram for each routine as in Table 7-2. (Note that AC must not change in value unless the instruction specifies a change in AC.)   Symbol Opcode Symbolic Function   Description         AND 0100 AC ← AC ∧ M[EA] AND

Add the following instructions to the computer of Sec 7-3 (EA is the effective address). Write the symbolic microprogram for each routine as in Table 7-2. (Note that AC must not change in value unless the instruction specifies a change in AC.)   Symbol Opcode Symbolic Function   Description         AND 0100 AC ← AC ∧ M[EA] AND

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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7-16. Add the following instructions to the computer of Sec 7-3 (EA is the effective address). Write the symbolic microprogram for each routine as in Table 7-2. (Note that AC must not change in value unless the instruction specifies a change in AC.)

 

Symbol

Opcode

Symbolic Function  

Description

       

AND

0100

AC ← AC ∧ M[EA]

AND

SUB

0101

AC ← AC - M[EA]

Subtract

ADM

0110

M[EA] ← M[EA] + AC

Add to memory
TABLE 7-2 Symbolic Microprogram (Partial) Label Microoperations CD BR AD ORG O ADD: NOP I CALL INDRCT READ JMP NEXT ADD U JMP FETCH ORG 4 BRANCH: NOP S JMP OVER NOP NOP FETCH INDRCT U JMP OVER: I CALL ARTPC U JMP FETCH ORG 8 NOP АCTDR STORE: I CALL INDRCT U JMP NEXT WRITE JMP FETCH ORG 12 NOP READ EXCHANGE: I CALL INDRCT JMP NEXT ACTDR, DRTAC WRITE JMP NEXT U JMP FETCH ORG 64 FETCH: РСТAR JMP JMP NEXT READ, INCPC NEXT DRTAR U МАР JMP RET INDRCT: READ U NEXT DRTAR U
Transcribed Image Text:TABLE 7-2 Symbolic Microprogram (Partial) Label Microoperations CD BR AD ORG O ADD: NOP I CALL INDRCT READ JMP NEXT ADD U JMP FETCH ORG 4 BRANCH: NOP S JMP OVER NOP NOP FETCH INDRCT U JMP OVER: I CALL ARTPC U JMP FETCH ORG 8 NOP АCTDR STORE: I CALL INDRCT U JMP NEXT WRITE JMP FETCH ORG 12 NOP READ EXCHANGE: I CALL INDRCT JMP NEXT ACTDR, DRTAC WRITE JMP NEXT U JMP FETCH ORG 64 FETCH: РСТAR JMP JMP NEXT READ, INCPC NEXT DRTAR U МАР JMP RET INDRCT: READ U NEXT DRTAR U
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