Jump MicroOpt 0000000 MAR E PC Address MicroOp2 Dest NOP O000000 DUD0001 IR + M [MAR.] 0000010 PC PC + 1 0000011 MAR - IR[11-01 NOP 0000000 NOP 0000000 2N0P 0000000 If IRL15-12] = NieraCp [4-1] If IR[15-12] = MicroCp2 (4-1) If IR[15-12)- MicroCp2(4-11 If IR(15-121 = MicreCp2 [4-1] D001000 1t IR[15 12] - MicroCp2[4-1] 0000100 00000 0100000 0000101 00010 0100.1 D000110 00100 01010:0 000111 00110 0101:00 01000 0101111 ... ... 0101010 MAR X MET AC 0000000 0101011 M[MAR < MBR 010.100 MARX 0101101 MBRN(MAR] 0101110 AC + AC - MBR NOP NOP NOP CC00000 CCD0000 CC00000 NOP CCD0000 0101111 MAR MAR NOP CO00000 FIGURE 4.23 Selected Statements in MARIE's Microprogram

Jump MicroOpt 0000000 MAR E PC Address MicroOp2 Dest NOP O000000 DUD0001 IR + M [MAR.] 0000010 PC PC + 1 0000011 MAR - IR[11-01 NOP 0000000 NOP 0000000 2N0P 0000000 If IRL15-12] = NieraCp [4-1] If IR[15-12] = MicroCp2 (4-1) If IR[15-12)- MicroCp2(4-11 If IR(15-121 = MicreCp2 [4-1] D001000 1t IR[15 12] - MicroCp2[4-1] 0000100 00000 0100000 0000101 00010 0100.1 D000110 00100 01010:0 000111 00110 0101:00 01000 0101111 ... ... 0101010 MAR X MET AC 0000000 0101011 M[MAR < MBR 010.100 MARX 0101101 MBRN(MAR] 0101110 AC + AC - MBR NOP NOP NOP CC00000 CCD0000 CC00000 NOP CCD0000 0101111 MAR MAR NOP CO00000 FIGURE 4.23 Selected Statements in MARIE's Microprogram

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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Question

Using Figure 4.23 as a guide, write the binary microcode for MARIE’s Load instruction. Assume that the microcode begins at instruction line number 0110000 .