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R/M 000 001 010 011 100 101 110 111 MOD = 11 W=0 AL CL DL BL AH CH DH BH W = 1 AX CX DX BX SP BP SI DI R/M EFFECTIVE ADDRESS CALCULATION MOD=00 000 (BX) + (SI) 001 (BX) + (DI) 010 011 100 101 110 DIRECT ADDRESS 111 (BX) (BP)+(SI) (BP) + (DI) (SI) (DI) MOD=01 (BX) + (SI) + D8 (BX) + (DI) + D8 (BP) + (SI) + D8 (BP)+ (DI) + D8 (SI) + D8 (DI) + D8 (BP) + D8 (BX) + D8 MOD=10 (BX) + (SI) + D16 (BX) + (DI) + D16 (BP) + (SI) + D16 (BP)+(DI)+D16 (SI) + D16 (DI) + D16 (BP) + D16 (BX) + D16

R/M 000 001 010 011 100 101 110 111 MOD = 11 W=0 AL CL DL BL AH CH DH BH W = 1 AX CX DX BX SP BP SI DI R/M EFFECTIVE ADDRESS CALCULATION MOD=00 000 (BX) + (SI) 001 (BX) + (DI) 010 011 100 101 110 DIRECT ADDRESS 111 (BX) (BP)+(SI) (BP) + (DI) (SI) (DI) MOD=01 (BX) + (SI) + D8 (BX) + (DI) + D8 (BP) + (SI) + D8 (BP)+ (DI) + D8 (SI) + D8 (DI) + D8 (BP) + D8 (BX) + D8 MOD=10 (BX) + (SI) + D16 (BX) + (DI) + D16 (BP) + (SI) + D16 (BP)+(DI)+D16 (SI) + D16 (DI) + D16 (BP) + D16 (BX) + D16

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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a) Convert 89806910h from machine language to its corresponding assembly language.
Show all of your workings. 

8. R/M 000 001 010 011 100 101 110 111 Use the following charts to answer the questions (a) and (b) MOD = 11 W=0 AL CL DL BL AH CH DH BH W=1 AX CX DX BYTE 1 1000 10 OP CODE BX SP BP SI DI R/M 000 001 010 (BX) + (SI) (BX) + (DI) (BP) + (SI) (BP) + (DI) (SI) 101 (DI) 110 DIRECT ADDRESS 111 (BX) EFFECTIVE ADDRESS CALCULATION MOD=00 011 100 MOD=01 DW MOD REG R/M (BX) + (SI) + D8 (BX) + (DI) + D8 (BP) + (SI) + D8 (BP)+(DI) + D8 (SI) + D8 (DI) + D8 (BP) + D8 (BX) + D8 Figure: R/M vs MOD Chart for MOV: 100010 instruction 11 OR REGISTER SELECT (SEE FIGURE 3-7) BYTE 3 LOW DISPLACEMENT HIGH DISPLACEMENT DIRECT ADDRESS ! LOW BYTE MOD=10 (BX) + (SI) + D16 (BX) + (DI) + D16 (BP) + (SI) + D16 (BP) + (DI) + D16 (SI) + D16 (DI) + D16 (BP) + D16 (BX) + D16 Figure: MOV: 100010 instruction template BYTE 4 DIREST ADDRESS HIGH BYTE (5 BITS) ADDRESSING MODE (SEE FIGURE 3.8) -BYTEWORD DATA 0 BYTE 1 = WORD - DIRECTION TO/FROM REG 0= FROM 1 - TO -OPERATION CODE
Transcribed Image Text:8. R/M 000 001 010 011 100 101 110 111 Use the following charts to answer the questions (a) and (b) MOD = 11 W=0 AL CL DL BL AH CH DH BH W=1 AX CX DX BYTE 1 1000 10 OP CODE BX SP BP SI DI R/M 000 001 010 (BX) + (SI) (BX) + (DI) (BP) + (SI) (BP) + (DI) (SI) 101 (DI) 110 DIRECT ADDRESS 111 (BX) EFFECTIVE ADDRESS CALCULATION MOD=00 011 100 MOD=01 DW MOD REG R/M (BX) + (SI) + D8 (BX) + (DI) + D8 (BP) + (SI) + D8 (BP)+(DI) + D8 (SI) + D8 (DI) + D8 (BP) + D8 (BX) + D8 Figure: R/M vs MOD Chart for MOV: 100010 instruction 11 OR REGISTER SELECT (SEE FIGURE 3-7) BYTE 3 LOW DISPLACEMENT HIGH DISPLACEMENT DIRECT ADDRESS ! LOW BYTE MOD=10 (BX) + (SI) + D16 (BX) + (DI) + D16 (BP) + (SI) + D16 (BP) + (DI) + D16 (SI) + D16 (DI) + D16 (BP) + D16 (BX) + D16 Figure: MOV: 100010 instruction template BYTE 4 DIREST ADDRESS HIGH BYTE (5 BITS) ADDRESSING MODE (SEE FIGURE 3.8) -BYTEWORD DATA 0 BYTE 1 = WORD - DIRECTION TO/FROM REG 0= FROM 1 - TO -OPERATION CODE
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