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: PEARSON
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Question
a) What is the contents of AL, and CL registers after executing the following instruction
sequence?
ADD AL, CL
AAA
Assume that CL = 32 (ASCII 2), AL = 35 (ASCII 5)
b) write an assembly language to set bit 8 in the AX register.
c) Write an assembly language to invert high nibble bit of BX register.
d) What is the addressing mode and contain of IP, CS, and the registers BL, and SI.
MOV BL, [Si] H
Before the execution IP = 0000, CS = 0200, SI= 0404H.
Memory Data
Address
0400H
02H
0401H
3D H
0402H
AO H
0403H
04 H
0404H
FD H
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Transcribed Image Text:a) What is the contents of AL, and CL registers after executing the following instruction sequence? ADD AL, CL AAA Assume that CL = 32 (ASCII 2), AL = 35 (ASCII 5) b) write an assembly language to set bit 8 in the AX register. c) Write an assembly language to invert high nibble bit of BX register. d) What is the addressing mode and contain of IP, CS, and the registers BL, and SI. MOV BL, [Si] H Before the execution IP = 0000, CS = 0200, SI= 0404H. Memory Data Address 0400H 02H 0401H 3D H 0402H AO H 0403H 04 H 0404H FD H
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