May 2024
Intermediate to advanced
889 pages
30h 8m
English
book
The X 86 Microprocessors: Architecture, Programming and Interfacing (8086 to Pentium) 2nd Edition by Pearson
by Lyla B. Das
Content preview from The X 86 Microprocessors: Architecture, Programming and Interfacing (8086 to Pentium) 2nd Edition by Pearson
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2-24
THE
x86 MICROPROCESSORS
Note All the instructions we have coded in this section are at least two bytes in length.
However, there are some instructions that have only one byte—examples are STI (set
interrupt flag) and CLD (clear direction flag). Try to find out why they are only one byte
long.
KEY POINTS OF THIS CHAPTER
l An assembler is a software that translates assembly language into machine code on a one to
one basis
l Assemblers convert labels to memory addresses
l An assembly language program contains instructions and directives—the former
produces executable code but the latter only gives directions to the assembler
l For an assemb
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