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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3-4
THE
x86 MICROPROCESSORS
This call exits with the ASCII value of the key pressed being available in AL. The key
pressed is not echoed on the screen.
iii) Write a character to the standard display unit
For this, the ASCII value of the character to be displayed should be in DL.
MOV DL, S’
MOV AH, 02
INT 21H
With this, the character S is displayed on the video screen.
iv) Display a character string on the standard display unit
The logical address DS : DX should point to the beginning of the string. This is to
be followed by the following instructions:
MOV AH, 09
INT 21H
3.1.3 | Instruction Set of 8086
The instruction set of the 8086 is reasonably large. Besides, each instruction can be used in
various addressing modes making the whole set ...
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