May 2024
Intermediate to advanced
665 pages
23h 2m
English
book
The X86 Microprocessors: Architecture and Programming (8086 to Pentium), 1st Edition
by Lyla B. Das
Content preview from The X86 Microprocessors: Architecture and Programming (8086 to Pentium), 1st Edition
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
appendix d
list of dos and bios functions
In this, some of the DOS 21H functions and the BIOS 10H and 16H functions are listed.
i) List of important DOS INT 21H services
DOS system calls use the 21H vector. Some of the important INT 21H services are listed here.
Function No. Action Returns/Expects
AH = 01
Read character from standard input
device with echo
Returns:
AL = ASCII of the input key
AH = 02
Write character to standard output
device
Expects:
DL = ASCII code of output data
AH = 05
Write character to printer Expects:
DL = ASCII of the output
AH = 08
Read character input from standard
input device, without echo
Returns:
AL = ASCII of the input key
AH
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.