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Jelly qq:457283 Http://blog.csdn.net/jznsmail ! The main functions of this program! 1.bootsect.s starts from 0X7C00.! 2. Copy yourself to the 0x90000 place! 3. Read the SETUP.S program from the disk 2nd sector to the 0X90200! 4. Read system to 0x1000

; This program is compiled by TASM ; CIH file-type virus detection and elimination program Gofirst MACRO XOR CX,CX XOR DX,DX MOV ax,4200h INT 21H; file pointer to top of file Endm Alterline MACRO MOV DL,0DH MOV ah,02h INT 21H; carriage return MOV dl,

Chapter 4 What is a regular expression When writing a program or webpage that processes strings, it is often necessary to find strings that meet certain complex rules. Regular Expressions are the tool ports used to describe these Rules. In other

Today, a colleague is leaving the company to go to the computer newspaper to do things. At noon, everyone held a farewell meeting for him. Everyone drank a lot.After I sent my colleague away, I went back to the office and felt dizzy. I didn't want

Linux File Management Content outline:# Basic concepts of file system and Shell# File and directory operation commands# VI usage# Manage software packagesI. Basic concepts of file system and Shell1. File System DescriptionA file system is a system

The shell is the interface between the user and the Linux operating system.CCat Zdd Browse the contents of a ZDD fileCat Zdd1 Zdd2 Browsing the contents of multiple filesCat-n ZDD Browse the contents of a file Zdd and display line numbersCD back to

CCat Zdd Browse the contents of a ZDD fileCat Zdd1 Zdd2 Browsing the contents of multiple filesCat-n ZDD Browse the contents of a file Zdd and display line numbersCD back to the start directory, that is, just logged into the system directory, CD

The previous article described how to use a virtual machine to run our written operating system, but the previous operating system only exists in the boot sector, and then we will see how the program jumps from the boot sector to another

For a PC, a floppy disk can be divided into 512 bytes of space, called a sector. A sector is the minimum granularity of a disk operation. Each read or write operation must be one or more sectors. If a disk can be used to start the operating system,

Protection Mode (Protected mode, or sometimes pmode) is a 80286 series and later x86 compatible CPU Operation Mode. The protection mode has some new features and is designed to enhance the stability of multiple workers and systems, such as memory