操作系统DIY手册--WriteYourOwnOperatingSystemTutorial资源-CSDN文库

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操作系统DIY手册.rar （19个子文件）

BOOT12.ASM 13KB

H.ASM 3KB

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Write Your Own Operating System - Lesson 2.htm 16KB

Write Your Own Operating System - Lesson 5.htm 10KB

Write Your Own Operating System - Lesson 6.htm 18KB

Write Your Own Operating System - Lesson 3.htm 12KB

Write Your Own Operating System - Lesson 1.htm 26KB

Write Your Own Operating System - Lesson 4.htm 15KB

Write Your Own Operating System - Lesson 7.htm 16KB

操作系统DIY手册（第二课）.doc 30KB

操作系统DIY手册（第三课）.doc 29KB

操作系统DIY手册（第一课）.doc 39KB

操作系统DIY手册（第五课）.doc 26KB

操作系统DIY手册（第四课）.doc 29KB

操作系统DIY手册（第六课）.doc 32KB

nasmw.exe 317KB

LESSON6.ASM 1KB

LESSON5.ASM 3KB

HELOWRLD.ASM 3KB

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">  <HTML xmlns="http://www.w3.org/TR/REC-html40" xmlns:v = "urn:schemas-microsoft-com:vml" xmlns:o = "urn:schemas-microsoft-com:office:office" xmlns:w = "urn:schemas-microsoft-com:office:word"><HEAD><TITLE>Write Your Own Operating System - Lesson 1</TITLE> <META http-equiv=Content-Type content="text/html; charset=windows-1252"> <META content=Word.Document name=ProgId> <META content="MSHTML 6.00.2600.0" name=GENERATOR> <META content="Microsoft Word 9" name=Originator><LINK href="./lesson1_files/filelist.xml" rel=File-List> <STYLE>@page Section1 {size: 8.5in 11.0in; margin: 1.0in 1.25in 1.0in 1.25in; mso-header-margin: .5in; mso-footer-margin: .5in; mso-paper-source: 0; } P.MsoNormal { FONT-SIZE: 12pt; MARGIN: 0in 0in 12pt; FONT-FAMILY: "Times New Roman"; mso-style-parent: ""; mso-pagination: widow-orphan; mso-fareast-font-family: "Times New Roman"; mso-bidi-font-weight: bold } LI.MsoNormal { FONT-SIZE: 12pt; MARGIN: 0in 0in 12pt; FONT-FAMILY: "Times New Roman"; mso-style-parent: ""; mso-pagination: widow-orphan; mso-fareast-font-family: "Times New Roman"; mso-bidi-font-weight: bold } DIV.MsoNormal { FONT-SIZE: 12pt; MARGIN: 0in 0in 12pt; FONT-FAMILY: "Times New Roman"; mso-style-parent: ""; mso-pagination: widow-orphan; mso-fareast-font-family: "Times New Roman"; mso-bidi-font-weight: bold } H1 { FONT-SIZE: 16pt; MARGIN: 0in 0in 12pt; FONT-FAMILY: Arial; mso-pagination: widow-orphan; mso-bidi-font-weight: normal; mso-style-next: Normal; mso-outline-level: 1; mso-bidi-font-size: 12.0pt; mso-bidi-font-family: "Courier New"; mso-font-kerning: 0pt } P.MsoTitle { FONT-WEIGHT: bold; FONT-SIZE: 16pt; MARGIN: 12pt 0in 3pt; FONT-FAMILY: Arial; TEXT-ALIGN: center; mso-pagination: widow-orphan; mso-fareast-font-family: "Times New Roman"; mso-outline-level: 1; mso-font-kerning: 14.0pt } LI.MsoTitle { FONT-WEIGHT: bold; FONT-SIZE: 16pt; MARGIN: 12pt 0in 3pt; FONT-FAMILY: Arial; TEXT-ALIGN: center; mso-pagination: widow-orphan; mso-fareast-font-family: "Times New Roman"; mso-outline-level: 1; mso-font-kerning: 14.0pt } DIV.MsoTitle { FONT-WEIGHT: bold; FONT-SIZE: 16pt; MARGIN: 12pt 0in 3pt; FONT-FAMILY: Arial; TEXT-ALIGN: center; mso-pagination: widow-orphan; mso-fareast-font-family: "Times New Roman"; mso-outline-level: 1; mso-font-kerning: 14.0pt } P.MsoBodyText { FONT-SIZE: 12pt; MARGIN: 0in 0in 12pt; FONT-FAMILY: "Times New Roman"; mso-pagination: widow-orphan; mso-fareast-font-family: "Times New Roman" } LI.MsoBodyText { FONT-SIZE: 12pt; MARGIN: 0in 0in 12pt; FONT-FAMILY: "Times New Roman"; mso-pagination: widow-orphan; mso-fareast-font-family: "Times New Roman" } DIV.MsoBodyText { FONT-SIZE: 12pt; MARGIN: 0in 0in 12pt; FONT-FAMILY: "Times New Roman"; mso-pagination: widow-orphan; mso-fareast-font-family: "Times New Roman" } A:link { COLOR: blue; TEXT-DECORATION: underline; text-underline: single } SPAN.MsoHyperlink { COLOR: blue; TEXT-DECORATION: underline; text-underline: single } A:visited { COLOR: purple; TEXT-DECORATION: underline; text-underline: single } SPAN.MsoHyperlinkFollowed { COLOR: purple; TEXT-DECORATION: underline; text-underline: single } DIV.Section1 { page: Section1 } </STYLE> </HEAD> <BODY lang=EN-US style="tab-interval: .5in" vLink=purple link=blue> <DIV class=Section1> <A name=_Toc534120514>Write Your Own Operating System Tutorial</A> <DIV style="BORDER-RIGHT: medium none; PADDING-RIGHT: 0in; BORDER-TOP: medium none; PADDING-LEFT: 0in; PADDING-BOTTOM: 1pt; BORDER-LEFT: medium none; PADDING-TOP: 0in; BORDER-BOTTOM: windowtext 0.75pt solid"> <P class=MsoNormal style="BORDER-RIGHT: medium none; PADDING-RIGHT: 0in; BORDER-TOP: medium none; PADDING-LEFT: 0in; PADDING-BOTTOM: 0in; BORDER-LEFT: medium none; PADDING-TOP: 0in; BORDER-BOTTOM: medium none; mso-border-bottom-alt: solid windowtext .75pt; mso-padding-alt: 0in 0in 1.0pt 0in"><A href="http://www.cse.unl.edu/~jgompert/OS/introduction.htm">Previous</A>           <A href="http://www.cse.unl.edu/~jgompert/OS/TableOfContents.htm">Table of Contents</A>         <A href="http://www.cse.unl.edu/~jgompert/OS/lesson2.htm">Next Lesson</A></DIV> <H1>Lesson 1: The Boot Sector</H1> In this lesson well learn about the contents of the boot sector so that we can learn to write our own boot program. When the computer boots from a floppy, BIOS (Basic Input/Output System) reads the disk and loads the first sector into memory at address 0000:7C00.  This first sector is called the DOS Boot Record (DBR).  BIOS jumps to the address 0x7C00 and begins executing instructions there.  It is these instructions (the boot loader) that will load the operating system (OS) into memory and begin the OSs boot process. The first thing to do is to take a look inside the Boot Record.  The DOS utility DEBUG is a widely available tool that can be used to view the contents of memory and disks.  Well use DEBUG to look at a floppy disks Boot Record. At a DOS (or Windows) command prompt type debug.  This will leave you with just a hyphen as a prompt.  If you enter letter d as a command and press Enter, it will show you a portion of the contents of RAM.  Typing the question mark as a command will give you a list of all the available commands in DEBUG.  (Be very careful when using the DEBUG utility.  This utility can be used to overwrite data on any disk drive, possibly causing loss of data.) Place a freshly formatted disk in the A: drive.  To load the Boot Record off your floppy disk, type the following command. <SPAN