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<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"><HTML><HEAD><TITLE>80386 Programmer's Reference Manual -- Chapter 14</TITLE></HEAD><BODY><B>up:</B> <A HREF="toc.htm">Table of Contents</A><BR><B>prev:</B> <A HREF="s13_03.htm">13.3 Differences From 80286</A><BR><B>next:</B> <A HREF="s14_01.htm">14.1 Physical Address Formation</A><P><HR><P><H1>Chapter 14 80386 Real-Address Mode</H1><P>The real-address mode of the 80386 executes object code designed forexecution on 8086, 8088, 80186, or 80188 processors, or for execution in thereal-address mode of an 80286:<P>In effect, the architecture of the 80386 in this mode is almost identicalto that of the 8086, 8088, 80186, and 80188. To a programmer, an 80386 inreal-address mode appears as a high-speed 8086 with extensions to theinstruction set and registers. The principal features of this architectureare defined in <A HREF="c02.htm">Chapters 2</A> and <A HREF="c03.htm">3</A>.<P>This chapter discusses certain additional topics that complete the systemprogrammer's view of the 80386 in real-address mode:<UL><LI>Address formation.<LI>Extensions to registers and instructions.<LI>Interrupt and exception handling.<LI>Entering and leaving real-address mode.<LI>Real-address-mode exceptions.<LI>Differences from 8086.<LI>Differences from 80286 real-address mode.</UL><P><A HREF="s14_01.htm">14.1 Physical Address Formation</A><BR><A HREF="s14_02.htm">14.2 Registers and Instructions</A><BR><A HREF="s14_03.htm">14.3 Interrupt and Exception Handling</A><BR><A HREF="s14_04.htm">14.4 Entering and Leaving Real-Address Mode</A><BR><A HREF="s14_05.htm">14.5 Switching Back to Real-Address Mode</A><BR><A HREF="s14_06.htm">14.6 Real-Address Mode Exceptions</A><BR><A HREF="s14_07.htm">14.7 Differences From 8086</A><BR><A HREF="s14_08.htm">14.8 Differences From 80286 Real-Address Mode</A><P><HR><P><B>up:</B> <A HREF="toc.htm">Table of Contents</A><BR><B>prev:</B> <A HREF="s13_03.htm">13.3 Differences From 80286</A><BR><B>next:</B> <A HREF="s14_01.htm">14.1 Physical Address Formation</A></BODY>⌨️ 快捷键说明
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