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4 <TITLE>80386 Programmer's Reference Manual -- Chapter
01</TITLE>
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13 <H1>Chapter
1 -- Introduction to the
80386</H1>
15 The
80386 is an advanced
32-bit microprocessor optimized for multitasking
16 operating systems and designed for applications needing very high
17 performance. The
32-bit registers and data paths support
32-bit addresses
18 and data types. The processor can address up to four gigabytes of physical
19 memory and
64 terabytes (
2^(
46) bytes) of virtual memory. The on-chip
20 memory-management facilities include address translation registers,
21 advanced multitasking hardware, a protection mechanism, and paged virtual
22 memory. Special debugging registers provide data and code breakpoints even
23 in ROM-based software.
25 <A HREF=
"s01_01.htm">1.1 Organization of This Manual
</A><BR>
26 <A HREF=
"s01_02.htm">1.2 Related Literature
</A><BR>
27 <A HREF=
"s01_03.htm">1.3 Notational Conventions
</A><BR>
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