Intel 80286 User Manual

PREFACE
This manual describes the 80286, the most powerful 16-bit microprocessor in the 8086 family, and the
80287 Numeric Processor Extension (NPX).
ORGANIZATION OF THIS MANUAL
This manual is, essentially, two books in one. The first book describes the 80286, the second the 80287
NPX.
80286
The 80286 contains a table of contents, eleven chapters, four appendices, and an index. For more
information on the 80286 book's organization, see its first chapter, Chapter
1, "Introduction to the
80286." Section 1.4
in that chapter explains the organization in detail.
80287 NPX
The 80287 NPX contains a preface, table of contents, four chapters, three appendices, and a glossary.
For more information
on the 80287 NPX book's organization, see its preface.
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Intel 80286 Specifications

General

Processor Type	Microprocessor
Clock Speed	6 MHz to 25 MHz
Transistor Count	134, 000
Addressable Memory	16 MB
Instruction Set	x86
Architecture	x86
Data Bus Width	16-bit
Address Bus Width	24-bit
Operating Modes	Real mode, Protected mode
Process Technology	1.5 µm
Voltage	5V
Introduced	1982
Package	68-pin PGA