INTEL387TMDX Datasheet, PDF (1/41 Pages) Intel Corporation – Intel387TM DX MATH COPROCESSOR

Intel387^TM DX
MATH COPROCESSOR
Y High Performance 80-Bit Internal
Architecture
Y Implements ANSI IEEE Standard 754-
1985 for Binary Floating-Point
Arithmetic
Y Expands Intel386TM DX CPU Data
Types to Include 32- 64- 80-Bit
Floating Point 32- 64-Bit Integers and
18-Digit BCD Operands
Y Directly Extends Intel386TM DX CPU
Instruction Set to Include
Trigonometric Logarithmic
Exponential and Arithmetic Instructions
for All Data Types
Y Upward Object-Code Compatible from
8087 and 80287
Y Full-Range Transcendental Operations
for SINE COSINE TANGENT
ARCTANGENT and LOGARITHM
Y Built-In Exception Handling
Y Operates Independently of Real
Protected and Virtual-8086 Modes of
the Intel386^TM DX Microprocessor
Y Eight 80-Bit Numeric Registers Usable
as Individually Addressable General
Registers or as a Register Stack
Y Available in 68-Pin PGA Package
Y One Version Supports 16 MHz – 33 MHz
Speeds
(See Packaging Spec Order 231369)
The Intel387^TM DX Math CoProcessor (MCP) is an extension of the Intel386^TM microprocessor architecture
The combination of the Intel387 DX MCP with the Intel386^TM DX Microprocessor dramatically increases the
processing speed of computer application software which utilize mathematical operations This makes an ideal
computer workstation platform for applications such as financial modeling and spreadsheets CAD CAM or
graphics
The Intel387 DX Math CoProcessor adds over seventy mnemonics to the Intel386 DX Microprocessor instruc-
tion set Specific Intel387 DX MCP math operations include logarithmic arithmetic exponential and trigono-
metric functions The Intel387 DX MCP supports integer extended integer floating point and BCD data
formats and fully conforms to the ANSI IEEE floating point standard
The Intel387 DX Math CoProcessor is object code compatible with the Intel387 SX MCP and upward object
code compatible from the 80287 and 8087 math coprocessors Object code for Intel386 DX Intel387 DX is
also compatible with the Intel486^TM microprocessor The Intel387 DX MCP is manufactured on 1 micron
CHMOS IV technology and packaged in a 68-pin PGA package
Figure 0 1 Intel387^TM DX Math CoProcessor Block Diagram
240448 – 1
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changes to these specifications at any time without notice Microcomputer Products may have minor variations to this specification known as errata
March 1992
Order Number 240448-005
COPYRIGHT INTEL CORPORATION 1995
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