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INTEL387TMDX Datasheet

  • INTEL387TMDX

  • Intel387TM DX MATH COPROCESSOR

  • 41頁

  • INTEL   INTEL

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Intel387
TM
DX
MATH COPROCESSOR
Y
High Performance 80-Bit Internal
Architecture
Implements ANSI IEEE Standard 754-
1985 for Binary Floating-Point
Arithmetic
Expands Intel386
TM
DX CPU Data
Types to Include 32- 64- 80-Bit
Floating Point 32- 64-Bit Integers and
18-Digit BCD Operands
Directly Extends Intel386
TM
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
Full-Range Transcendental Operations
for SINE COSINE TANGENT
ARCTANGENT and LOGARITHM
Built-In Exception Handling
Operates Independently of Real
Protected and Virtual-8086 Modes of
the Intel386
TM
DX Microprocessor
Eight 80-Bit Numeric Registers Usable
as Individually Addressable General
Registers or as a Register Stack
Available in 68-Pin PGA Package
One Version Supports 16 MHz 鈥?3 MHz
Speeds
(See Packaging Spec Order
231369)
Y
Y
Y
Y
Y
Y
Y
Y
Y
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
240448 鈥?
Figure 0 1 Intel387
TM
DX Math CoProcessor Block Diagram
Other brands and names are the property of their respective owners
Information in this document is provided in connection with Intel products Intel assumes no liability whatsoever including infringement of any patent or
copyright for sale and use of Intel products except as provided in Intel鈥檚 Terms and Conditions of Sale for such products Intel retains the right to make
changes to these specifications at any time without notice Microcomputer Products may have minor variations to this specification known as errata
March 1992
COPYRIGHT
INTEL CORPORATION 1995
Order Number 240448-005
1

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