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參數資料
| 型號： | intel i387 |
| 廠商： | Intel Corp. |
| 英文描述： | Military I387 Math Coprocessor(軍用I387數學協處理器) |
| 中文描述： | 軍事I387數學協處理器（軍用I387數學協處理器） |
| 文件頁數： | 1/41頁 |
| 文件大小： | 457K |
| 代理商： | INTEL I387 |
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December 1992
Order Number: 271074-006
MILITARY i387
TM
MATH COPROCESSOR
Y
High Performance 80-Bit Internal
Architecture
Y
Implements ANSI/IEEE Standard 754-
1985 for Binary Floating-Point
Arithmetic
Y
Five to Seven Times M8087/M80287
Performance
Y
Upward Object-Code Compatible from
M8087 and M80287
Y
Expands i386
TM
Microprocessor Data
Types to Include 32-, 64-, 80-Bit
Floating Point, 32-, 64-Bit Integers and
18-Digit BCD Operands
Y
Directly Extends i386 Processor
Instruction Set to Include
Trigonometric, Logarithmic,
Exponential and Arithmetic Instructions
for All Data Types
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 i386 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 and
68-Lead Ceramic Quad Flat Pack
(See Packaging Spec: Order
Y
231369)
Y
Available in Three Product Grades:
D MIL-STD-883,
b
55
§
C to
a
125
§
C (T
C
)
D Military Temperature Only,
b
55
§
C to
a
125
§
C (T
C
)
D Extended Temperature,
b
40
§
C to
a
110
§
C (T
C
)
The Intel i387 is a high-performance numerics processor extension that extends the i386 microprocessor
architecture with floating point, extended integer and BCD data types. The i386/i387 processors’ computing
system fully conforms to the ANSI/IEEE floating-point standard. Using a numerics oriented architecture, the
i387 processor adds over seventy mnemonics to the i386/i387 processor instruction set, making the i386/i387
processor a complete solution for high-performance numerics processing. The i387 microprocessor is imple-
mented with 1.5 micron, high-speed CHMOS technology and packaged in a 68-pin ceramic pin grid array
(PGA) package and a 68-pin ceramic quad flat pack package. The i386/i387 processor combination is upward
object-code compatible from the i386/80287, 80286/80287 and 8086/8087 computing systems.
271074–1
Figure 0.1. i387
TM
Math Coprocessor Block Diagram
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