INTEL387TMDX中文资料英特尔数据手册PDF规格书

Intel387™ DX MATH COPROCESSOR

The Intel387TM DX Math CoProcessor (MCP) is an extension of the Intel386TM microprocessor architecture. The combination of the Intel387 DX MCP with the Intel386TM 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 instruction set. Specific Intel387 DX MCP math operations include logarithmic, arithmetic, exponential, and trigonometric 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.

■ High Performance 80-Bit Internal Architecture

■ Implements ANSI/IEEE Standard 754- 1985 for Binary Floating-Point Arithmetic

■ Expands Intel386TM DX CPU Data Types to Include 32-, 64-, 80-Bit Floating Point, 32-, 64-Bit Integers and 18-Digit BCD Operands

■ Directly Extends Intel386TM DX CPU Instruction Set to Include Trigonometric, Logarithmic, Exponential and Arithmetic Instructions for All Data Types

■ 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 Intel386TM 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–33 MHz Speeds