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Encyclopedia > Intel 8087
Intel C8087 Math Coprocessor
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Intel C8087 Math Coprocessor

The 8087 was the first math coprocessor designed by Intel and it was built to be paired with the ass] microprocessors. The purpose of the 8087, the first of the x87 family, was to speed up computations on demanding applications involving floating point mathematics. The performance enhancements went from 20% to 500% depending on the specific application. Image File history File links Intel_C8087. ... Image File history File links Intel_C8087. ... A coprocessor is a computer processor used to supplement the functions of the primary processor (the CPU). ... Intel Corporation (NASDAQ: INTC, SEHK: 4335), founded in 1968 as Integrated Electronics Corporation, is a U.S.-based multinational corporation that is best known for designing and manufacturing microprocessors and specialized integrated circuits. ... A floating-point number is a digital representation for a number in a certain subset of the rational numbers, and is often used to approximate an arbitrary real number on a computer. ...


This coprocessor introduced about 60 new instructions available to the programmer, all beginning with "F" to differentiate them from the standard 8086/88 integer math instructions. For example, in constrast to ADD/MUL, the 8087 provided FADD/FMUL.


The 8087 (and, in fact, the entire x87 family) does not provide a freely, linear register set such as the AX/BX/CX/DX registers of the 8086/88 and 80286 processors -- the x87 registers are structured in some form of stack (although it is not exactly like a typical stack data structure) ranging from ST0 to ST7. The floating point instructions of the 80x87 coprocessors operate popping and pushing values onto this stack. In computer architecture, a processor register is a small amount of very fast computer memory used to speed the execution of computer programs by providing quick access to commonly used values—typically, the values being in the midst of a calculation at a given point in time. ... The Intel 80286 is an x86-family 16-bit microprocessor that was introduced by Intel on February 1, 1982. ... In computer science, a call stack is a special stack which stores information about the active subroutines of a computer program. ... In computer science, a stack is a data structure that works on the principle of Last In First Out (LIFO). ...


When Intel designed the 8087 it aimed to make a standard floating point format for future designs. In fact, one of the most successful things from a historical perspective of this coprocessor was the introduction of the first floating point standard for the x86 PCs: the IEEE 754. The 8087 provided two basic 32/64-bit floating point data types and an additional extended 80-bit internal support to improve accuracy over large and complex calculations. Apart from this, the 8087 offered an 80-bit/17-digit packed BCD (binary coded decimal) format and 16,32 and 64-bit integer data types. The IEEE Standard for Binary Floating-Point Arithmetic (IEEE 754) is the most widely-used standard for floating-point computation, and is followed by many CPU and FPU implementations. ... Binary-coded decimal (BCD) is a numeral system used in computing and in electronics systems. ...


The 8087, announced in 1980, was superseded by the 80287, 80387DX/SX and the 80487. Intel 80486DX, Pentium and later processors include a built-in coprocessor on the CPU core. The Intel 80287 (287) was the math coprocessor for the Intel 80286 series of microprocessors. ... The Intel 80387 (387) was the math coprocessor for the Intel 80386 series of microprocessors. ... The Intel 80487, or 487 (i487), was the math coprocessor for the Intel 486SX chips. ... The Intel 80486DX is a microprocessor made by Intel x86 family of processors. ... Pentium logo, with MMX enhancement The Pentium is a fifth-generation x86 architecture microprocessor by Intel. ...


External links

  • Intel 80x87 math coprocessors at cpu-collection.de


List of Intel microprocessors | List of Intel CPU slots, sockets

Intel processors This generational and chronological list of Intel microprocessors attempts to present all of Intels processors (µPs) from the pioneering 4-bit 4004 (1971) to the present high-end offerings, the 64-bit Itanium 2 (2002) and Pentium 4F with EM64T (2004). ... Here is a list of sockets and slots used by Intel central processing units: 80486: 486 Socket Socket 1 Socket 2 Socket 3 Socket 6 Pentium: Socket 4 Socket 5 Socket 7 Pentium Pro: Socket 8 Pentium II: Slot 1 Pentium III: Slot 1 Socket 370 Pentium 4: Socket 423...


4004 | 4040 | 8008 | 8080 | 8085 | 8086 | 8088 | iAPX 432 | 80186 | 80188 | 80286 | 80386 | 80486 | i860 | i960 | Pentium | Pentium Pro | Pentium II | Celeron | Pentium III | XScale | Pentium 4 | Pentium M | Pentium D | Pentium Extreme Edition | Xeon | Core | Core 2 | Itanium | Itanium 2   (italics indicate non-x86 processors) Intel C4004 microprocessor. ... Intel D4040 Microprocessor The Intel 4040 was the successor to the Intel 4004. ... Intel 8008 The Intel 8008 was an early microprocessor designed and manufactured by Intel and introduced in April, 1972. ... Intel C8080A processor. ... Intel 8085AH The Intel 8085 was an 8-bit microprocessor made by Intel in the mid-1970s. ... An Intel 8086 Microprocessor The 8086 is a 16-bit microprocessor chip designed by Intel in 1978, which gave rise to the x86 architecture. ... An Intel 8088 microprocessor The Intel 8088 is an Intel microprocessor based on the 8086, with 16-bit registers and an 8-bit external data bus. ... The Intel iAPX 432 was Intels first 32-bit microprocessor design, introduced in 1981 as a set of three integrated circuits. ... An Intel 80186 Microprocessor The 80186 architecture. ... The Intel 80188 is a version of the Intel 80186 microprocessor with an 8 bit external data bus, instead of 16 bit. ... An Intel 80286 Microprocessor AMD 80286 with 12 Mhz. ... An Intel 80386 Microprocessor. ... The exposed die of an Intel 80486DX2 microprocessor. ... The Intel i860 (also 80860, and code named N10) was a RISC microprocessor from Intel, first released in 1989. ... Intels i960 (or 80960) was a RISC-based microprocessor design that became quite popular during the early 1990s as an embedded microcontroller, for some time likely the best-selling CPU in that field, pushing the AMD 29000 from that spot. ... Pentium logo, with MMX enhancement The Pentium is a fifth-generation x86 architecture microprocessor by Intel. ... Pentium Pro 256 KB Pentium Pro 512 KB Pentium Pro 1 MB Pentium Pro underside (256/512) Pentium II Overdrive The Pentium Pro is a sixth-generation x86 architecture microprocessor (P6 core) by Intel originally intended to replace the original Pentium in a full range of applications, but later reduced... Pentium II – front view The Pentium II is an x86 architecture microprocessor by Intel, introduced on May 7, 1997. ... Celeron D logo as of 2006. ... Pentium III logo The Pentium III is an x86 (more precisely, an i686) architecture microprocessor by Intel, introduced on February 26, 1999. ... The factual accuracy of this article is disputed. ... New Intel Pentium 4 with Hyper Threading logo The Pentium 4 is a seventh-generation x86 architecture microprocessor produced by Intel and is their first all-new CPU design, called the NetBurst architecture, since the Pentium Pro of 1995. ... Introduced in March 2003, the Pentium M is an x86 architecture microprocessor designed and manufactured by Intel. ... Pentium D logo as of 2006. ... Pentium Extreme Edition brand logo // Smithfield Pentium Extreme Edition is the brand name given to a series of Intel microprocessors introduced during the 2nd Quarter 2005 Intel Developers Forum, not to be confused with the Pentium 4 Extreme Edition (an earlier, single-core processor occupying the same niche). ... Xeon logo The Xeon is Intels name for its server-class PC microprocessors intended for multiple-processor machines. ... Intel Core is a new platform umbrella intended to replace the Pentium M brand. ... Intel Core 2 Duo brand logo This article is about Intel processors branded as Intel Core 2. ... Itanium brand logo The Intel Itanium processor. ... Itanium 2 logo The Itanium 2 is the successor of the first Itanium processor and is an IA-64 architecture microprocessor. ... x86 or 80x86 is the generic name of a microprocessor architecture first developed and manufactured by Intel. ...

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  Results from FactBites:
 
Molecular Expressions: Science, Optics & You - Olympus MIC-D: Integrated Circuit Gallery - Intel 8087 Math Coprocessor (464 words)
Released in 1980, the Intel 8087 is the math coprocessor designed to accompany the 16-bit 8086 and 8088 microprocessors.
Because the limitations of the 1980 3.0-micron technology were pressed to the limit by the tens of thousands of transistors and complex circuitry of the 8086 and 8088, it was practical for semiconductor manufacturers to omit the advanced math functions from the 8086 and 8088 designs.
Intel claimed it was the most complex large-scale integrated circuit commercially manufactured at the date of release.
Intel 8087 - Wikipedia, the free encyclopedia (321 words)
The purpose of the 8087, the first of the x87 family, was to speed up computations on demanding applications involving floating point mathematics.
The 8087 (and, in fact, the entire x87 family) does not provide a freely, linear register set such as the AX/BX/CX/DX registers of the 8086/88 and 80286 processors -- the x87 registers are structured in some form of stack (although it is not exactly like a typical stack data structure) ranging from ST0 to ST7.
The 8087, announced in 1980, was superseded by the 80287, 80387DX/SX and the 80487.
  More results at FactBites »


 

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