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Topic: Intel 8087

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Intel 80186

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Intel 8086

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	Molecular Expressions: Science, Optics & You - Olympus MIC-D: Integrated Circuit Gallery - Intel 8087 Math Coprocessor
		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.
	micro.magnet.fsu.edu /optics/olympusmicd/galleries/chips/intel8087.html (464 words)

	Intel 8087 - Wikipedia, the free encyclopedia
		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		The 8087, announced in 1980, was superseded by the 80287, 80387DX/SX and the 80487.
	en.wikipedia.org /wiki/Intel_8087 (321 words)

	Intel 8087 (Site not responding. Last check: )
		The Intel 8087 is a 16-bit floating-point math co-processor or FPU, first announced by Intel in 1980.
		It was designed to be used in conjunction with Intel's 8088 and 8086 CPUs, providing them with approximately 60 additional instructions for doing floating-point arithmetic.
		In software, the Intel mnenomics for the 8087 are written to begin with the letter 'F' (no normal 8086 mnemonics begin with 'F').
	bopedia.com /en/wikipedia/i/in/intel_8087.html (327 words)

	Intel 8086 - Wikipedia, the free encyclopedia
		The Intel 8088 (released shortly afterwards) was essentially the same chip, but with an external 8-bit data bus, allowing the use of cheap chipsets.
		The Intel 8087 was the standard version and used as a Math Co-processor operating on 80-bit numbers, but manufacturers like Weitek soon offered higher performance alternatives.
		The most influential microcomputer of all, the IBM PC, used the Intel 8088, a version of the 8086 with a narrower memory bus.
	en.wikipedia.org /wiki/Intel_8086 (580 words)

	Exploring the Intel 8087
		The 8087 Numeric Processor Extension or "Math Coprocessor" was developed by Intel to extend the capabilities of the 8088/8086 family of processor to include floating point arithmetic.
		Although the original 8087 is now of purely historic interest, its operation is compatible with all its more recent incarnations, including the Intel Pentium processors.
		In software, the Intel mnenomics for the 8087 are written to begin with the letter 'F' (no normal 8086 mnemonics begin with 'F').
	www.ee.unb.ca /tervo/ee6373/dos8087.htm (512 words)

	Intel 8086
		Shortly later the Intel 8088 was introduced with an external 8-bit bus, allowing the use of cheap chipsets.
		There were mathematical coprocessors for the 8086: the Intel 8087,...
		Intel bubble memory was on the market for a while, but faded away as better and cheaper memory technologies arrived.
	www.ebroadcast.com.au /lookup/encyclopedia/80/8086.html (593 words)

	The Free Information Society - Mathematical Coprocessors
		8087 and 287 coprocessors have a notch on one the shorter sides of their rectangular DIL package that should be matched with the notch of the coprocessor socket.
		For 8087, 287, and 387 coprocessors it is normal that the coprocessor does not go all the way in; about one millimeter (1/25 inch) of space is usually left between the socket and the bottom of the coprocessor chip.
		Intel 486DX The Intel 486DX is, of course, not solely a coprocessor.
	www.freeinfosociety.com /computers/coprocessors.html (13182 words)

	Computer Processor Information (CPU)
		INTEL 8080 - Microprocessor introduced in 1974 running at the speed of 2 MHz was used in the world's first PC, the Altair.
		INTEL 80286 (Code Name: P2) - Microprocessor introduced by Intel in 1982 which commonly is referred to as the 286 processor.
		INTEL PENTIUM II (Code Name: Klamath) - Initially the Pentium II 233MHz was released in 1997 and introduced a new physical architecture which encased a circuit board within a plastic case.
	www.computerhope.com /help/cpu.htm (1621 words)

	Chips.5u.com (Site not responding. Last check: )
		Intel's Ted Hoff felt differently; he was the first person to recognize that the new silicon-gated MOS technology might make a single-chip CPU (central processing unit) possible.
		In fact, Intel implemented an "s-spec" rating which is marked on each Pentium CPU which tells the owner some key data about the processor in order to make sure they have their motherboard set correctly.
		Intel also did some re-working of the P4's internal cache in order to nullify the effects of a mistake in branch prediction that can be a real lag with a 20-stage pipeline.
	www.chips.5u.com /idxhst.html (10116 words)

	Coprocessor - (Site not responding. Last check: )
		The 8087 was tightly integrated with the 8088 and responded to floating-point machine code operation codes inserted in the 8088 instruction stream.
		An 8088 processor without an 8087 would interpret these instructions as an internal interrupt, which could be directed to trap an error or to trigger emulation of the 8087 instructions in software.
		Intel released a cost-reduced processor, the 80486SX, that had no FP hardware, and also sold an 80487SX co-processor that essentially disabled the main processor when installed, since the 80487SX was a complete 80486DX with a different set of pin connections.
	psychcentral.com /psypsych/Coprocessor (896 words)

	Intel 8087: Facts and details from Encyclopedia Topic (Site not responding. Last check: )
		The 8087 was the first math coprocessor coprocessor quick summary:
		The intel 80286 is an x86-family 16-bit microprocessor that was introduced by intel on february 1, 1982....
		The pentium is a fifth-generation x86 architecture microprocessor by intel which first shipped on march 22, 1993....
	www.absoluteastronomy.com /encyclopedia/I/In/Intel_8087.htm (769 words)

	Intel 80186 microprocessor family
		Intel 80186 microprocessor, sometimes called i186, is an enhanced version of Intel 8086 16-bit processor.
		With the exception of integrated components, the Intel 80186 microprocessor is not very different from the 8086, and, because of this, the 80186 may be considered as an embedded version of 8086.
		Although the Intel 80186 was not widely used in the computers as the 8086 and 80286 did, it was successful in embedded processor market.
	www.cpu-world.com /CPUs/80186 (182 words)

	[No title] (Site not responding. Last check: )
		In considering Intel's motion, the district court weighed several factors relating to injunctive relief, including the likelihood of Intel's success on the merits, irreparable harm, the balance of hardships, and the public interest.
		Although Intel claims, as it must, that the 'C87 coprocessor infringes the '629 patent, it maintains that what was actually sold by HP under the foundry agreement was its fabrication services with an ancillary sale of wafers and chemicals.
		Intel does not dispute that HP was authorized under the broad terms of the licensing agreement to sell the [**11] chips at issue.
	www.mofo.com /mofo_dev/decisions/995f2d1566.html (6749 words)

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		Intel retains the right to make changes to these specifications at any time, without notice.
		The 8087 NPX for this processor family implemented a complete numeric processing environment in compliance with an early proposal for the IEEE 754 Floating-Point Standard.
		Like the 8087 and 80287 that preceded it, the 80387 is explicitly designed to deliver stable, accurate results when programmed using straightforward "pencil and paper" algorithms.
	www.ragestorm.net /downloads/387intel.txt (6025 words)

	Intel 80287 family
		Intel 80287 is a co-processor for 80286 family of processors, and it could also work with Intel 80386 microprocessors.
		The 80287 has architecture similar to Intel 8087, and it's completely object-code compatible with the 8087 (but not pin-compatible).
		The Intel 80287 was produced at speeds ranging from 5 to 12 MHz.
	www.cpu-world.com /CPUs/80287 (293 words)

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		Besides using the faster memory mapped interface to the CPU (the 80x87 uses IO-ports), it does not support many of the features of the 80x87 coprocessors, allowing all of the chip's resources to be concentrated on the fast execution of the basic arithmetic operations.
		For example, Intel rates the 33 MHz 386/387DX at 3290 kWhetstones/sec and 0.4 double-precision LINPACK MFLOPS [28,29], and it rates the Intel 486 at 12300 kWhetstones/sec and 1.6 double-precision LINPACK MFLOPS [30].
		Since the times are stated as the number of coprocessor clock cycles used, the faster 386 which can execute four clock cycles where the 80287 executes one clock cycle may decrease memory access times as seen by the coprocessor.
	www.getty.net /texts/coproces.txt (17103 words)

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