INTEL 8087 MICROPROCESSOR PDF

The Numeric Data Processor is a coprocessor that performs arithmetic and comparison operations on a variety of numeric data types; it also executes numerous built-in transcendental functions e. As a coprocessor to a maximum mode or , the NDP effectively extends the register and instruction sets of the host CPU and adds several new data types as well. The programmer generally does not perceive the as a separate device; instead, the computational capabilities of the CPU appear greatly expanded. These routines perform arithmetic and limited standard functions on single precision bit real numbers; an FPAL multiply executes in about 1. The accepts double precision bit operands as well as single precision numbers. The intent of the standard is to promote portability of numeric programs between computers and to provide a uniform programming environment that encourages the development of accurate, reliable software.

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Released in , the Intel is the math coprocessor designed to accompany the bit and microprocessors. The fits into a pin dual in-line package DIP socket that provides the chip with the same addressing and data handling capabilities as the CPU it matches. While the coprocessor can accept data from a bit bus, it also works without modification on the 8-bit bus of the , automatically adapting as necessary.

Three versions of the were produced. The original chip, the basic , was designed to operate at system clock speeds up to 5 MHz and was suitable without any modifications for IBM PCs and XTs and compatible personal computers. The clever architecture also accommodates the more advanced and processors.

Because the limitations of the 3. Instead, the useful and very marketable math functions were relegated to a separate element, which was eventually produced as a commercial product, the math coprocessor two years after the release of the Intel claimed it was the most complex large-scale integrated circuit commercially manufactured at the date of release.

The "i" silk-screened onto the ceramic package indicates that Intel produced the chip instead of one of its licensed manufacturers. Complex or not, the math coprocessor could not stand on its own and needed an or processor to function.

The designers retained the interfacing and control circuitry on the main processor. When the main microprocessor came across a numeric coprocessor command, the processor passed it onto the chip and told it which data to address. After the coprocessor calculated the answer, it passed the results back to or chip for further processing or display. Omar Alvarado , Thomas J. Fellers and Michael W.

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Image Use. Contact Us. Integrated Circuit Image Gallery Intel Math Coprocessor Released in , the Intel is the math coprocessor designed to accompany the bit and microprocessors.

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Intel 8087

Released in , the Intel is the math coprocessor designed to accompany the bit and microprocessors. The fits into a pin dual in-line package DIP socket that provides the chip with the same addressing and data handling capabilities as the CPU it matches. While the coprocessor can accept data from a bit bus, it also works without modification on the 8-bit bus of the , automatically adapting as necessary. Three versions of the were produced. The original chip, the basic , was designed to operate at system clock speeds up to 5 MHz and was suitable without any modifications for IBM PCs and XTs and compatible personal computers. The clever architecture also accommodates the more advanced and processors.

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8087 Numeric Data Processor

The Intel , announced in , was the first x87 floating-point coprocessor for the line of microprocessors. The purpose of the was to speed up computations for floating-point arithmetic, such as addition , subtraction , multiplication , division , and square root. It also computed transcendental functions such as exponential , logarithmic or trigonometric calculations, and besides floating-point it could also operate on large binary and decimal integers. The was an advanced IC for its time, pushing the limits of manufacturing technology of the period. Initial yields were extremely low.

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