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Topic: Coprocessor

	Coprocessor - Wikipedia, the free encyclopedia
		Operations performed by the coprocessor may be floating point arithmetic, graphics, signal processing, string processing, or encryption.
		Coprocessors were first seen on mainframe computers, where they added additional "optional" functionality such as floating point math support.
		Another coprocessor which was released as addon for a 8086/8088 was 8089 input/output coprocessor.
	en.wikipedia.org /wiki/Coprocessor (1040 words)

	The Math Coprocessor - PC ComputerNotes
		The Math Coprocessor is a second processor in your computer that does nothing but number crunching for the system.
		The advantage was recognized right from the beginning, and most of these motherboards had an empty slot for the aftermarket addition of a coprocessor.
		The number (or name) of the math coprocessor followed the CPU's numbering sequence, only the last digit would be a '7', not a '6'.
	www.pccomputernotes.com /coprocessors/coprocessor.htm (340 words)

	Arrick Robotics --- ARobot Coprocessor App Note
		A coprocessor is one of the most powerful expansions that can be done because it can remove time consuming tasks from the master processor, leaving it for higher level routines.
		The coprocessor could be used to add a ring of sonar range finders, read a time consuming compass or GPS, process video images, etc. ARobot’s controller board already has one coprocessor that handles DC motor and RC servo motor control.
		The new coprocessor and associated circuitry can be mounted on a breadboard like the picture shows, or soldered to a perf board.
	www.robotics.com /arobot/co.html (931 words)

	coprocessor - a definition from Whatis.com
		A coprocessor is a special set of circuits in a microprocessor chip that is designed to manipulate numbers or perform some other specialized function more quickly than the basic microprocessor circuits could perform the same task.
		A coprocessor offloads specialized processing operations, thereby reducing the burden on the basic microprocessor circuitry and allowing it to work at optimum speed.
		Coprocessors of this type make it possible to customize the various models in a line of personal or business computers.
	whatis.techtarget.com /definition/0,,sid9_gci1146711,00.html (233 words)

	Keystroke Emulator for Coprocessor
		In the coprocessor environment, the keyboard must be controlled by the MP so that there is no direct connection between the real keyboard and the integrated support chip.
		In prior coprocessors, MP had to emulate a keyboard interrupt and then wait for an interrupt to occur as the coprocessor tried to read the keyboard.
		In the new coprocessor, if the scan code belongs to the coprocessor, MP will perform a table lookup using the scan code as a table index and then write the converted scan code to a special I/O port on the coprocessor.
	www.priorartdatabase.com /IPCOM/000038657 (539 words)

	F21 Analog I/O Coprocessor
		The Analog Coprocessor on F21 is a simple and fast device for reading and/or writing Analog samples on the F21 Ai and Ao pins.
		The sample rate of the F21 Analog Coprocessor is controled by the external clock oscilator signal and an internal count down control register.
		If they were not in the same word the coprocessor would latch the address of the next CPU instruction as it would be the next value on the bus.
	www.ultratechnology.com /f21ana.html (1612 words)

	Coprocessor - Search Results - MSN Encarta
		Coprocessor, in computer science, a processor, distinct from the main microprocessor, that performs additional functions or assists the main...
		Floating-Point Processor, in computer science, also called a numeric coprocessor, a math coprocessor, and a floating-point unit.
		floating-point processor, overview, Intel coprocessor 80287, Intel coprocessor 80387, Intel coprocessor 80387SX, Intel coprocessor 8087, Motorola...
	ca.encarta.msn.com /Coprocessor.html (78 words)

	Olympus MIC-D: Integrated Circuit Gallery - Intel 387 Math Coprocessor
		Released in 1987, the i387 math coprocessor was designed to match the 386 microprocessor logically and physically just as the 80287 coprocessor complemented the 286 and the 8087 accompanied the 8086 and 8088 processors.
		Much of the coprocessor's design was carried over into the floating-point section of the 486 microprocessor that was engineered basically as a 387 and 386 integrated onto a single silicon wafer.
		Although it had the capability to run asynchronously, a 387 generally operated at the same clock speed as the 386 it was assisting.
	www.olympusmicro.com /micd/galleries/chips/intel387.html (378 words)

	F21 Serial/Network I/O Coprocessor Specifications
		The contents of two registers in the serial/network coprocessor are compared to the contents of all data that passes through serial/network coprocessor.
		Whenever a SOM pattern is seen the serial/network coprocessor begins a DMA tranfer to or from memory using the address in the serial/network address register which has previously been set by the CPU.
		The serial/network coprocessor on the F21 is a hardware device designed to provide hardware support for Direct Memory Access transfers and remote CPU interrupts in an F21 multiprocessor.
	www.ultratechnology.com /f21net.html (2428 words)

	The IBM PCIXCC: A new cryptographic coprocessor for the IBM eServer
		For a cryptographic coprocessor to be valuable, one must be able to obtain it for a server.
		As a secure programmable coprocessor, internal software is used to orchestrate the cryptographic operations and to handle parameter checking, data formatting, and part of the communications control.
		The initialization PCICC stands for PCI cryptographic coprocessor, as opposed to the new PCIXCC, which is the PCI-X cryptographic coprocessor.
	www.research.ibm.com /journal/rd/483/arnold.html (7658 words)

	Increasing System Security by Using the DS5250 as a Secure Coprocessor - Maxim/Dallas
		This memory protection allows the secure coprocessor, and the application as a whole, to function as a trusted witness in secure transactions.
		The secure coprocessor is responsible for performing secure communications, as well as protecting critical information such as encryption keys, PINs and passwords against theft.
		In this way the tamper resistance of the secure coprocessor can be extended to the entire application, and protect the general-purpose processor as well as the secure coprocessor.
	www.maxim-ic.com /appnotes.cfm?an_pk=3294 (2038 words)

	Dedicated Coprocessor Eases Developing Embedded Graphical User Interfaces \| RTC Magazine
		Because these static objects are stored in the GUI coprocessor’s memory, their use requires no communication between the host processor and the GUI coprocessor.
		The host processor only needs to provide the GUI coprocessor with the physical data via a memory write command and the GUI executive will update the visual appearance of the appropriate object(s) to reflect the change.
		Depending upon the action associated with the control widget, the host processor may, or may not, need to be informed by the GUI coprocessor of the action.
	www.rtcmagazine.com /home/printthis.php?id=100289 (1651 words)

	QB Program Can Hang if Coprocessor Switch Is Set Incorrectly
		QuickBasic version 4.0 loads and runs on a standard IBM PC even when the coprocessor switch on the PC motherboard is incorrectly set to indicate the presence of a math coprocessor when one is not actually present.
		Another possibility is that the installed coprocessor incorrectly has a speed (megahertz) rating faster than the CPU (central processing unit) -- the coprocessor's speed must be equal to or less than the speed of the CPU.
		According to one customer, his original IBM documentation listed the coprocessor switch as unused, and two of his machines came from IBM with the switches set in what is now considered the incorrect position.
	support.microsoft.com /kb/32098 (451 words)

	IBM Research \| Press Resources \| IBM Research Demonstrates Linux Running on Secure Cryptographic Coprocessor
		Its specialized cryptographic electronics, along with a microprocessor, memory and random number generator are housed within a tamper-responding environment to provide a highly secure subsystem in which data processing and cryptography can be performed.
		IBM Research developed the 4758 coprocessor hardware, along with its internal operating system, secure configuration and bootstrap software, and custom software development tools that can run on multiple platforms, including all IBM servers and non-IBM servers, about five years ago.
		The 4758 secure coprocessor was the first device ever to earn the highest possible certification for commercial security granted by the U.S. Department of Commerce's National Institute of Standards (NIST) and the Communications Security Establishment (CSE) of the Government of Canada.
	domino.research.ibm.com /comm/pr.nsf/pages/news.20010828_mycroft.html (383 words)

	Dr. Dobb's \| A Coprocessor for a Coprocessor? \| July 22, 2001 (Site not responding. Last check: 2007-11-03)
		The coprocessors boosted performance by a factor between 20 and 30 for both the TI and Intel chips.
		In the TI case, when a coprocessor instruction opcode is detected by the 34020, the 34020 initiates a special coprocessor bus cycle to which the 34082 responds.
		In comparing the performance of these coprocessors, we should note that the move/load/store functions of the 80387 devices create a significant overhead (20 to 93 cycles) which is negligible in the 34082.
	www.ddj.com /184408544?pgno=4 (7426 words)

	How to test the numeric coprocessor flags after fl (Site not responding. Last check: 2007-11-03)
		The flags of the coprocessor are independent of the the normal register flags.
		Here is some code that will move the coprocessor flags into the normal flags, to allow instruction like JG after floating point arithmetic.
		fsub [float2] ;this subtracts float2 from what is on the top of ;the coprocessor stack ftst ;this tests the last float operation and sets the cc ;bit in the coprocessor flags.
	community.borland.com /article/15881 (331 words)

	Floating point & the numeric coprocessor
		The numeric coprocessor has eight 80 bit floating point registers arranged in a stack.
		The first "dump_stack" shows all these values on the stack The numeric coprocessor stack is displayed by "dump_math" and shows values consistent with the comment in the code.
		The next lines of debugging code put the address of root1 into eax, display the registers (so we can see what value has been put in eax) and display a section of memory containing root1.
	www.markhdesign.co.uk /nasmchronicle/p11.asp (822 words)

	Coprocessor Basics
		The registers in the coprocessor stack always contain 80-bit extended precision data.
		An instruction that transfers data between the coprocessor and the AX register.
		Should be used before the microprocessor accesses memory data that are affected by the coprocessor.
	www.cs.umbc.edu /~plusquel/310/slides/assem_fp.html (616 words)

	Endace \| Products > Network Monitoring Cards > Coprocessor [Software Accelerator] (Site not responding. Last check: 2007-11-03)
		The Endace DAG Coprocessor is an optional data-processing tool for use with Endace DAG cards equipped with a suitable expansion connector.
		The basic DAG capabilities (full line-rate data acquisition and generation) may be expanded to include one of several data-processing applications performed by the coprocessor.
		Coprocessor applications are intended for use in either stand-alone fashion – for example, when implementing ATM SAR – or closely coupled with software running on the host computer –; such as IDS and firewalls.
	www.endace.com /dagCoPro.htm (272 words)

	CryptoCards (Site not responding. Last check: 2007-11-03)
		The IBM 4758 PCI Cryptographic Coprocessor is a high security, programmable PCI board.
		Specialized cryptographic electronics, micro-processor, memory, and random number generator housed within a tamper-responding environment provide a highly secure subsystem in which data processing and cryptography can be performed.
		Note: The IBM 4758 PCI Cryptographic Coprocessor is available for iSeries, pSeries and xSeries machines, older zSeries servers, and in general for Intel-based machines running Windows 2000.
	www-3.ibm.com /security/cryptocards (304 words)

	Coprocessor
		And there's documented interface to coprocessor, but I've got some probs with it.
		The mathematical coprocessor on this board is external to the C167 microcontroller.
		I just thought that it's a common approach to hardwire a coprocessor to 16x controllers and that they have common interface.
	www.keil.com /forum/docs/thread2541.asp (552 words)

	Applications and the Math Coprocessor Under Windows
		When an application for Microsoft Windows is run on a machine with a math coprocessor, the application can use inline floating-point instructions to take the fullest advantage of the hardware.
		If no coprocessor is available at run time, code in the emulator library evaluates floating-point expressions.
		An application compiled for the MS-DOS environment with the -FPi option checks for the coprocessor at run time and modifies its code accordingly: if there is a coprocessor, it uses inline floating-point instructions; if there is no coprocessor, it calls software routines to emulate the coprocessor.
	support.microsoft.com /kb/43276 (284 words)

	What is coprocessor? - A Word Definition From the Webopedia Computer Dictionary
		Note, however, that the program itself must be written to take advantage of the coprocessor.
		If the program contains no coprocessor instructions, the coprocessor will never be utilized.
		In addition to math coprocessors, there are also graphics coprocessors for manipulating graphic images.
	www.webopedia.com /TERM/C/coprocessor.html (110 words)

	Cryptographic Coprocessor delivers security-rich solution Product News Network - Find Articles (Site not responding. Last check: 2007-11-03)
		Coprocessor delivers RSA algorithm-based digital signature generation and verification with keys up to 2,048 bits in length.
		The 4764 Model 001 PCI-X Cryptographic Coprocessor is a security-rich coprocessor with specialized electronics to support cryptographic functions for PCI-X bus IBM xSeries 226 server.
		The 4764 Model 001 PCI-X Cryptographic Coprocessor is designed to provide security-rich features and delivers high throughput for cryptographic functions on the IBM xSeries[R] 226 server.
	www.findarticles.com /p/articles/mi_m0PIL/is_2005_Oct_26/ai_n15736286 (410 words)

	CITI: Projects : IBM 4758 Secure Coprocessor
		The IBM 4758 is a secure coprocessor that provides a tamper-sensing and responding secure computing environment on a PCI card.
		It includes hardware support for DES encryption, random number generation and modular math operations to speed up RSA.
		Applications written for the IBM 4758 secure coprocessor on Linux should port trivially.
	www.citi.umich.edu /projects/ibm4758.html (65 words)

	coprocessor from FOLDOC (Site not responding. Last check: 2007-11-03)
		Any computer processor which assists the main processor (the "CPU") by performing certain special functions, usually much faster than the main processor could perform them in software.
		The coprocessor often decodes instructions in parallel with the main processor and executes only those instructions intended for it.
		The most common example is a floating point coprocessor (or "FPU"), others are graphics and networking.
	www.instantweb.com /foldoc/foldoc.cgi?coprocessor (94 words)

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