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	The most common bus in the PC world, ISA stands for Industry Standard Architecture, and unlike many uses of the word ...
		Importantly, while this bus provided significant enhancements to the original XT bus architecture, it retained backward compatibility with the original XT bus allowing old cards to be used in ATs using the new bus which was retrospectively described as ISA (Industry Standard Architecture).
		The bus mastering was not a complete or perfect implementation due to certain limitations such as a request by a Bus master for 'Bus hand-off' requiring several cycles for completion and the master having to relinquish the bus periodically to allow memory refresh (or do the refresh itself).
		This duplication was necessary because the address lines on the XT bus were latched (the address signals were tied to flip-flops which maintained the address lines logic level until explicitly set to a different value) and this latching process caused propagation delays that would slow down peripheral boards.
	www.faculty.iu-bremen.de /birk/lectures/PC101-2003/10bus/site/isa.htm (775 words)

	An illustrated Guide to I/O-buses
		The internal ISA bus, which is used on the simple ports, like keyboard, diskette drive, serial and parallel ports.
		As described, the ISA bus is quite outdated and should not be used in modern pcs.
		Like ISA, the bus bus is synchronous with the CPU at a clock frequency reduced to a fraction of the system bus clock frequency.
	www.karbosguide.com /hardware/module2c2.htm (1020 words)

	PC bus systems
		Bus masters are devices capable of initiating any bus cycle (memory read/write, port addressing, etc.) and bus slaves are devices which are not capable of initiating a bus cycle but merely responding to it.
		Bus speeds of up to 66MHz are supported but the electrical characteristics of the physical VL-bus connector limit the speed of devices operating across the connector to 50MHz (slotless devices such as integrated graphics devices would presumably not suffer from this limitation).
		ISA was the next generation of PC bus and represented a predefined (albeit loosely) bus scheme that was designed to be used in the PC, rather than being adapted for use from another system.
	www.csn.ul.ie /~stephen/buses.html (7161 words)

	The I/O Bus
		Although the ISA bus may be ten years old, it remains a perfectly reasonable option for devices that do not require highest performance.
		The ISA bus interface is simple and cheap, but it requires the user to set the IRQ, either with physical switches on the card or through some kind of setup configuration utility.
		When the device is ready for more data, it uses one bus cycle to send a request to the DMA chip, the chip then substitutes for the CPU in generating the next buffer address to the memory circuits to fetch the next chunk of data for the device.
	sophia.dtp.fmph.uniba.sk /pchardware/bus.html (3749 words)

	isa_bus description
		The data bus is driven by a bidirectional buffer that is only enabled at times corresponding to data availability (iowc/, iorc/, memw/, memr).
		It is not needed for bus decoding since the address lines are already demultiplexed on the ISA bus.
		Any IO device interfaced to the PC bus must decode an address, decide whether the address is originating from the host processor or a DMA device, determine the direction of data transfer and, if appropriate, either accept data or provide data at the proper time.
	ece.wpi.edu /~wrm/Courses/EE3803/Labs/isa (836 words)

	Quatech \| ISA Bus Overview
		This XT bus was completely under the microprocessor's direct control, and its addressing width was limited to the 8-bit level of the processor.
		However, the ISA bus has come a long way since 1981, and its modern incarnation is much better suited to the PCs we use today and the applications we run on them.
		This "modern" ISA bus emerged in 1984 when it became clear to IBM developers that the advances made on the processor front had rendered the XT bus archaic.
	www.quatech.com /support/comm-over-isa.php (1001 words)

	Writing EISA and ISA Bus Device Drivers
		Devices on the ISA bus have a unique slot number, but the addresses used to communicate with the device are not affected by it.
		The EISA bus is a 32-bit address and 32-bit data bus with support for 8-, 16-, 24-, and 32-bit bus cycles.
		For the ISA bus, assignment of the memory address space is done through the use of the ISA configuration (ISACFG) utility.
	www.rcnp.osaka-u.ac.jp /unix/DOCUMENTATION/HTML/AA-Q0R6C-TET1_html/eisabus3.html (1299 words)

	Information about the computer BUS
		A computer bus is a method of transmitting data from one part of the computer to another part of the computer.
		When this bus was originally released it was a proprietary bus, which allowed only IBM to create peripherals and the actual interface.
		VLB 2.0 was later released in 1994 and had a 64-bit bus and a bus speed of 50 MHz.
	www.computerhope.com /help/bus.htm (1086 words)

	' + pPage + '
		This bus is either a part of the processor bus itself, or in most cases is implemented separately by a dedicated chipset that is responsible for transferring information between the processor bus and the memory bus.
		ISA, which is an acronym for Industry Standard Architecture, is the bus architecture that was introduced as an 8-bit bus with the original IBM PC in 1981 and later expanded to 16 bits with the IBM PC/AT in 1984.
		The PCI bus specification, released in June 1992 and updated in April 1993, redesigned the traditional PC bus by inserting another bus between the CPU and the native I/O bus by means of bridges.
	cma.zdnet.com /book/upgraderepair/ch05/ch05.htm (11750 words)

	ISA bus ðàñïèíîâêà @ pinouts.ru
		The address on the SA bus is valid from the falling edge of BALE to the end of the bus cycle.
		Unlike the SA bus, the LA bus is not latched, and is not valid for the entire transfer cycle (on most computers).
		On the ISA bus, the DMAC is programmed to use fixed priority (channel 0 always has the highest priority), which means that channel 0-4 from the slave have the highest priority (since they connect to the master channel 0), followed by channels 5-7 (which are channel 1-3 on the master).
	pinouts.ru /data/ISA.shtml (4136 words)

	Data Structures for EISA/ISA Bus Device Drivers
		Data structures are the mechanism used to pass information between the Digital UNIX kernel and device driver interfaces.
		ISA bus device drivers do not use this member.
		For the ISA bus, this member specifies a string that matches the ISA configuration (ISACFG) handle.
	h30097.www3.hp.com /docs/base_doc/DOCUMENTATION/HTML/AA-Q0R6C-TET1_html/eisabus5.html (1230 words)

	PC KITS-tutorial page (ISA BUS)
		On the contrary the ISA BUS outputs a 20 bit address bus and a 8 bit data BUS.
		The basic target of an interrupt is to execute a function that response to the request of a hardware device.
		The DMA (Direct Memory Access) controller borrows the address bus, the data bus and the control bus from the system and transfers a programmed series of bytes from a fast I/O device to the memory.
	www.ctv.es /pckits/tISA.html (1206 words)

	ISA.HTM
		ISAIX16 is a Bus Isolation Extender that allows user to test the 16 bit ISA add-on boards quickly without having to power the system down each time.
		It features 5 ISA slots, which can be ordered in many combinations, for example -3A2B means 3 slots on A-side and 2 slots on B-side; -3B2A means 3 slots on B-side and 2 slots on A-side.
		ISAF-01- ISA Flip Riser Card (right angle or straight), the connector on the top is rotated 180 degree relative to the gold fingers, Rev-01.
	www.adexelec.com /isa.htm (378 words)

	Writing EISA and ISA Bus Device Drivers
		During hardware autoconfiguration, both EISA and ISA bus device drivers perform bus-specific operations to determine whether the controller is attached to the system.
		EISA bus controllers must have an ID register that the EISA bus configuration code can use to ensure that the controller is present on the system.
		Contains information about the bus memory characteristics, such as the type of memory (read-only or random access), the number of address lines used, and the size of a block of memory.
	h30097.www3.hp.com /docs/dev_doc/DOCUMENTATION/HTML/AQ0R6DTE/DOCU_003.HTM (1814 words)

	ISA Bus
		PC bus boards usually are furnished with software and drivers that allow them to be used directly and from within custom Visual Basic, C, C++, or Delphi programs.
		ISA bus boards are not "Plug and Play." That is, you open the PC, determine what I/O ports and IRQs are available, and configure the board to match these available resources before inserting it and using it.
		This manual "fiddling" can be tricky, and the 16-bit ISA bus has more limited performance than the 32-bit PCI bus.
	www.mvps.org /rgrier/isabus.htm (533 words)

	ISA Bus
		The ISA bus is the standard (slow) I/O bus still used in virtually all PCs today for low-bandwidth peripherals such as modems.
		Due to the limitations of the ISA bus, they are extremely slow by today's standards, and not suited to the use of a graphical operating system like Windows.
		While it is possible that a high-end ISA card can be a decent performer if it has an advanced set of on-board acceleration features, in practice even a cheap PCI video card will generally outperform even a good ISA card, and by a lot.
	www.pcguide.com /ref/video/ifISA-c.html (379 words)

	ISA Active Bus Extender (Site not responding. Last check: 2007-11-06)
		This is a Hot Swap ISA extender as well as the controller for the PCIAX type extender cards.
		As an ISA Hot Swap extender card it controls the On-Off of the voltages and the signals to the UUT, and is capable of measuring system voltages and the UUT voltages and currents.
		ISA Bus Active Extender with on-board digital and analog I/O.
	www.twinhunter.com /Products/ISA/ISA160.html (440 words)

	PC104 to ISA Adapter - PCM-ISA-16
		The PCM-ISA is a low cost adapter that links the PC/104 bus to ISA bus boards.
		Bus Architecture - The PC/104 Bus is a compact, embedded version of the ISA bus.
		ISA Bus Backplane - A 2-slot, two layer passive back-plane accommodates 8 or 16-bit PC Bus cards.
	pc104.winsystems.com /products/pc104/pcmisa.html (339 words)

	Sensoray STD to ISA Bus Adapter
		The 422 is a bus-to-bus adapter that extends the ISA bus of a PC to a card rack of STD bus I/O boards.
		It has three parts: an ISA board, and STD board, and a set of flat cables to connect the two boards.
		All STD bus I/O boards are mapped into a 256-address window in the ISA I/O space.
	www.sensoray.com /html/422data.htm (225 words)

	PC ISA Bus Quadrature Encoder Card
		One possible (and common) confusing point with ISA bus circuits is the use of the prefix "A".
		The ISA pins a24, a25 and a26 serve as its three inputs and depending on their values, will yield one 8 possible outputs.
		This is shown in the schematic where pin 2 on the 7266 is wired to the ISA bus at b30.
	www.boondog.com /tutorials/7266/7266.htm (2010 words)

	ACCES - PCI-ISA Bus Expansion Kit Page
		ACCES's PCI to ISA Bus Expansion Interconnect Kit, model PCI-ISA, allows you to expand your PCI Personal Computer system without timing or noise problems.
		It provides hardware transparent, active bus extension and conversion between a host computer’s PCI slot and a remote expansion chassis’ ISA backplane.
		The kit is ideal if you have existing software for an application and buy a new computer with no ISA slots to duplicate the system, as long as your ISA cards do not use DMA or Bus Mastering.
	www.acces-usa.com /go.cgi?p=../bus_exp/pci-isa.html (376 words)

	applicom cards on ISA bus (Site not responding. Last check: 2007-11-06)
		ISA cards sales for technical support (replacement) or maintenance purpose.
		Effective November 08th 04, applicom cards with ISA bus factor will be discontinued.
		Note: The alternative interface cards are ALL based on PCI 5V or Universal PCI (3.3 and 5V) bus form factor, and may require minor or major changes in your application.
	www.applicom-int.com /us/products/applicom/isa.htm (446 words)

	AMIDiag - Industry Standard PC Diagnostics
		This is a bus that connects all the internal computer components to the CPU and main memory.
		On PCs, the old ISA bus is being replaced by faster buses such as PCI.
		Instead, a new technology called local bus (PCI) is being used in combination with the old ISA bus.
	www.amidiag.com /support/glossary.cfm (11660 words)

	ISA to ISA Bus Expander Card Set (Site not responding. Last check: 2007-11-06)
		The 5916 PC ISA bus expander kit allows you to easily expand the number of available ISA card slots in any host PC.
		The 5916 provides a completely software transparent active AT ISA bus extension between the host PC and the ISA expansion chassis.
		One of the cards in the set plugs into an open ISA slot in the host computer, while the other installs into an open ISA slot in the expansion chassis.
	www.dactest.com /catpages/5916ISA.htm (263 words)

	Amazon.com: Books: Embedded PCs ISA Bus, The (Site not responding. Last check: 2007-11-06)
		ISA and EISA Theory and Operation by Edward Solari
		Provided is an advanced and comprehensive compendium of practical techniques for bare metal ISA bus projects.
		Customers interested in Embedded PCs ISA Bus, The may also be interested in
	www.amazon.com /exec/obidos/tg/detail/-/157398017X?v=glance (764 words)

	Writing EISA and ISA Bus Device Drivers
		This manual provides information for systems engineers who write device drivers for the EISA and ISA buses.
		The manual describes EISA/ISA bus- specific topics including EISA/ISA bus architecture and data structures that EISA/ISA bus device drivers use.
		Digital Equipment Corporation makes no representations that the use of its products in the manner described in this publication will not infringe on existing or future patent rights, nor do the descriptions contained in this publication imply the granting of licenses to make, use, or sell equipment or software in accordance with the description.
	www.cs.arizona.edu /computer.help/policy/DIGITAL_unix/AA-Q0R6C-TET1_html/TITLE.html (235 words)

	RADICOM: ISA Bus Data/Fax/Voice Modem
		The 336i-AC/2 and 560i-AC/2 modem family are full-featured, self-contained data / fax /voice modems, designed for ISA Bus applications.
		The modems transmit high-speed data rates for up to 56 kbps, and fax at 14.4 kbps.
		DOS, Windows 3.1, Windows 95 or NT One available ISA slot
	www.radi.com /isabus2.htm (240 words)

	Backplanes
		PCISA Bus Passive Backplane- 1 PCISA / 2 PCI
		6-slot ISA passive butterfly backplane with L: 3-ISA and R: 3-ISA slots
		Three segments contain two PCI slots, 1 PICMG CPU slot, and 1 ISA slot and one segment contains 3 PCI slots.
	www.voxtechnologies.com /backplanes (1949 words)

	Controlled.com - ISA Bus Products Vendors News
		ISA Bus Control-Related Products, Vendors, News, FAQ, More!
		PC104 bus, PCI bus, VXI bus, VME bus, STD bus
		Quatech Releases Windows 2000 Support for Serial ISA Boards
	www.controlled.com /isa (100 words)

	PCGuide - Ref - Older System Bus Types (Site not responding. Last check: 2007-11-06)
		PCGuide - Ref - Older System Bus Types
		It seems that either your browser does not support frames, or you have them disabled.
		Please read the Site Guide before using this material.
	www.pcguide.com /ref/mbsys/buses/types/older_ISA.htm (199 words)

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