It reproduces the wikipedia article micro channel architecture micro channel architecture in practice almost always shortened to mca was a proprietary 16 or 32bit parallel computer bus created by ibm in the 1980s for use on their new ps2 computers. Mca micro channel architecture this bus was developed by ibm as a replacement from scs x1027 at sathyabama university. Short for micro channel architecture, mca was introduced by ibm in 1987 as a competitor to the isa bus. Made extinct by the licensefree eisa bus and later by the pci bus. Mca micro channel architecture this bus was developed by. Microcomputer system an overview sciencedirect topics. Study of advanced bus architecture cpe 602 summer 97. Challenged by trade issues, where isa buses could be created by any organization, ibm recreated its bus architecture with proper licensing and regained its. The pin connections in mca are smaller than other bus interfaces. Developed by ibm for its line of ps2 desktop computers, micro channel architecture is an interface between a computer or multiple computers and its expansion cards and their associated devices. Micro channel architecture mca bus is an interface between a computer and multiple computers and its expansion cards and their associated devices. Micro channel architecture and powerpc reference platform prep architecture hardware in aix 5l v5.
Micro channel architecture expansion bus presently, the maximum achievable transfer rate on this bus is 40 mbytes per second using the 32bit streaming procedure. Both successfully opposed the proprietary micro channel architecture from ibm and laid the foundation for todays standard industry architecture server sias market. Mca pinout, micro channel architecture, ibm pc bus pinout. Ibm ps2 hardware interface technical reference manual.
At the same time, micro channel architecture mca bus was added by ibm to provide users with choices. System bus interface controller 506 is utilized to control the communication between sbim 500 and system bus 502. Micro channel buses and signals arbitration bus and associated signals. The mca bus never became widely used and has since been fazed out of the desktop computers. Personal system reference ibm ps2 19921995, withdrawn document. Mca bus article about mca bus by the free dictionary. The mca micro channel architecture bus was used as a pc expansion bus, allowing expansion cards to be plugged into mca slots on the mother board. It was first introduced in this series of machines in 1987, and slowly spread to their. The adapters provide highperformance implementation of raid5 arrays of 2 to. Micro channel architecture mca is a proprietary 32 and 16bit bus developed for ibms ps2 computers. Definition micro channel architecture mca was a proprietary.
Micro channel architecture, or the micro channel bus, was a proprietary 16or 32bit parallel computer bus introduced by ibm in 1987 which was used on ps2 and other computers until the mid1990s. Micro channel bus technical summary techfest pcguide mca info. In ibm products, it superseded the isa bus and was itself subsequently superseded by the pci bus architecture. Introduced in 1987, the mca was designed to replace the smaller at and industry standard architecture isa. In 1988, intel developed its version of the mca chip, known as the i82310. Highspeed serial bus repeater primer redriver and retimer micro architecture, properties, and usage revision 1. A 32bit bus, classified as eisa enhanced industry standard architecture or mca micro channel architecture, can carry data along 32 lines. Mca micro channel architecture mca bus expansion bus. The problem, as this site documents, was that mca, while technologically superior to the industry standard isa bus, was not what the market demanded. This is based o a 10 mhz bus speed with one data transfer taking place at each. The problems with the isa bus grew as systems became faster and more powerful. Mca was a distinct break from previous bus architectures such as industry standard architecture. The terms micro channel, micro channel architecture, or just mca, all refer to the same thing.
Micro channel scsi audio vga lan scsi add in video audio modem pci local bus. Micro channel architecture, or the micro channel bus, was a proprietary 16 or 32bit parallel computer bus introduced by ibm in 1987 which was used on ps2. Created by vesa video electronics standards association, the vesa local bus worked alongside the then dominant isa bus to provide a standardized highspeed conduit intended primarily to accelerate video graphics operations. A large number of technical improvements were made in this type of computer bus and the plugin cards used in it were software configurable. Mca offered several additional features over the isa such as a 32bit bus in addition to the standard 16bit bus. Micro channel architecture mca developed by ibm in 1987. Although it was extended to a 16bit bus with the speed of 8 mhz on pc at, the low speed led to extended industry standard architecture bus eisa design. Study of advanced bus architecture cpe 602 summer 97 prepared by. Microchannel architecture is ibms answer to the failings of its older pc bus, which is now referred to as the isa industry standard architecture bus.
As processors have become more powerful, and applications more demanding, the at bus has turned out to be the chief bottleneck in pcs. In response, ibm introduced the micro channel architecture mca in 1987. Also, it automatically configured cards similar to what plug and play is today, and included bus mastering for greater. Micro channel architecture architecture mca ibms proprietary 32bit bus, used in highend ps2 personal computers. Media in category micro channel architecture the following 3 files are in this category, out of 3 total. Micro channel architecture mca bus introduced on the ibm ps2 16bit or 32bit data path 10mhz clock configured by software rather than by jumpers or switches not compatible with the isa bus bus mastering. The micro channel architecture consists of an address bus, a data bus, a transfer control bus, an arbitration bus, and multiple support signals. Micro channel hardware microchannel micro channel architecture, mca informations. In accordance with a preferred embodiment of the present invention, system bus 502 is a micro channel architecture bus found in ps2 personal computers and risc system6000 work stations from international business machines corporation. Mengenal bus mca bus mca micro channel architecture adalah sebuah bus io berbandwidth 32bit yang digunakan dalam beberapa komputer mikro. Its name is commonly abbreviated as mca, although not by ibm. In computing, a bus is defined as a set of physical connections cables, printed circuits, etc. Mca is not compatible with either eisa or xt bus architecture so older cards cannot be used with it.
The design of micro channel interface for the nu bus architecture 54 5. Samaan, dan froelich, and samuel johnson, intel corporation 1. A system reset reset, which resets, the system microprocessor refer to the 80386sx, 80386dx and 80486. Short for extended industry standard architecture, eisa. Also known as micro channel architecture mca, it was an earlier, proprietary 32bit bus from ibm used in ps2, rs6000 and certain es9370 models. Chapter 3 a toplevel view of computer function and. Chapter 14 pci bus overview chemeketa community college. The three components were the ps2, os2 and the secret sauce the micro channel architecture. The vesa local bus usually abbreviated to vl bus or vlb was a shortlived expansion bus introduced during the i486 generation of x86 ibmcompatible personal computers.
Micro channel buses andsignals describes the buses and signals ofthe micro channel architecture. Design strategies for interface of bus architectures. By clicking accept, you understand that we use cookies to improve your experience on our website. Us5430847a method and system for extending system buses. Probably one person in a million understood what it was, and no one had a clue why it was so killer it wasnt and thats why it was so effective at clouding the judgment of so many. A 16bit bus, also called isa industry standard architecture, carries data along 16 lines. However, mca was not accepted by the computer industry because it was not backward compatible with the at bus, so ibm has been forced to drop it a more successful alternative to the. Micro channel architecture mca bus 16 bit allpinouts.
It eliminates potential conflicts that arise when installing new peripheral devices. Bus ini dibuat oleh ibm yang ditujukan untuk menggantikan bus isa 8bit16bit yang lambat, selain tentunya untuk menghadapi masalah bottleneck yang terjadi akibat kecepatan prosesor yang semakin tinggi tapi tidak diimbangi dengan kecepatan bus. Expansion bus chapter 5 overview in this chapter, you will learn to identify the structure and function of the expansion bus explain classic system resources identify the modern expansion bus slots install expansion cards properly troubleshoot expansion card problems structure and function of the expansion bus connections. In the pc, micro channel, along with isa, eisa, vl bus and agp, have disappeared. Nobody could make micro channel machines without ibms permission, and nobody could make micro channel cards without. Ernie mandese, joe mcgovern and gene thomas the subsystem control block scb architecture was developed by ibm to standardize the engineering task of designing micro channel bus master programming interfaces as well as the programming task of supporting them. Processormemorybus maybeproprietary shortandhighspeed matchedtothememorysystemtomaximizethememorypprocessorbandwidth. Not widely adopted by vendors as ibm charged royalties for the rights to use it. Micro channel architecture mca bus 32 bit allpinouts.
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