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Micro Channel Architecture ( MCA ) was a proprietary 16-or 32-bit parallel computer bus introduced by IBM in 1987 which was used on PS / 2 and other computers until the mid 1990s.
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** Minimum level required for POWER4 hardware and the last release that worked on the Micro Channel architecture
It was announced in September 1988 by a consortium of PC clone vendors ( the " Gang of Nine ") as a counter to IBM's use of its proprietary Micro Channel architecture ( MCA ) in its PS / 2 series.
For general desktop computer use it has been supplanted by later buses such as IBM Micro Channel, VESA Local Bus, Peripheral Component Interconnect and other successors.
# REDIRECT Micro Channel architecture
* Micro Channel architecture, a type of computer bus
While IBM's attempt at producing a successor to ISA with the Micro Channel Architecture was a technically viable option, it failed in the market due to its proprietary nature and imposed licensing fees.
It was an optional upgrade to the Micro Channel architecture based PS / 2's Video Graphics Array, and was delivered within three months of PS / 2's introduction.
The majority of the System 3000 range utilised IBM's Micro Channel architecture rather than the more prevalent ISA architecture, and utilised SCSI peripherals as well as the more popular parallel and serial port interfaces, resulting in a premium product with premium pricing.
IBM used PReP and CHRP for PCI version of IBM's RS / 6000 platform, from existing Micro Channel architecture models, and changed only to support the new 60x bus style of the PowerPC.
* Micro Channel architecture ( MCA )
The development of Micro Channel was driven by both technical and business pressures.
Patents on important Micro Channel features, such as Plug and Play automatic configuration, were not granted to IBM until after PCI had replaced MCA in the marketplace.
The IBM Micro Channel architecture was designed by engineer Chet Heath.
The advantage of this was that Micro Channel system boards could have a basic VGA or MCGA graphics system on board, and higher level graphics ( XGA or other accelerator cards ) could then share the same port.
Micro Channel architecture was first introduced at the launch of the PS / 2 range in 1987, with three out of the four of the new machines featuring it.
This offered similar performance benefits to Micro Channel, but with twin advantage of being able to accept older ISA boards, and being free from IBM's control.
Within a few years of its arrival in 1992, PCI had largely superseded Micro Channel, EISA and VESA.
Expansion cards for the Micro Channel bus typically targeted high-end graphic workstation or server requirements, with SCSI, Ethernet, IBM 5250 and IBM 3270 connections.
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* Micro Channel Architecture ( MCA ) vs. Extended Industry Standard Architecture ( EISA ).
* MPU-IMC: For the IBM PS / 2's Micro Channel Architecture bus.
Blackfin processors use a 32-bit RISC microcontroller programming model on a SIMD architecture, which was co-developed by Intel and Analog Devices, as MSA ( Micro Signal Architecture ).
For example when IBM abandoned their ill-fated but technically superior Micro Channel Architecture ( MCA ), Apricot was the only other OEM using it, in the Apricot Qi and VX FT ranges of PCs.
This machine, designed by Bob Cross, was a fault-tolerant file server based on Micro Channel Architecture, incorporating an external RAM cache and its own UPS.
Micro and was
At its peak, the Electron was the third best selling micro in the United Kingdom, and total lifetime game sales for the Electron exceeded those of the BBC Micro.
The hardware of the BBC Micro was emulated by a single customized ULA chip designed by Acorn in conjunction with Ferranti.
Due to needing two accesses to each chip instead of one, and the complications of the video hardware also needing access, reading or writing RAM was much slower than on the BBC Micro.
The Electron was developed during 1983 as a cheap sibling for the BBC Micro with the intention of capturing the low-cost Christmas sales market for that year.
This was a blow from which the machine never fully recovered, although games sales for it would ultimately outstrip those of the BBC Micro.
Because the WD1770 is capable of single density mode and uses the same IBM360 derived floppy disc format as the Intel 8271 found in the BBC Micro, it was also possible to run a DFS filing system with an alternate ROM, such as the P. R. E. S AP4 interface.
This behavior was the same as on the BBC Micro.
Of the capabilities present in the BBC Micro but absent from the Electron, the teletext-style mode 7 was particularly conspicuous because of the very low memory usage in that mode ( just less than 1 kB ) and the high number of BBC programs that used it.
The first used the same graphics processor as the BBC Micro in mode 7 — the SAA5050 — but used software to ensure that it was fed with the correct graphics data.
Like the BBC Micro, the Electron was constrained by limited memory resources.
On May 6, 2009, the company announced it was to be acquired by Micro Focus for $ 75 million.
The transaction was approved by Borland shareholders on July 22, 2009, with Micro Focus acquiring the company for $ 1. 50 / share.
Following Micro Focus shareholder approval and the required corporate filings, the transaction was completed in late July 2009.
* Disc Filing System ( DFS ) This was an optional component for the BBC Micro, offered as a kit with a disk controller chip, a ROM chip, and a handful of logic chips, to be installed inside the computer.
Micro was used to manage very large data sets by the US Department of Labor, the U. S. Environmental Protection Agency, and researchers from the University of Alberta, the University of Michigan, and Wayne State University.
By including interaction, scripting, and compilation, Forth was popular on computers with limited resources, such as the BBC Micro and Apple II series, and remains so in applications such as firmware and small microcontrollers.
A British computer that used the 6502 was the BBC Micro, manufactured by Acorn, Ltd.
The 801 was eventually produced in a single-chip form as the ROMP in 1981, which stood for ' Research OPD Products Division Micro Processor '.
The Disk Original Group ( DOG ) was a union formed of no less than seven Japanese video game companies: Square Co., Ltd., Micro Cabin, Thinking Rabbit, Carry Lab, System Sacom, XTALSOFT, and HummingBirdSoft.
The W300 was also the first Walkman Phone to support Memory Stick Micro and features a VGA camera.
A second processor implementation for the BBC Micro was produced by Cumana.
Java ME was formerly known as Java 2 Platform, Micro Edition ( J2ME ).
In Micro Planner, it was common to write programs to perform some operation on every element of a list by using a loop to process the first element of a list, take the rest of the list, and then jump back to the top of the loop to test if the list was empty.
0.268 seconds.