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Phoebe (computer)
The Phoebe 2100 (or ) was to be Acorn Computers' successor to the RiscPC, slated for release in late 1998. However, in September 1998, Acorn cancelled the project as part of a restructuring of the company. Specification :233 MHz Intel StrongARM SA110 Revision S CPU. Support for multiple CPUs on daughter cards available, but multiple CPU support was not available in RISC OS :64 MHz front-side bus :up to 512 MiB of SDRAM :IOMD2 I/O Controller ::PLX Technology PCI bridge PCI9080 :::4 PCI slots (33MHz) ::PC Style Joystick/Game Port ::3 Acorn Podule expansion sockets ::SMC37672 SuperIO chip supporting: :::PS/2 Keyboard and Mouse :::Two EIDE channels supporting up to four devices (6.4 GB unit supplied) :::Two serial ports :::Parallel Port :::Single Floppy drive :VIDC20 Revision R video controller supporting: ::4 MiB of EDO VRAM running at 200 MHz : NLX form factor Tower case with a custom yellow front panel (by the designers of Iomega's zip drive) : Slot loadin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acorn Phoebe RISC PC 2 Logo
The acorn, or oaknut, is the nut of the oaks and their close relatives (genera ''Quercus'' and ''Lithocarpus'', in the family Fagaceae). It usually contains one seed (occasionally two seeds), enclosed in a tough, leathery shell, and borne in a cup-shaped cupule. Acorns are long and on the fat side. Acorns take between 5 and 24 months (depending on the species) to mature; see the list of ''Quercus'' species for details of oak classification, in which acorn morphology and phenology are important factors. Etymology The word ''acorn'' (earlier ''akerne'', and ''acharn'') is related to the Gothic name ''akran'', which had the sense of "fruit of the unenclosed land". The word was applied to the most important forest produce, that of the oak. Chaucer spoke of "achornes of okes" in the 14th century. By degrees, popular etymology connected the word both with "corn" and "oak-horn", and the spelling changed accordingly. The current spelling (emerged 15c.-16c.), derives from associat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Megahertz
The hertz (symbol: Hz) is the unit of frequency in the International System of Units (SI), equivalent to one event (or Cycle per second, cycle) per second. The hertz is an SI derived unit whose expression in terms of SI base units is s−1, meaning that one hertz is the reciprocal of one second. It is named after Heinrich Hertz, Heinrich Rudolf Hertz (1857–1894), the first person to provide conclusive proof of the existence of electromagnetic waves. Hertz are commonly expressed in metric prefix, multiples: kilohertz (kHz), megahertz (MHz), gigahertz (GHz), terahertz (THz). Some of the unit's most common uses are in the description of periodic waveforms and musical tones, particularly those used in radio- and audio-related applications. It is also used to describe the clock speeds at which computers and other electronics are driven. The units are sometimes also used as a representation of the photon energy, energy of a photon, via the Planck relation ''E'' = ''hν'', ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zip Drive
The Zip drive is a removable floppy disk storage system that was introduced by Iomega in late 1994. Considered medium-to-high-capacity at the time of its release, Zip disks were originally launched with capacities of 100 MB, then 250 MB, and finally 750 MB. The format became the most popular of the superfloppy products which filled a niche in the late 1990s portable storage market. However, it was never popular enough to replace the -inch floppy disk. Zip drives fell out of favor for mass portable storage during the early 2000s as CD-RW and USB flash drives became prevalent. The Zip brand later covered internal and external CD writers known as Zip-650 or Zip-CD, despite the dissimilar technology. Overview The Zip drive is a "superfloppy" disk drive that has all of the -inch floppy drive's convenience, but with much greater capacity options and with performance that is much improved over a standard floppy drive. However, Zip disk housings are much thicker th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iomega
Iomega (later LenovoEMC) produced external, portable, and networked data storage products. Established in the 1980s in Roy, Utah, United States, Iomega sold more than 410 million digital storage drives and disks, including the Zip drive floppy disk system. Formerly a public company, it was acquired by EMC Corporation in 2008, and then by Lenovo, which rebranded the product line as LenovoEMC, until discontinuation in 2018. History Iomega started in Roy, Utah, U.S. in 1980 and moved its headquarters to San Diego, California in 2001. For many years, it was a significant name in the data storage industry. Iomega's most famous product, the Zip Drive, offers relatively large amounts of storage on portable disks. The original Zip disk's 100MB capacity is a huge improvement over the decades-long standard of 1.44MB floppy disks. The Zip Drive became a common internal and external peripheral for IBM-compatible and Macintosh personal computers. However, Zip disks sometimes failed after a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NLX (motherboard Form Factor)
NLX (short for New Low Profile eXtended) was a form factor proposed by Intel and developed jointly with IBM, DEC, and other vendors for low profile, low cost, mass-marketed retail PCs. Release 1.2 was finalized in March 1997 and release 1.8 was finalized in April 1999. NLX was similar in overall design to LPX, including a riser card and a low-profile slimline case. It was modernized and updated to allow support for the latest technologies while keeping costs down and fixing the main problems with LPX. It specified motherboards from to in size. Officially, the NLX form factor was designed to use ATX power supplies and featured the same soft power function. However, for size reduction, some NLX cases instead used the smaller SFX form factor or proprietary form factors with the same 20-pin connector. Many slimline systems that were formerly designed to fit the LPX form factor were modified to fit NLX. NLX is a true standard, unlike LPX, making interchangeability of components ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Video RAM
Dual-ported video RAM, or VRAM, is a dual-ported variant of dynamic RAM (DRAM), which was once commonly used to store the framebuffer in graphics adapters. Note that most computers and game consoles do not use this form of memory, and dual-ported VRAM should not be confused with other forms of video memory. History It was invented by F. Dill, D. Ling and R. Matick at IBM Research in 1980, with a patent issued in 1985 (US Patent 4,541,075). The first commercial use of VRAM was in a high-resolution graphics adapter introduced in 1986 by IBM for its RT PC system, which set a new standard for graphics displays. Prior to the development of VRAM, dual-ported memory was quite expensive, limiting higher resolution bitmapped graphics to high-end workstations. VRAM improved the overall framebuffer throughput, allowing low cost, high-resolution, high-speed, color graphics. Modern GUI-based operating systems benefitted from this and thus it provided a key ingredient for proliferation o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Megabyte
The megabyte is a multiple of the unit byte for digital information. Its recommended unit symbol is MB. The unit prefix ''mega'' is a multiplier of (106) in the International System of Units (SI). Therefore, one megabyte is one million bytes of information. This definition has been incorporated into the International System of Quantities. In the computer and information technology fields, other definitions have been used that arose for historical reasons of convenience. A common usage has been to designate one megabyte as (220 B), a quantity that conveniently expresses the binary architecture of digital computer memory. The standards bodies have deprecated this usage of the megabyte in favor of a new set of binary prefixes, in which this quantity is designated by the unit mebibyte (MiB). Definitions The unit megabyte is commonly used for 10002 (one million) bytes or 10242 bytes. The interpretation of using base 1024 originated as technical jargon for the byte SI prefix, mult ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Video Controller
A graphics card (also called a video card, display card, graphics adapter, VGA card/VGA, video adapter, display adapter, or mistakenly GPU) is an expansion card which generates a feed of output images to a display device, such as a computer monitor. Graphics cards are sometimes called discrete or dedicated graphics cards to emphasize their distinction to integrated graphics. A graphics processing unit that performs the necessary computations is the main component of a graphics card, but the acronym "GPU" is sometimes also used to refer to the graphics card as a whole. Most graphics cards are not limited to simple display output. The graphics processing unit can be used for additional processing, which reduces the load from the central processing unit. Additionally, computing platforms such as OpenCL and CUDA allow using graphics cards for general-purpose computing. Applications of general-purpose computing on graphics cards include AI training, cryptocurrency mining, and molec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gigabyte
The gigabyte () is a multiple of the unit byte for digital information. The prefix ''giga'' means 109 in the International System of Units (SI). Therefore, one gigabyte is one billion bytes. The unit symbol for the gigabyte is GB. This definition is used in all contexts of science (especially data science), engineering, business, and many areas of computing, including storage capacities of hard drives, solid state drives, and tapes, as well as data transmission speeds. However, the term is also used in some fields of computer science and information technology to denote (10243 or 230) bytes, particularly for sizes of RAM. Thus, prior to 1998, some usage of ''gigabyte'' has been ambiguous. To resolve this difficulty, IEC 80000-13 clarifies that a ''gigabyte'' (GB) is 109 bytes and specifies the term ''gibibyte'' (GiB) to denote 230 bytes. These differences are still readily seen for example, when a 400 GB drive's capacity is displayed by Microsoft Windows as 372 G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Advanced Technology Attachment
Parallel ATA (PATA), originally , also known as IDE, is a standard interface designed for IBM PC-compatible computers. It was first developed by Western Digital and Compaq in 1986 for compatible hard drives and CD or DVD drives. The connection is used for storage devices such as hard disk drives, floppy disk drives, and optical disc drives in computers. The standard is maintained by the X3/INCITS committee. It uses the underlying (ATA) and Packet Interface ( ATAPI) standards. The Parallel ATA standard is the result of a long history of incremental technical development, which began with the original AT Attachment interface, developed for use in early PC AT equipment. The ATA interface itself evolved in several stages from Western Digital's original Integrated Drive Electronics (IDE) interface. As a result, many near-synonyms for ATA/ATAPI and its previous incarnations are still in common informal use, in particular Extended IDE (EIDE) and Ultra ATA (UATA). After the introdu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SuperIO
Super I/O is a class of I/O controller integrated circuits that began to be used on personal computer motherboards in the late 1980s, originally as add-in cards, later embedded on the motherboards. A super I/O chip combines interfaces for a variety of low-bandwidth devices. Now it is mostly merged with EC. The functions below are usually provided by the super I/O if they are on the motherboard: * A floppy-disk controller * An IEEE 1284-compatible parallel port (commonly used for printers) * One or more 16C550-compatible serial port UARTs * Keyboard controller for PS/2 keyboard and/or mouse Most Super I/O chips include some additional low-speed devices, such as: * Temperature, voltage, and fan speed interface * Thermal Zone * Chassis intrusion detection * Mainboard power management * LED management * PWM fan speed control * An IrDA Port controller * A game port (not provided by recent super I/O chips anymore because Windows XP is the last Windows OS to support a game port ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PCI Bridge
PCI may refer to: Business and economics * Payment card industry, businesses associated with debit, credit, and other payment cards ** Payment Card Industry Data Security Standard, a set of security requirements for credit card processors * Provincial Competitiveness Index, a governance index of Vietnamese provinces * Ceridian-UCLA Pulse of Commerce Index, a U.S. economic indicator based on trucking fuel consumption * Per capita income * Equitable PCI Bank, a Philippine bank Science and technology * Panel call indicator, telephone signalling system * Pavement condition index, used in transportation civil engineering * Picocurie (pCi), a unit of radioactivity * Peripheral Component Interconnect, a computer bus ** PCI-X (PCI eXtended), a computer bus ** PCI Express (PCIe), a computer bus * Projects of Common Interest, a category of EU projects for interconnecting energy infrastructures * Protocol-control information, in telecommunication * Pulverized coal injection method, in bl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
