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Macintosh Quadra
The Macintosh Quadra is a family of personal computers designed, manufactured and sold by Apple Computer, Inc. from October 1991 to October 1995. The Quadra, named for the Motorola 68040 central processing unit, replaced the Macintosh II family as the high-end Macintosh model. The first models were the Quadra 700 and Quadra 900, both introduced in October 1991. The Quadra 800, 840AV and 605 were added through 1993. The Macintosh Centris line was merged with the Quadra in October 1993, adding the 610, 650 and 660AV to the range. After the introduction of the Power Macintosh line in early 1994, Apple continued to produce and sell new Quadra models; the 950 continued to be sold until October, 1995. The product manager for the Quadra family was Frank Casanova who was also the Product Manager for the Macintosh IIfx. Models The first computers bearing the Macintosh Quadra name were the Quadra 700 and Quadra 900, both introduced in 1991 with a central processing unit (CPU) s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quadra 840AV & Macintosh 16-inch Color Display & AppleDesign Powered Speakers & Apple Extended Keyboard II & Apple Desktop Bus Mouse II
Quadra may refer to: * Quadra, São Paulo, a municipality in Brazil * Quadra Island, British Columbia, Canada * Vancouver Quadra, a federal electoral district in British Columbia, Canada * , a Royal Canadian Navy cadet training center in Comox, British Columbia * Macintosh Quadra, a line of computers made by Apple Computer * Spirit DataCine#FDL 90 and_Quadra, Quadra, Telecine introduced by Broadcast Television Systems Inc. in 1993 * Socionics#Quadras, Quadra, a group of four psychological types in the theory of socionics * Quadra (album), ''Quadra'' (album), by Brazilian heavy metal band Sepultura * Quadra Blu, a character from Max Rep comics by illustrator Lyman Dally * The fighting style of several characters in the anime manga and light novel ''Aria the Scarlet Ammo'' See also * Juan Francisco de la Bodega y Quadra (1743–1794), Spanish explorer * Quadra's and Vancouver's Island, the original name of Vancouver Island * Hostius Quadra, an ancient Roman man described in Senec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Macintosh Quadra 950
The Macintosh Quadra 950 (also sold with additional software as the Workgroup Server 95) is a personal computer designed, manufactured and sold by Apple Computer from March 1992 to October 1995. It replaced the Quadra 900 that was introduced several months earlier, increasing the CPU clock rate of its 68040 CPU from to , and improving the graphics support. The two computers were otherwise identical, including the price. With a Macintosh Processor Upgrade Card installed, this computer is known as the Power Macintosh 950. In 1993, the 950 was overtaken in performance by the less expensive Quadra 800 and 840AV. The newer Quadras had the addition of interleaved RAM, as well as an enhanced video system and SCSI bus. However, their more compact ( mini-tower) case offered less expansion capability, so the 950 (due to its mid-tower case allowing 6 slots to be supported) was kept in continued production for the server market, outliving the 800 and 840AV. Also, the Quadra 800 was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pizza Box Form Factor
In computing, a pizza box is a style of case design for desktop computers or network switches. Pizza box cases tend to be wide and flat, normally in height, resembling pizza delivery boxes and thus the name. This is in contrast to a tower system, whose case height is much greater than the width and has an "upright" appearance. In modern usage, the term "pizza box" is normally reserved for very flat cases with height no more than , while those taller than 2 inches are referred to as ''desktop'' cases instead. The common setup of a pizza box system is to have the display monitor placed directly on top of the case, which serves as a podium to elevate the monitor more towards the user's eye level, and to have other peripherals placed in front and alongside the case. Occasionally, the pizza box may be laid on its sides in a tower-like orientation. Data General's Aviion Unix server was the first to coin the expression when it advertised in 1991 with the tagline "Who just fit main ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quadra 800
The Macintosh Quadra 800 (also sold with bundled server software as the Apple Workgroup Server 80) is a personal computer that is a part of Apple Computer's Quadra series of Macintosh computers. Introduced in February 1993 alongside the first Macintosh Centris models, it was the first totally new Quadra model since the original Quadras, the 700 and the 900 / 950. It was positioned below the 950 (and the previous midrange Quadra, the 700, was discontinued shortly after the 800's introduction). Debuting at half the price of the 950, the 800 featured the same Motorola 68040 33 MHz processor as the 950 but its additional interleaved RAM running at 70 ns, as well as an enhanced video system and SCSI bus, enabled it to outperform the 950. However, its tower case was smaller and much less accessible, giving it the reputation of being one of Apple's worst cases of all time. The Quadra 800 was later joined by the multimedia-focused Quadra 840AV. The Quadra 800 was discontinued in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Minitower
A computer case, also known as a computer chassis, is the housing (engineering), enclosure that contains most of the computer hardware, hardware of a personal computer. The components housed inside the case (such as the CPU, motherboard, computer memory, memory, mass storage devices, power supply unit (computer), power supply unit and various expansion cards) are referred as the ''internal'' hardware, while hardware outside the case (typically electrical cable, cable-linked or plug-and-play devices such as the computer monitor, display, computer speaker, speakers, computer keyboard, keyboard, computer mouse, mouse and USB flash drives) are known as ''peripherals''. Conventional computer cases are fully enclosed, with small holes (mostly in the back panel) that allow heating, ventilation, and air conditioning, ventilation and cutout openings that provide access to electrical connector#Plug and socket connectors, plugs/sockets (back) and removable media drive bays (front). The struct ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quadra 950
The Macintosh Quadra 950 (also sold with additional software as the Workgroup Server 95) is a personal computer designed, manufactured and sold by Apple Computer from March 1992 to October 1995. It replaced the Quadra 900 that was introduced several months earlier, increasing the CPU clock rate of its 68040 CPU from to , and improving the graphics support. The two computers were otherwise identical, including the price. With a Macintosh Processor Upgrade Card installed, this computer is known as the Power Macintosh 950. In 1993, the 950 was overtaken in performance by the less expensive Quadra 800 and 840AV. The newer Quadras had the addition of interleaved RAM, as well as an enhanced video system and SCSI bus. However, their more compact ( mini-tower) case offered less expansion capability, so the 950 (due to its mid-tower case allowing 6 slots to be supported) was kept in continued production for the server market, outliving the 800 and 840AV. Also, the Quadra 800 was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NuBus
NuBus (pron. 'New Bus') is a 32-bit parallel computer bus, originally developed at MIT and standardized in 1987 as a part of the NuMachine workstation project. The first complete implementation of the NuBus was done by Western Digital for their NuMachine, and for the Lisp Machines Inc. LMI Lambda. The NuBus was later incorporated in Lisp products by Texas Instruments (Explorer), and used as the main expansion bus by Apple Computer and a variant called NeXTBus was developed by NeXT. It is no longer widely used outside the embedded market. Architecture Early microcomputer buses like S-100 were often just connections to the pins of the microprocessor and to the power rails. This meant that a change in the computer's architecture generally led to a new bus as well. Looking to avoid such problems in the future, NuBus was designed to be independent of the processor, its general architecture and any details of its I/O handling. Among its many advanced features for the era, NuBu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tower Case
In personal computing, a tower is a form of desktop computer whose case height is much greater than its width, thus having the appearance of an upstanding tower block, as opposed to a traditional desktop or "pizza box" computer whose width is greater than its height and appears lying flat. Although a tower case may be placed on top of the desk alongside the monitor and other peripherals, a far more common configuration is to place the case on the floor below the desk or in an under-desk compartment, in order to save desktop space for other items. Multiple subclasses of the tower form factor have been established to differentiate their varying heights, including full-tower, mid-tower, midi-tower and mini-tower; these classifications are nebulously defined and inconsistently applied by different manufacturers, however. Computer systems housed in the horizontal form factor—once popularized by the IBM PC in the 1980s but fallen out of mass use since the 1990s—have been given ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Processor Direct Slot
A processor direct slot (PDS) is a slot incorporated into many older Macintosh models that allowed direct access to the signal pins of a CPU, similar to the functionality of a local bus in PCs. This would result in much higher speeds than having to go through a bus layer, such as NuBus, which typically ran at a slower 10 MHz speed. Overview Typically, a machine would feature multiple bus expansions slots, if any. However, there was never more than one PDS slot. Rather than providing a sophisticated communication protocol with ''arbitration'' between different bits of hardware that might be trying to use the communication channel at the same time, the PDS slot, for the most part, just gave direct access to signal pins on the CPU, making it closer in nature to a local bus. Thus, PDS slots tended to be CPU-specific, and therefore a card designed for the PDS slot in the Motorola 68030-based Macintosh SE/30, for example, would not work in the Motorola 68040-based Quadra 700. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Macintosh IIci
The Macintosh IIci is a personal computer designed, manufactured, and sold by Apple Computer, Inc. from September 1989 to February 1993. It is a more powerful version of the Macintosh IIcx, released earlier that year, and shares the same compact case design. With three NuBus expansion slots and a Processor Direct Slot, the IIci also improved upon the IIcx's 16 MHz Motorola 68030 CPU and 68882 FPU, replacing them with 25 MHz versions of these chips. The Macintosh Quadra 700 was introduced at the end of 1991 as Apple's mainstream workstation product to replace the IIci, albeit at a significantly higher price point: by this time, Apple authorized resellers were offering entry-level IIci systems for US$4,000 or less, whereas the Quadra 700 entered the market above US$6,000. Because of this, Apple continued to sell the IIci until early 1993 when the less expensive Quadra 650 and comparably-priced Quadra 800 were introduced. Hardware The IIci introduced several techn ... [...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] |
Macintosh Quadra 630
The Macintosh Quadra 630 (also sold as the Macintosh LC 630 and Macintosh Performa 630) is a personal computer designed, manufactured and sold by Apple Computer from July 1994 to October 1995. It was introduced as the replacement for the Quadra 610, and was the least-expensive computer in the Macintosh lineup with prices starting at $1,199 USD. While Apple's transition to PowerPC CPUs had already begun with the introduction of the Power Macintosh a few months prior, the 630 was built around the older Motorola 68040 and 68LC040 chips. Two reasons were cited for this: One, the older chips were less expensive; and two, PowerPC-native education software was almost non-existent at the time. Also, existing PowerPC software had yet to be translated to non-English languages. The 630 was the last new Macintosh Quadra introduced, though the earlier Quadra 950 remained available longer. It was discontinued with no direct replacement; while the 630's form factor was retained with the Powe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
