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Macintosh Quadra
The Macintosh Quadra is a family of personal computers designed, manufactured and sold by Apple Inc., 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 Mac (computer), Macintosh model. The first models were the Macintosh Quadra 700, Quadra 700 and Macintosh Quadra 900, Quadra 900, both introduced in October 1991, with the latter discontinued after six months and replaced by the Macintosh Quadra 950, Quadra 950. The Macintosh Quadra 800, Quadra 800 was added in February 1993 (succeeding the Quadra 700), followed the multimedia-focused Macintosh Quadra 840AV, 840AV at the end of July 1993. The Macintosh Centris line was merged with the Quadra in October 1993, adding the Macintosh Quadra 610, 610, Macintosh Quadra 650, 650 and Macintosh Quadra 660AV, 660AV to the range. The Macintosh Quadra 605, 605 (also sold as the Performa 475 or LC 475) was also introduced in Oc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Macintosh 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 Macintosh Quadra, Quadra series of Apple Macintosh, 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 Macintosh Quadra 700, 700 and the Macintosh Quadra 900, 900 / Macintosh Quadra 950, 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 memory, interleaved RAM running at 70 ns, as well as an enhanced video system and SCSI bus, enabled it to outperform the 950. However, its Computer tower, tower case was smaller and much less accessible, giving it the reputation of being one of Apple' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Macintosh Quadra 700
The Macintosh Quadra 700 is a personal computer designed, manufactured and sold by Apple Computer from October 1991 to March 1993. It was introduced alongside the Quadra 900 as the first computers in the Quadra series, using the Motorola 68040 processor in order to compete with IBM-compatible PCs powered by the Intel i486DX. The Quadra 700 is also the first computer from Apple to be housed in a mini-tower form factor, which in 1991 was becoming a popular alternative to standard desktop-on-monitor cases that were common through the 1980s. The Quadra 700 was considerably more popular than the Quadra 900 (succeeded after six months by the faster but otherwise very similar Quadra 950) that it was sold alongside, due to the 900/950 having more expansion options in their full tower cases which made them more expensive and bulky. The Quadra 700 originally had a list price of US$5,700, but had dropped to under $4,700 for a base model by the time its replacement, the Quadra 800, w ... [...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 * Quadra, Telecine introduced by Broadcast Television Systems Inc. in 1993 * Quadra, a group of four psychological types in the theory of socionics * ''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'' * Quadra, a genus of flies described in 1929 See also * Álvaro de la Quadra (d.1564), Spanish Ambassador to England during the reign of Queen Elizabeth of England * Juan Francisco de la Bodega y Quadra Juan Francisco de la Bodega y Quadra (22 May 1743 – 26 March 1794) w ... [...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 March 1996. 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; the 630's form factor was retained with the Power Maci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AT&T Corporation
AT&T Corporation, an abbreviation for its former name, the American Telephone and Telegraph Company, was an American telecommunications company that provided voice, video, data, and Internet telecommunications and professional services to businesses, consumers, and government agencies. During the Bell System's long history, AT&T was at times the world's largest telecommunications company, the world's largest cable television operator, and a regulated monopoly. At its peak in the 1950s and 1960s, it employed one million people and its revenue ranged between US$3 billion in 1950 ($ in present-day terms) and $12 billion in 1966 ($ in present-day terms). In 2005, AT&T was acquired by " Baby Bell" and former subsidiary SBC Communications for more than $16 billion ($ in present-day terms). SBC then changed its name to AT&T Inc., with AT&T Corporation continuing to exist as a long-distance calling subsidiary until its dissolution on May 1, 2024. History Origins ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Computer Tower
In personal computing, a tower unit, or simply a tower, is a form factor of desktop computer case whose height is much greater than its width, thus having the appearance of an upstanding tower block, as opposed to a traditional " pizza box" computer case whose width is greater than its height and appears lying flat. Compared to a pizza box case, the tower tends to be larger and offers more potential for internal volume for the same desk area occupied, and therefore allows more hardware installation and theoretically better airflow for cooling. Multiple size subclasses of the tower form factor have been established to differentiate their varying sizes, including full-tower, mid-tower, midi-tower, mini-tower, and deskside; these classifications are however nebulously defined and inconsistently applied by different manufacturers. Although the traditional layout for a tower system is to have the case placed on top of the desk alongside the monitor and other peripherals, a far more ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Macworld
''Macworld'' is a digital magazine and website dedicated to products and software of Apple Inc., published by Foundry, a subsidiary of IDG. History ''Macworld'' was founded by David Bunnell and Cheryl Woodard (publishers) and Andrew Fluegelman (editor). It began as a print magazine in 1984, with its first issue distributed at the launch of the Macintosh computer. As a print magazine, it had the largest audited circulation (both total and newsstand) of Macintosh-focused magazines in North America, more than double its nearest competitor, '' MacLife''. In 1997, the Ziff-Davis-owned '' MacUser'' magazine was consolidated into ''Macworld'' within the new Mac Publishing joint venture between IDG and Ziff-Davis. In 1999, the combined company also purchased the online publication MacCentral Online, because ''Macworld'' did not have a powerful online news component at the time. In late 2001 IDG bought out Ziff-Davis' share of Mac Publishing, making it a wholly-owned subsidiary ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SCSI
Small Computer System Interface (SCSI, ) is a set of standards for physically connecting and transferring data between computers and peripheral devices, best known for its use with storage devices such as hard disk drives. SCSI was introduced in the 1980s and has seen widespread use on servers and high-end workstations, with new SCSI standards being published as recently as SAS-4 in 2017. The SCSI standards define commands, protocols, electrical, optical and logical interfaces. The SCSI standard defines command sets for specific peripheral device types; the presence of "unknown" as one of these types means that in theory it can be used as an interface to almost any device, but the standard is highly pragmatic and addressed toward commercial requirements. The initial Parallel SCSI was most commonly used for hard disk drives and tape drives, but it can connect a wide range of other devices, including scanners and optical disc drives, although not all controllers can handle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Interleaved Memory
In computing, interleaved memory is a design which compensates for the relatively slow speed of dynamic random-access memory (DRAM) or core memory, by spreading memory addresses evenly across memory banks. That way, contiguous memory reads and writes use each memory bank in turn, resulting in higher memory throughput due to reduced waiting for memory banks to become ready for the operations. It is different from multi-channel memory architectures, primarily as interleaved memory does not add more channels between the main memory and the memory controller. However, channel interleaving is also possible, for example in freescale i.MX6 processors, which allow interleaving to be done between two channels. Overview With interleaved memory, memory addresses are allocated to each memory bank in turn. For example, in an interleaved system with two memory banks (assuming word-addressable memory), if logical address 32 belongs to bank 0, then logical address 33 would belong to ban ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NuBus
NuBus () is a 32-bit parallel computer bus, originally developed at MIT during between 1978 and 1979 as part of the NuMachine workstation project, it would subsequently be standardized by the IEEE in 1987. 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. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Computer Tower
In personal computing, a tower unit, or simply a tower, is a form factor of desktop computer case whose height is much greater than its width, thus having the appearance of an upstanding tower block, as opposed to a traditional " pizza box" computer case whose width is greater than its height and appears lying flat. Compared to a pizza box case, the tower tends to be larger and offers more potential for internal volume for the same desk area occupied, and therefore allows more hardware installation and theoretically better airflow for cooling. Multiple size subclasses of the tower form factor have been established to differentiate their varying sizes, including full-tower, mid-tower, midi-tower, mini-tower, and deskside; these classifications are however nebulously defined and inconsistently applied by different manufacturers. Although the traditional layout for a tower system is to have the case placed on top of the desk alongside the monitor and other peripherals, a far more ... [...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, if a machine had bus expansion slots it would feature multiple bus expansions slots. However, there was never more than one PDS slot, as 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 Moto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
