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Macintosh Centris
Macintosh Centris is a family of personal computers designed, manufactured and sold by Apple Inc., Apple Computer, Inc. in 1992 and 1993. They were introduced as a replacement for the six-year-old Macintosh II family, Macintosh II family of computers; the name was chosen to indicate that the consumer was selecting a Macintosh in the ''center'' of Apple's product line. Centris machines were the first to offer Motorola 68040 CPUs at a price point around US$2,500, making them less expensive (albeit slower and less expansion options) than Macintosh Quadra, Quadra computers, but also offering considerably higher performance than the Macintosh LC family, Macintosh LC computers of the time powered by the Motorola 68030. Apple released three computers bearing the Centris name: the Macintosh Quadra 610, Centris 610 (replacing the Macintosh IIsi) and Macintosh Quadra 650, Centris 650 (replacing the Macintosh IIci in form and the Macintosh Quadra 700, Quadra 700 in function), both of which ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 Centris 660AV
The Macintosh Quadra 660AV, originally sold as the Macintosh Centris 660AV, is a personal computer designed, manufactured and sold by Apple Computer from July 1993 to September 1994. It was introduced alongside the Quadra 840AV; the "AV" after both model numbers signifies video input and output capabilities and enhanced audio. It was rebranded from Centris to Quadra in September 1993 without any actual internal changes. The 660AV was discontinued a few months after the introduction of the Power Macintosh 6100/60AV. Apple sold a Power Macintosh Upgrade Card that upgrades the 660AV to match the 6100/60AV's specifications for . This and the Quadra 630 were positioned for users who were not ready to move to PowerPC. Hardware The 660AV uses the pizza box form factor of the earlier Centris 610. The 660AV has a full Motorola 68040 instead of the 610's FPU-less 68LC040. Thanks to the SCSI direct-memory access chip and the SCSI Manager software, the 660AV outperformed the discon ... [...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 discontinue ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Macintosh Centris
Macintosh Centris is a family of personal computers designed, manufactured and sold by Apple Inc., Apple Computer, Inc. in 1992 and 1993. They were introduced as a replacement for the six-year-old Macintosh II family, Macintosh II family of computers; the name was chosen to indicate that the consumer was selecting a Macintosh in the ''center'' of Apple's product line. Centris machines were the first to offer Motorola 68040 CPUs at a price point around US$2,500, making them less expensive (albeit slower and less expansion options) than Macintosh Quadra, Quadra computers, but also offering considerably higher performance than the Macintosh LC family, Macintosh LC computers of the time powered by the Motorola 68030. Apple released three computers bearing the Centris name: the Macintosh Quadra 610, Centris 610 (replacing the Macintosh IIsi) and Macintosh Quadra 650, Centris 650 (replacing the Macintosh IIci in form and the Macintosh Quadra 700, Quadra 700 in function), both of which ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Digital Signal Processor
A digital signal processor (DSP) is a specialized microprocessor chip, with its architecture optimized for the operational needs of digital signal processing. DSPs are fabricated on metal–oxide–semiconductor (MOS) integrated circuit chips. They are widely used in audio signal processing, telecommunications, digital image processing, radar, sonar and speech recognition systems, and in common consumer electronic devices such as mobile phones, disk drives and high-definition television (HDTV) products. The goal of a DSP is usually to measure, filter or compress continuous real-world analog signals. Most general-purpose microprocessors can also execute digital signal processing algorithms successfully, but may not be able to keep up with such processing continuously in real-time. Also, dedicated DSPs usually have better power efficiency, thus they are more suitable in portable devices such as mobile phones because of power consumption constraints. DSPs often use special m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AT&T
AT&T Inc., an abbreviation for its predecessor's former name, the American Telephone and Telegraph Company, is an American multinational telecommunications holding company headquartered at Whitacre Tower in Downtown Dallas, Texas. It is the world's List of telecommunications companies, third largest telecommunications company by revenue and the List of mobile network operators in the United States, third largest wireless carrier in the United States behind T-Mobile US, T-Mobile and Verizon. As of 2023, AT&T was ranked 32nd on the Fortune 500, ''Fortune'' 500 rankings of the largest United States corporations, with revenues of $122.4 billion. The modern company to bear the AT&T name began its history as the American District Telegraph Company, formed in St. Louis in 1878. After expanding services to Arkansas, Kansas, Oklahoma and Texas through a series of mergers, it became the Southwestern Bell Telephone Company in 1920. Southwestern Bell was a subsidiary of AT&T Corporation, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ethernet
Ethernet ( ) is a family of wired computer networking technologies commonly used in local area networks (LAN), metropolitan area networks (MAN) and wide area networks (WAN). It was commercially introduced in 1980 and first standardized in 1983 as IEEE 802.3. Ethernet has since been refined to support higher bit rates, a greater number of nodes, and longer link distances, but retains much backward compatibility. Over time, Ethernet has largely replaced competing wired LAN technologies such as Token Ring, FDDI and ARCNET. The original 10BASE5 Ethernet uses a thick coaxial cable as a shared medium. This was largely superseded by 10BASE2, which used a thinner and more flexible cable that was both less expensive and easier to use. More modern Ethernet variants use Ethernet over twisted pair, twisted pair and fiber optic links in conjunction with Network switch, switches. Over the course of its history, Ethernet data transfer rates have been increased from the original to the lates ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Power Macintosh 6100
The Power Macintosh 6100 (also sold as the Performa 6110 – 6118 and the Workgroup Server 6150) is a personal computer designed, manufactured and sold by Apple Computer from March 1994 to March 1996. It is the first computer from Apple to use the new PowerPC processor created by IBM and Motorola. The low-profile ("pizza-box") case was inherited from the Centris/Quadra 610 and 660AV models, and replaced the Macintosh Quadra series that used the Motorola 68040 processor, Apple's previous high-end workstation line. For the consumer market, the 6100 was re-branded as a Macintosh Performa with model numbers in the 6110 – 6118 range denoting bundled software and hard drive sizes. An Apple Multiple Scan 15 Display and AppleDesign Keyboard were included as part of the package. For the server market, a variant was offered with additional server software, called the Apple Workgroup Server 6150. The 6100 was discontinued without a direct replacement. Overview The 6100 was intr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apple Workgroup Server
Apple Workgroup Server and Macintosh Server are a family of Macintosh-based workgroup servers, sold by Apple Computer from 1993 to 2003. Machines bearing these names are re-branded Centris, Quadra and Power Macintosh systems with additional server software and sometimes larger hard drives. Apart from that, they were mostly identical to the machines they are based on. The "Workgroup Server" name was used until the release of the Power Macintosh G3 in 1998. In 1996 and 1997, Apple also sold a separate range of machines marketed as the Apple Network Server, which were specially designed servers that exclusively ran AIX and thus do not qualify as Macintosh computers. The first models were the Workgroup Server 60, 80 and 95, introduced together at CeBIT in Hanover on March 22, 1993. Customer shipments of the 95 began in April, with the 60 and 80 following in July. New models were introduced every year except 1995, and remained on the market until 2003, several months after the rac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Computer Monitor
A computer monitor is an output device that displays information in pictorial or textual form. A discrete monitor comprises a electronic visual display, visual display, support electronics, power supply, Housing (engineering), housing, electrical connectors, and external user controls. The display in modern monitors is typically an Liquid-crystal display, LCD with LED-backlit LCD, LED backlight, having by the 2010s replaced cold-cathode fluorescent lamp, CCFL Backlight, backlit LCDs. Before the mid-2000s, most monitors used a cathode-ray tube, cathode-ray tube (CRT) as the image output technology. A monitor is typically connected to its host computer via DisplayPort, HDMI, USB-C, Digital Visual Interface, DVI, or VGA connector, VGA. Monitors sometimes use other proprietary connectors and signals to connect to a computer, which is less common. Originally computer monitors were used for data processing while television sets were used for video. From the 1980s onward, computers ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Floating-point Unit
A floating-point unit (FPU), numeric processing unit (NPU), colloquially math coprocessor, is a part of a computer system specially designed to carry out operations on floating-point numbers. Typical operations are addition, subtraction, multiplication, division, and square root. Modern designs generally include a fused multiply-add instruction, which was found to be very common in real-world code. Some FPUs can also perform various transcendental functions such as exponential or trigonometric calculations, but the accuracy can be low, so some systems prefer to compute these functions in software. Floating-point operations were originally handled in software in early computers. Over time, manufacturers began to provide standardized floating-point libraries as part of their software collections. Some machines, those dedicated to scientific processing, would include specialized hardware to perform some of these tasks with much greater speed. The introduction of microcode in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Motorola 68LC040
The Motorola 68040 ("''sixty-eight-oh-forty''") is a 32-bit microprocessor in the Motorola 68000 series, released in 1990. It is the successor to the 68030 and is followed by the 68060, skipping the 68050. In keeping with general Motorola naming, the 68040 is often referred to as simply the '040 (pronounced ''oh-four-oh'' or ''oh-forty''). The 68040 was the first 680x0 family member with an on-chip Floating-Point Unit (FPU). It thus included all of the functionality that previously required external chips, namely the FPU and Memory Management Unit (MMU), which was added in the 68030. It also had split instruction and data caches of 4 kilobytes each. It was fully pipelined, with six stages. Versions of the 68040 were created for specific market segments, including the 68LC040, which removed the FPU, and the 68EC040, which removed both the FPU and MMU. Motorola had intended the EC variant for embedded use, but embedded processors during the 68040's time did not need the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
