The Macintosh Quadra series was Apple Computer's product family of professional high-end Apple Macintosh personal computers built using the Motorola 68040 CPU from 1991 until the Power Mac was introduced in 1994. The Macintosh Quadra 800 (Codenames "Fridge" "Wombat 33" also sold with bundled server software as the Apple Workgroup Server 80) is a Apple Inc, ( formerly Apple Computer Inc, is an American Multinational corporation with a focus on designing and manufacturing Consumer electronics Macintosh, commonly nicknamed Mac is a Brand name which covers several lines of Personal computers designed developed and marketed by Apple Inc A personal computer ( PC) is any Computer whose original sales price size and capabilities make it useful for individuals and which is intended to be operated The Motorola 68040 is a Microprocessor from Motorola, released in 1990. Power Macintosh, later Power Mac, is a line of Apple Macintosh Workstation -class Personal computers based on various models of PowerPC The product manager for the Quadra family was Frank Casanova who was also the Product Manager for the Macintosh IIfx. The Macintosh IIfx was a model of Apple Macintosh computer introduced in 1990 as the fastest Mac and discontinued in 1992. The first models were the Quadra 700 and Quadra 900, both introduced in 1991. The Macintosh Quadra 700 was introduced (along with the Quadra 900) in October 1991 as Apple's first computers to use the Motorola 68040 processor as well as The Macintosh Quadra 900 was a high-end Personal computer introduced with the Quadra 700 in October 1991 as Apple Computer 's first computers in the
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Models
The first computers to be part of the Macintosh Quadra series were the Quadra 700 and Quadra 900, both introduced in 1991 with a Central processing unit (CPU) speed of 25 MHz. The Macintosh Quadra 700 was introduced (along with the Quadra 900) in October 1991 as Apple's first computers to use the Motorola 68040 processor as well as The Macintosh Quadra 900 was a high-end Personal computer introduced with the Quadra 700 in October 1991 as Apple Computer 's first computers in the Year 1991 ( MCMXCI) was a Common year starting on Tuesday (link will display full calendar of the Gregorian Calendar. The hertz (symbol Hz) is a measure of Frequency, informally defined as the number of events occurring per Second. The 700 was a compact model using the same case as the Macintosh IIci, with a Processor Direct Slot (PDS) expansion slot, while the latter was a newly designed tower case with five NuBus expansion slots and one PDS slot. The Apple Macintosh IIci was an improvement on the Macintosh IIcx. Processor Direct Slot or PDS, was a solution (actually a whole number of different solutions introduced by Apple Computer, in several of their Macintosh NuBus is a 32-bit parallel Computer bus, originally developed at MIT as a part of the NuMachine Workstation The 900 was replaced in 1992 with the Quadra 950, with a CPU speed of 33 MHz. Year 1992 ( MCMXCII) was a Leap year starting on Wednesday (link will display full 1992 Gregorian calendar) The Macintosh Quadra 950 was the third Desktop computer in Apple Computer 's Quadra line The line was joined by a number of "800-series" machines in a new mid-sized case, starting with the Quadra 800, and the "600-series" pizza-box desktop cases with the Quadra 610. The Macintosh Quadra 800 (Codenames "Fridge" "Wombat 33" also sold with bundled server software as the Apple Workgroup Server 80) is a The Macintosh Quadra 610 the Macintosh Centris 610 are two closely-related Personal computers that are a part of Apple Computer 's Quadra and
In 1993 the Quadra AV series was released, consisting of the 800-series Quadra 840AV and the 600-series Quadra 660AV, at 40 MHz and 25 MHz respectively. Year 1993 ( MCMXCIII) was a Common year starting on Friday (link will display full 1993 Gregorian calendar) The Macintosh Quadra 840AV (Codenames "Quadra 1000" "Cyclone" is a Personal computer that is a part of Apple Computer 's Quadra series The Macintosh Quadra 660AV (Codename "Tempest" is a Personal computer that is a part of Apple Computer 's Quadra series of Macintosh Both included an AT&T Digital signal processor and S-Video and composite video input and output ports for video, as well as CD-quality microphone and audio output ports. Before proposing a merge request please see Talk and see if the merger you propose has recently been made and A digital signal processor ( DSP or DSP micro) is a specialized Microprocessor designed specifically for Digital signal processing, generally Super Video or Separated Video abbreviated S-Video and also known as Y/C is an analog video signal that carries the video data as two separate Composite video is the format of an Analog television (picture only signal before it is combined with a sound signal and modulated onto an RF A Compact Disc (also known as a CD) is an Optical disc used to store digital data, originally developed for storing digital audio The AV models also introduced PlainTalk, consisting of the text-to-speech software MacinTalk Pro and speech control (although not dictation). PlainTalk is the collective name for several Speech synthesis ( MacInTalk) and Speech recognition technologies developed by Apple Inc. PlainTalk is the collective name for several Speech synthesis ( MacInTalk) and Speech recognition technologies developed by Apple Inc. However all of these features were poorly supported in software, and DSP was not installed in later AV Macs.
Branding
The Quadra name was also used for the successors to the Centris models that briefly existed during 1993: The 610, the 650 and the 660AV. Macintosh Centris was a set of three 1993 Macintosh models that were built around the Motorola 68LC040 and 68040 CPUs The Macintosh Quadra 610 the Macintosh Centris 610 are two closely-related Personal computers that are a part of Apple Computer 's Quadra and The Macintosh Quadra 650 and the Macintosh Centris 650 are two closely-related Personal computers that are a part of Apple Computer 's Quadra and The Macintosh Quadra 660AV (Codename "Tempest" is a Personal computer that is a part of Apple Computer 's Quadra series of Macintosh Centris was a "mid-range" series of systems between the Quadra on the high end and the LC on the low end, but it was later decided that there were too many product lines and the name was dropped. The Macintosh LC (meaning low-cost color) was Apple Computer 's product family of low-end consumer Macintosh Personal computers in the early 1990s Some machines of this era including the Quadra 605 were also sold as Performas, further adding to the confusion. The Quadra 605 is an entry level 68040 Microprocessor -based Apple Macintosh Personal computer code-named " Aladdin " The Macintosh Performa series was Apple Computer 's Consumer product family of Apple Macintosh Personal computers from 1992 until 1997 when the
The last use of the name was for the Quadra 630, which was a variation of the LC 630 using a "full" Motorola 68040 instead of the LC's 68LC040, and introduced together with it in 1994. The Macintosh Quadra 630 (Codenames "Crusader" "Show Biz" "Show & Tell" also sold with minor variations as the Macintosh LC 630 in The Motorola 68040 is a Microprocessor from Motorola, released in 1990. Year 1994 ( MCMXCIV) was a Common year starting on Saturday (link will display full 1994 Gregorian calendar) The 630 was the first Mac to use an IDE based drive bus for the internal hard disk drive, whereas all earlier machines had used SCSI. AT Attachment with Packet Interface ( ATA/ATAPI) is a standard interface used to connect storage devices such as Hard disks Solid-state A hard disk drive ( HDD) commonly referred to as a hard drive, hard disk, or fixed disk drive, is a Non-volatile storage device
The first three Apple Workgroup Server models, the WGS 60, the WGS 80 and the WGS 95 (mostly called "AWS 95" for "Apple Workgroup Server") were based on the Centris 610, the Quadra 800 and the Quadra 950, respectively. Apple Workgroup Server (AWS or sometimes WGS and later Macintosh Server, were the names given to selected models of Macintosh computers which were sold by
Timeline of Macintosh Quadra and Centris models
- See also: Timeline of Apple Macintosh models
Processor
The transition to the Motorola 68040 was not as smooth as the previous transitions to the Motorola 68020 or Motorola 68030. The Motorola 68020 is a 32-bit Microprocessor from Motorola, released in 1984. The Motorola 68030 is a 32-bit Microprocessor in Motorola 's 68000 family. Due to the Motorola 68040's split instruction and data caches, the Quadra had compatibility problems with self-modifying code (including relocating code, which was common under the Macintosh memory model). In Computer science, self-modifying code is code that alters its own instructions, intentionally or otherwise while it is executing. Historically the Mac OS used a form of Memory management that has fallen out of favour in modern systems Apple partially fixed this by having the basic Mac OS memory copy call flush the caches. This solved the vast majority of stability problems, but negated much of the Motorola 68040's performance improvements. Apple also introduced a variant of the memory copy call that did not flush the cache. [1] The new trap was defined in such a way that calling it on an older version of Mac OS would simply call the previous memory copy routine. The net effect of this was that many complex applications were initially slow or prone to crashing on the 68040, although developers quickly adapted to the new architecture by relying on Apple's memory copy routines rather than their own (or flushing the cache), and using the memory copy that did not flush the cache when appropriate (most of the time).
See also
- List of Macintosh models grouped by CPU type
- List of products discontinued by Apple Computer
- List of display interfaces
Footnotes
External links
- EveryMac.com - Macintosh Quadra series
- Lowendmac.com - Centris/Quadra Index
- Mac Guides - Quadra
- Jag's House - Macintosh Quadra 950
- Macintosh Quadra History
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