- Macintosh Quadra
The Macintosh Quadra series was
Apple Computer's product family of professional high-end Apple Macintosh personal computers built using the Motorola 68040CPU from 1991 until the Power Macwas introduced in 1994. The product manager for the Quadra family was Frank Casanova who was also the Product Manager for the Macintosh IIfx. The first models were the Quadra 700and Quadra 900, both introduced in 1991. The Quadra replaced the Macintosh II seriesas the high end "professional" computer for the Macintosh product line.
The first computers to be part of the Macintosh Quadra series were the
Quadra 700and Quadra 900, both introduced in 1991with a Central processing unit(CPU) speed of 25 MHz. 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 NuBusexpansion slots and one PDS slot. The 900 was replaced in 1992with the Quadra 950, with a CPU speed of 33 MHz. 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.
1993the Quadra AV series was released, consisting of the 800-series Quadra 840AVand the 600-series Quadra 660AV, at 40 MHz and 25 MHz respectively. Both included an AT&T Digital signal processorand S-Videoand composite videoinput and output ports for video, as well as CD-quality microphoneand audio output ports. The AV models also introduced PlainTalk, consisting of the text-to-speech software MacinTalk Pro and speech control (although not dictation). However all of these features were poorly supported in software, and DSP was not installed in later AV Macs.
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. 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. Some machines of this era including the
Quadra 605were also sold as Performas, further adding to the confusion.
The last use of the name was for the
Quadra 630, which was a variation of the LC 630 using a "full" Motorola 68040instead of the LC's 68LC040, and introduced together with it in 1994. The 630 was the first Mac to use an IDE based drive bus for the internal hard diskdrive, whereas all earlier machines had used SCSI.
The first three
Apple Workgroup Servermodels, 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.
The transition to the Motorola 68040 was not as smooth as the previous transitions to the
Motorola 68020or Motorola 68030. 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). 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. [ [http://developer.apple.com/documentation/Hardware/DeviceManagers/pci_srvcs/pci_cards_drivers/PCI_BOOK.16a.html Apple Developer Connection - BlockMove 11] ] 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).
List of Macintosh models grouped by CPU type
List of products discontinued by Apple Computer
List of display interfaces
* [http://www.everymac.com/systems/apple/mac_quadra/ EveryMac.com - Macintosh Quadra series]
* [http://www.lowendmac.com/quadra/index.shtml Lowendmac.com - Centris/Quadra Index]
* [http://guides.macrumors.com/Quadra Mac Guides - Quadra]
* [http://www.jagshouse.com/quadra950.html Jag's House - Macintosh Quadra 950]
* [http://www.appletidbits.com/blog/2007/06/24/macintosh-quadra-history-part-1/ Macintosh Quadra History]
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Macintosh Quadra — 800 La serie de computadoras Macintosh Quadra de Apple Computer fue producto de la familia de computadoras profesionales de altas prestaciones Macintosh construidas usando el procesador Motorola 68040. Los primeros dos modelos de la serie; Quadra … Wikipedia Español
Macintosh Quadra — Macintosh Centris et Quadra Un Macintosh Centris 660AV Les Macintosh Centris et Macintosh Quadra sont des familles d ordinateur Macintosh commercialisés par Apple entre 1991 et 1995. Lancés en 1991, les Macintosh Quadra étaient destinés à… … Wikipédia en Français
Macintosh Quadra — 800 Der Macintosh Quadra 800 wurde im Zeitraum von Mai 1992 bis Oktober 1995 von der Firma Apple Computer verkauft. Der Rechner wurde mit dem Prozessor 68040 von Motorola ausgeliefert. Für den Speicher waren 8 Bänke mit 72 Pin SIMMs vorgesehen.… … Deutsch Wikipedia
Macintosh quadra 950 — Date de commercialisation 18 mai 1992 Prix au lancement 8 500 $ Arrêt de la production 14 … Wikipédia en Français
Macintosh quadra 900 — Date de commercialisation 21 octobre 1991 Prix au lancement 7 200 $ Arrêt de la production 18 mai 1992 … Wikipédia en Français
Macintosh Quadra 950 — Date de commercialisation 18 mai 1992 Prix au lancement 8 500 $ Arrêt de la production 14 octo … Wikipédia en Français
Macintosh quadra 700 — Date de commercialisation 21 octobre 1991 Prix au lancement 6 000 $ Arrêt de la production 15 … Wikipédia en Français
Macintosh Quadra 900 — Date de commercialisation 21 octobre 1991 Prix au lancement 7 200 $ Arrêt de la production 18 mai 1992 … Wikipédia en Français
Macintosh Quadra 610 — Macintosh Centris 610 Centris/Quadra 610 Date de commercialisation 10 février 1993 Prix au lancement 2 520 $ Arrêt de la production 18 … Wikipédia en Français
Macintosh Quadra 700 — Date de commercialisation 21 octobre 1991 Prix au lancement 6 000 $ Arrêt de la production 15 … Wikipédia en Français