Quadra
Quadra may refer to:
Macintosh Quadra 630
The Macintosh Quadra 630 (Codenames: "Crusader", "Show Biz", "Show & Tell"; also sold with minor variations as the Macintosh LC 630 in the educational market and as the Macintosh Performa 630 in the consumer market) is a personal computer that is a part of Apple Computer's (now Apple Inc.) Quadra series of Macintosh computers. It was introduced in July 1994, replacing the Quadra 610, and was discontinued in October 1995 with no direct replacement; however, the Power Macintosh 6200 and its Performa versions took a very similar position in Apple's product lineup later, and continued using the new case introduced with the 630. The case design made the system's motherboard accessible by opening a cover at the bottom rear of the case and sliding out a drawer that the motherboard was mounted on.
The 630 was the last Quadra Macintosh introduced, though the earlier 950 remained available longer. A big change compared to previous Macintosh models was the choice of the internal hard drive interface: conforming to the standards of the IBM PC compatible platform, cheaper, but slower IDE drives were used instead of SCSI for the first time. An external SCSI port was still available on the machines, and the CD-ROM used SCSI internally, but the 630 used an older controller that was much slower than the ones used in higher-end Macs of the time.
