The Macintosh Quadra 650, originally sold as the Macintosh Centris 650, is a

personal computer A personal computer (PC) is a multi-purpose microcomputer whose size, capabilities, and price make it feasible for individual use. Personal computers are intended to be operated directly by an end user, rather than by a computer expert or tec ...

designed, manufactured and sold by Apple Computer from February 1993 to September 1994. The Centris 650 was introduced alongside the smaller Centris 610 as the replacement for the Macintosh IIci, IIvi and

Quadra 700 The Macintosh Quadra 700 was a personal computer designed, manufactured and sold by Apple Computer from October 1991 to March 1993. It was introduced alongside the Macintosh Quadra 900, Quadra 900 as the first computers in the Macintosh Quadra, ...

, and it was intended as the start of the new midrange

Centris The genus ''Centris'' contains circa 250 species of large apid bees occurring in the Neotropical and Nearctic realms, from Kansas to Argentina. Most females of these bees possess adaptations for carrying floral oils rather than (or in addition ...

line of computers. Later in 1993, Apple decided to follow an emerging industry trend of naming product families for their target customers – Quadra for business, LC for education, and Performa for home – and folded the Centris 650 into the Quadra family. The Quadra 650 was discontinued without a direct replacement in September 1994, although the recently introduced

Power Macintosh 7100 The Power Macintosh 7100 is a personal computer that was designed, manufactured and sold by Apple Computer from March 1994 to January 1996. It is the mid-range machine of the first generation of Power Macintosh line, between the Power Macintos ...

, which has the same IIvx form factor as the 650, had a similar target audience and was sold in the same price range.

Models

Standard equipment on all Centris 650 models includes onboard video (with VGA support via an adapter), 3

NuBus NuBus (pron. 'New Bus') is a 32-bit parallel computer bus, originally developed at MIT and standardized in 1987 as a part of the NuMachine workstation project. The first complete implementation of the NuBus was done by Western Digital for th ...

slots, a

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 ...

, two ADB and two serial ports, and an external SCSI connector. There are four SIMM slots that support 4, 8, 16, and 32 MB SIMMs, allowing for a maximum of 132 or 136 MB of RAM depending on configuration. Ethernet-capable models have an

AAUI Apple Attachment Unit Interface (AAUI) is a mechanical re-design by Apple of the standard Attachment Unit Interface (AUI) used to connect Ethernet transceivers to computer equipment. AUI was popular in the era before the dominance of 10BASE-T ...

port.

System 7.1 System 7, codenamed "Big Bang", and also known as Mac OS 7, is a graphical user interface-based operating system for Macintosh computers and is part of the classic Mac OS series of operating systems. It was introduced on May 13, 1991, by Apple Co ...

was included as standard and is the minimum required version. Introduced February 10, 1993: * Macintosh Centris 650: Sold in five configurations: ** 25 MHz 68LC040, 4 MB RAM (onboard), 512 KB VRAM, 80 MB HDD, no Ethernet ** 25 MHz 68040, 8 MB RAM (4 onboard + 4 MB SIMM), 512 KB VRAM, 80 MB HDD, Ethernet ** 25 MHz 68040, 8 MB RAM (4 onboard + 4 MB SIMM), 512 KB VRAM, 230 MB HDD, Ethernet ** 25 MHz 68040, 8 MB RAM (4 onboard + 4 MB SIMM), 1 MB VRAM, 230 MB HDD, Ethernet, AppleCD 300i and microphone ** 25 MHz 68040, 24 MB RAM (4 onboard + 16 + 4 MB SIMMs), 1 MB VRAM, 500 MB HDD, Ethernet Introduced October 21, 1993: * Macintosh Quadra 650: 33 MHz 68040.

Models

Timeline

References

External links