Macintosh Centris 660av
Information about my old Macintosh 68040 Computer
In the early 1990s, I purchased a refurbished Centris 660av computer from a store in New Hampshire. I originally intended to buy a refurbished Quadra 610, but they were out of stock. The salesperson recommended the Centris 660av instead, as it was similarly priced and slightly better due to its AV capabilities.
When I moved to California in 1996, I brought the computer with me. I used it frequently until I bought the 8600/200 a few years later. I used the Centris 660av to encode many of the Real Audio files found on this site. Additionally, I used it as my answering machine and to digitize my voicemail.
Today, the computer sits unused in my home office. I need to find a monitor that works with it, as I currently don't have a VGA monitor. Perhaps I'll find one on Craigslist or somewhere similar.
This is the last pre-PowerPC computer that I would ever buy. This is also the only computer that I currently have that still runs System 7 - so I do want to boot it up some day to take a look back at the classic Macintosh.
I don't know if the hard drive works, but I did back everything to a CD.
Computer Specifications
- CPU: 25MHz 68040 CPU
- DSP: 55MHz 3210
- ROM: 2MB
- RAM: 8MB, expandable to 68MB using 70ns 72-pin SIMMs; motherboard has 2 SIMM slots which can be filled independently
- VRAM: 1MB
- L2 cache: optional
- ADB ports for keyboard and mouse
- DIN-8 serial ports on back of computer
- DB-25 SCSI connector on back of computer
Microprocessor
- Motorola 68040, running at 25 MHz
- Integrated floating-point unit, Page Memory Management Unit (PMMU), and 8KB cache
Digital signal processor
- AT&T 3210, running at 55 MHz
Memory
- Comes with 8MB of RAM
- Can be expanded to up to 68MB of RAM with 32MB SIMMs (dealer installation required)
Disk drives
- One built-in Apple SuperDrive 1.4MB floppy disk drive that uses high-density floppy disks and reads, writes, and formats Macintosh, MS-DOS, OS/2, and ProDOS disks
- One internal hard disk (80MB, 230MB, and 500MB options available)
- Optional internal Apple CD-ROM drive
- Optional external SCSI hard disk drive (many capacities available)
Displays supported
- All Apple displays up to 21 in.
- A wide range of third-party displays, including NTSC, PAL, VGA, and SVGA monitors Video RAM (VRAM)
- 1MB standard
Color depth support
- 16-bit; permits display of thousands of colors on monitors up to 16 in., and up to 256 colors on 21 in.
Interfaces
- One internal NuBus expansion slot via NuBus adapter, which includes support for digital audio video (DAV) connector
- One Apple Desktop Bus (ADB) port, supporting a keyboard, mouse, and other devices
- AAUI-15 Ethernet connector
- Two serial (RS-232/RS-422) ports
- Two S-Video and two composite video ports, one each for input and output
- SCSI interface for connecting up to a total of seven SCSI devices
- Sound-out port for stereo playback from CDs or Macintosh audio applications
- Stereo sound-input port (supports 16-bit stereo audio)
Networking
- Built-in Ethernet
- Serial port for AppleTalk
- Integrated GeoPort telecommunications architecture for data, fax, and voice connectivity
Sound generator
- DSP-based 16-bit stereo audio
- Sample rates: 8 kHz to 48 kHz
Keyboard and mouse
- Several Apple Desktop Bus keyboards with numeric keypads available
- Apple Desktop Bus Mouse II
Clock/calendar
- Custom integrated circuit with long-life lithium battery
Electrical requirements
- Line voltage: 100 to 240 VAC, RMS single phase, automatically configured
- Frequency: 47 to 63Hz, single phase
- Power: 86 W maximum, not including monitor power
ADB power requirements
- Maximum current draw for all Apple Desktop Bus devices: 500mA (a maximum of three Apple Desktop Bus devices is recommended)
- Mouse draws 10mA
- Keyboard draws 25-80mA (varies with keyboard model used)
Size and weight
- Height: 3.4 in. (8.5 cm)
- Width: 16.3 in. (41.5 cm)
- Depth: 15.6 in. (39.7 cm)
- Weight: 14.0 lbs (6.4 kg) (Weight varies based on internal devices installed)
Operating environment
- Operating temperature: 50? to 104? F (10? to 40? C)
- Storage temperature: -40? to 116.6? F (-40? to 47? C)
- Relative humidity: 5% to 95%, noncondensing
- Maximum altitude: 10,000 ft. (3,048 m)