a.k.a. Centris 660av
- Got a 68040-based Mac? Join LEM's Vintage Macs Group.
Initially introduced as the Centris 660av (the two models are identical except for the nameplate), this computer shares the same case design as the Centris 610. In addition to a faster 25 MHz CPU, the 660av includes a 55 MHz AT&T digital signal processor, introduces the GeoPort high speed serial port, has a new audio-video connector on rear, and can digitize video using built-in ports. (For even more AV horsepower, look into the 40 MHz Quadra 840av.)
A dead or low-voltage PRAM battery can temporarily kill off built-in video - see Macintosh Computers: Low Battery Can Cause No Video for more information.
Tidbit: Hold down Cmd-Opt-T-V during startup to force this Mac to use a TV as a monitor.
- Centris 610 introduced 1993.07.29 at $2,300; renamed Quadra 660av 1993.10.01; discontinued 1994.09.12
- requires System 7.1 or later; highest version supported is Mac OS 8.1.
- CPU: 25 MHz 68040 CPU
- DSP: 55 MHz 3210
- performance: 12.4, relative to SE; 0.89, Speedometer 4
see Benchmarks: 660av for more details
- ROM: 2 MB
- RAM: 8 MB, expandable to 68 MB using 70ns 72-pin SIMMs; motherboard has 2 SIMM slots which can be filled independently. Cannot use 64 MB SIMMs
- VRAM: 1 MB
- L2 cache: optional
- ADB: 2 ports for keyboard and mouse
- serial: 2 DIN-8 RS-422 ports on back of computer
- SCSI: DB-25 connector on back of computer
- hard drive: 230 or 500 MB
- one PDS slot (NuBus adapter available)
- size (HxWxD): 3.4" x 16.3" x 15.6"
- weight: 14 lb.
- PRAM battery: 3.6V half-AA
- Gestalt ID: 53
- addressing: 24-bit or 32-bit
- upgrade path: Power Mac 6100
Accelerators & Upgrades
- Output Enablers 32-34 MHz clock accelerator
- MicroMac slot-free 128KB L2 cache
- MicroMac Speedy variable speed oscillator (to 29 MHz)
- Sonnet QuadDoubler (50 MHz 68040)
- Power Macintosh 6100
- Low End Mac's best classic Mac OS deals. Best online prices for System 6, 7.1, 7.5.x, Mac OS 7.6, 8.0, 8.1, 8.5, 9.0, 9.2.2, and other versions.
- Know your Mac's upgrade options, Phil Herlihy, The Usefulness Equation, 2008.08.26. Any Mac can be upgraded, but it's a question of what can be upgraded - RAM, hard drive, video, CPU - and how far it can be upgraded.
- The compressed air keyboard repair, Charles Moore, Miscellaneous Ramblings, 2008.07.24. If your keyboard isn't working as well as it once did, blasting under the keys with compressed air may be the cure.
- Tales of old Mac data retrieval, Adam Rosen, Adam's Apple, 2008.06.13. Getting apps and documents off 400K floppies, old disk images, and a Mac running System 5.
- A vintage Mac network can be as useful as a modern one, Carl Nygren, My Turn, 2008.04.08. Old Macs can exchange data and share an Internet connection very nicely using Apple's old LocalTalk networking.
- Vintage Mac networking and file exchange, Adam Rosen, Adam's Apple, 2007.12.19. How to network vintage Macs with modern Macs and tips on exchanging files using floppies, Zip disks, and other media.
- Vintage Mac video and monitor mania, Adam Rosen, Adam's Apple, 2007.12.17. Vintage Macs and monitors didn't use VGA connectors. Tips on making modern monitors work with old Macs.
- Getting inside vintage Macs and swapping out bad parts, Adam Rosen, Adam's Apple, 2007.12.14. When an old Mac dies, the best source of parts is usually another dead Mac with different failed parts.
- Solving Mac startup problems, Adam Rosen, Adam's Apple, 2007.12.12. When your old Mac won't boot, the most likely culprits are a dead PRAM battery or a failed (or failing) hard drive.
- The 25 most important Macs (part 2), Dan Knight, Mac Musings, 2009.02.17. The 25 most significant Macs in the first 25 years of the platform, continued.
- Golden Apples: The 25 best Macs to date, Michelle Klein-Häss, Geek Speak, 2009.01.27. The best Macs from 1984 through 2009, including a couple that aren't technically Macs.
- Why you should partition your Mac's hard drive, Dan Knight, Mac Musings, 2008.12.11. "At the very least, it makes sense to have a second partition with a bootable version of the Mac OS, so if you have problems with your work partition, you can boot from the 'emergency' partition to run Disk Utility and other diagnostics."
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- Making floppies and CDs for older Macs using modern Macs, Windows, and Linux PCs, Tyler Sable, Classic Restorations, 2007.03.15. Older Macs use HFS floppies and CDs. Here are the free resources you'll need to write floppies or CDs for vintage Macs using your modern computer.
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- Quadra AVs and some cool things you can do with them, Adam Robert Guha, Apple Archive, 2001.08.10. Thanks to digital signal processors, the Quadra AVs remain useful video machines.
- 660av/840av Video Input Specifics, James Wang.
- Quadra AV FAQ, James Wang
- Options For '040s, Adam Robert Guha, Apple Archive, 2000.06.05. Advice about operating systems, upgrades, what Quadra to choose, and more.
- Games for '040s, Low End Mac Gaming, Brian Rumsey, 2000.02.25. This week Brian looks at games to play on 68040-based Macs.
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- Six Year Old Mac to the Rescue, Scott Atkinson, Mac Musings, 1999.11.12. The Quadra 660av has what it takes to capture stills from video for a television Web site.
- 72-pin SIMM memory pricing, ramseeker
- Vintage Macs, the email list for 68040-based Macs
- Mac AV list, an email list for 660av and 840av users
- Centris 610, 650, 660av Differences, Apple Knowledge Base Archive
- Macintosh AV Series: Video Features and Subsystems, Apple Knowledge Base Archive
- Memory Upgrade Guide
- For more information on Mac serial ports, read Macintosh Serial Throughput
- Macintosh Centris 660av Technical Specifications, Apple Knowledge Base Archive
- Macintosh Quadra 660av Technical Specifications, Apple Knowledge Base Archive
- The Startup Disk control panel in System 7.5-7.5.3 is incompatible with Quadra AVs. System 7.5.5 fixes this.
- Quadra AVs do not support 24-bit addressing.
- You must have a "fat" system installed to use a PowerPC upgrade.
- Note that the 660av and 840av don't do video mirroring, so if you're doing output to TV or VCR, your computer monitor will be blank.
- The fan filter for the 660 and other models that use the same case is inside the power supply. Sometimes a "bad" power supply can be repaired by clearing the dust out of the mesh screen near the fan.
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