Quadra 610 DOS Compatible
- Got a 68040-based Mac? Join LEM's Vintage Macs Group.
Take the fairly popular Quadra 610, add an IBM-compatible on a card, and you have the Quadra 610 DOS Compatible. Apple introduced this as an experiment, to see if there was sufficient demand. Production of 25,000 units was quickly snapped up by the enthusiastic marketplace.
- introduced February 1994; discontinued May 1995
- requires System 7.1 or later; highest version supported without a PPC upgrade is Mac OS 8.1.
- CPU: 25 MHz 68040 CPU; 25 MHz 80486
- performance: 12.1 (relative to SE)
- ROM: 1 MB
- RAM: 4 MB on motherboard, expandable to 68 MB using 80ns 72-pin SIMMs; motherboard has 2 SIMM slots, which can be filled independently; can use 4 MB, 8 MB, 16 MB, and 32 MB SIMMs. If SIMMs are not the same speed, faster SIMM should be in bank 0 (frontmost slot).
- DOS card has 72-pin SIMM slot for dedicated RAM
- video: 512 KB VRAM, expandable to 1 MB
- 512 x 384 @ 16-bit
- 640 x 480, 800 x 600, 832 x 624: 8-bit @ 512 KB, 16-bit @ 1 MB
- 832 x 624, 1024 x 768, 1152 x 870: 4-bit @ 512 KB, 8-bit @ 1 MB
- L2 cache: none
- 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
- one PDS slot (occupied by DOS card)
- 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 PDS card, Power Mac 6100 (requires some case modification)
Accelerators & Upgrades
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- 72-pin SIMM memory pricing, ramseeker
- Vintage Macs, the email list for 68040-based Macs
- Memory Upgrade Guide
- MacWindows, a site dedicated to Mac users running Windows
- Macintosh DOS Compatibility Card, Marc Schrier. Advice on clock chipping and CPU replacement on the DOS card.
- Houdini FAQ, Anton Prastowo
- MicroMac PM6100 Logic Board Upgrade, MicroMac, 1998.08.11. Everything you need to know about dropping in a Power Mac 6100 motherboard.
- Quadra 610 DOS Compatible Technical Specifications, Apple Knowledge Base Archive
- You must have a "fat" system installed to use a PowerPC upgrade.
- If you have a non-Apple hard drive formatted with Silverlining, read this warning.
- This case has poor air circulation, which can cause replacement hard drives or accelerators to overheat. If this happens, the first thing to try is removing the small horizontal insert on the back. If this fails, look into replacing the fan in the power supply (contact Newark Electronics at 1-800-463-9275 for information on their 25cfm fan) or moving the hard drive to the CD-ROM bay (assuming you don't have a CD-ROM player).
- Serial port normally restricted to 57.6 kbps; throughput with a 56k modem may be limited. See 56k modem page. For more information on Mac serial ports, read Macintosh Serial Throughput on the Online Tech Journal.
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