The Quadra 605 is an Apple Macintosh personal computer based on the Motorola 68LC040 CPU released on October 21, 1993 as part of the Quadra series. During development it was code-named “Aladdin” or “Primus”

With an elegant, minimalistic design the Quadra 605 is one of the few Macintosh models that does not share a case with another model, however the internal layout and components are identical to the Apple Macintosh Performa/LC 475 and 476.

Production of the Quadra 605 was discontinued on October 17, 1994.

SPECIFICATIONS

Complete system specifications

OPERATING SYSTEMS

Download operating systems compatible with the Quadra 605

HARDWARE UPGRADES

Various upgrades and modifications to Quadra 605 hardware

PHOTO GALLERY

Photographs of Quadra 605 hardware

EMULATOR

Basilisk II is a Macintosh 68k emulator that allows you to run the classic Macintosh OS and applications on modern computers. These downloads are fully configured versions of Basilisk II that include the required ROM as well as a hard drive image with Mac OS 8.1 and various applications.

DOWNLOADS

Mac OS System 7.6.1 CD – bootable retail CD image (.iso)
Mac OS System 8.1 CD – bootable retail CD image (.iso)
Apple Legacy Software Recovery CD – bootable CD image (.iso) with every Mac OS from 1.0 through 8.1
Basilisk II Emulator for macOS – fully configured 68k emulator with Quadra ROM and hard drive image with System 8.1 installed
Basilisk II Emulator for Windows – fully configured 68k emulator with Quadra ROM and hard drive image with System 8.1. installed
Quadra 605 ROM – for use with emulators such as Basilisk II

DOCUMENTATION

TROUBLESHOOTING

No video on startup: If you hear the startup chord but video never initializes, the logic board battery is probably dead.
- Temporary workaround: Flip the power switch on and then quickly toggle the switch off and then on again. The system should then boot up normally.
- Solution: Replace the logic board battery with a 3.6v 1200mAh 1/2AA lithium battery
Vertical lines, horizontal lines or snow on video
- Solution 1: Check cable connecting monitor to video port
- Solution 2: Reseat VRAM SIMMs
- Solution 3: Replace VRAM SIMMs
Eight-tone error chord at startup
- Solution 1: Reseat RAM SIMM
- Solution 2: Replace RAM SIMM

SHOPPING

MicroMac
eBay Quadra 605 multi-search
Part Numbers
- M1821LL/A – Macintosh Quadra 605 with 4MB RAM, 512K VRAM, and internal 80MB hard disk drive
- M1822LL/A – Macintosh Quadra 605 with 8MB RAM, 512K VRAM, and internal 160MB hard disk drive
- M0517LL/A – VRAM Expansion Kit (two kits required for expansion to 1MB VRAM)
- M1507LL/A – 4MB DRAM Expansion Kit
- M1508LL/A – 8MB DRAM Expansion Kit
- M2460Z/A – Apple Ethernet LC Twisted-Pair Card
- M9060LL/A – Apple PlainTalk Microphone