Macintosh Quadra 605
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| Release date | October 21, 1993 |
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| Introductory price | 970, 1000, 1300 |
| Discontinued | October 17, 1994 |
| Operating system | Mac OS 7.1-7.5.1, 7.5.3, 7.5.5-8.1 or with PowerPC upgrade, Mac OS 9.1 |
| CPU | Motorola 68LC040 @ 25 MHz |
| Memory | 4 MB, expandable to 36 MB (official) or 132 MB (later) (80 ns 72-pin SIMM) |
The Quadra 605 is an entry level 68040 microprocessor-based Apple Macintosh personal computer code-named "Aladdin" or "Primus" which was released on October 21, 1993 as part of the Quadra series and discontinued on October 16, 1994. It is one of few Macintosh models to not share a case with another machine (although the internal layout is shared with the Performa/LC 475 family.)
Recording is possible at 11 or 22 k samples/second, with filters applied at 3.5 kHz and 7 kHz respectively while recording.
The Quadra 605 contains one LC III style 68030-compatible LC Processor Direct Slot. While this is mechanically compatible with previous models' LC PDS (it will take 96-pin or 114-pin LC PDS slot cards) it is not a true LC PDS, but emulates the previous machine's 68030 slot. Due to the success of the LC PDS in earlier Macs and with many expansion options already manufactured, Apple kept the same slot type in these 68040 machines. While the Quadra 605's LC PDS is mostly 68030 compatible, expansion cards made specifically for 030 processors such as 68881 or 68882 FPUs will not work. In addition it could utilize the Apple IIe Card, which allowed the 605 to emulate an Apple IIe.
The Quadra 605 has one SCSI bus, with a 50 pin internal connector (with space for one low profile 3.5" SCSI device) and one 25-pin DB25F external connector. SCSI is provided by an NCR 53C96 controller, which can achieve 6 MB/s internally with a fast enough drive, or 4 MB/s externally.
Two serial ports are provided on a Quadra 605; one 8 pin Mini-DIN Printer port and one 9 pin Mini-DIN Modem port similar to the Printer port, but with an extra pin to supply +5 V power from the ADB power supply. Apple recommends no more than 100 mA should be drawn from this pin.
The Quadra 605, like most other Macintoshes manufactured before 1999, includes an Apple Desktop Bus port for use with a keyboard/mouse or other low-speed low-power peripherals. Devices may be powered from the ADB port; Apple recommend a maximum combined current draw of 200 mA over a maximum of three ADB devices.
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