Macintosh Quadra 660AV
_Quadra_660_AV_(1993).jpg) | |
| Quadra 660AV with display, keyboard and mouse at the Apple Museum, Prague (photo: Benoît Prieur, CC0, via Wikimedia Commons) | |
| Specifications | |
|---|---|
| Manufacturer | Apple Computer, Inc. |
| Type | Desktop personal computer |
| Released | October 1993 (renamed from the Centris 660AV) |
| Discontinued | September 12, 1994 |
| Intro price | US$1,970 to US$2,400 |
| CPU | Motorola 68040 at 25 MHz, with FPU; AT&T DSP3210 at 55.5 MHz |
| Memory | 4 MB on the logic board, two 72-pin SIMM slots; 68 MB maximum (70 ns) |
| Storage | 80 to 500 MB SCSI hard disk; 1.4 MB SuperDrive; optional internal CD-ROM |
| Display | Built-in video, 1 MB VRAM soldered (not expandable); composite and S-video in and out |
| Sound | 16-bit stereo input and output |
| ROM | 2 MB |
| Connectivity | Built-in Ethernet (AAUI-15); GeoPort on the modem port |
| Expansion | One slot: PDS, or one 7-inch NuBus card through an adapter |
| Power | 86 W |
| Dimensions | 8.5 × 41.5 × 39.7 cm (3.4 × 16.3 × 15.6 in) |
| Weight | 6.4 kg (14.0 lb) |
| OS / Firmware | System 7.1 with System Enabler 088 to Mac OS 8.1 |
| Predecessor | Macintosh Centris 660AV |
| Successor | Power Macintosh 6100 (6100/60AV) |
| Model no. | M9040 |
The Macintosh Quadra 660AV is the Macintosh Centris 660AV renamed. Apple dropped the Centris name in October 1993 and sold the machine as the Quadra 660AV until September 12, 1994.[1][2] Apple's specification page gives the introduction as October 1, 1993 and EveryMac as October 21, 1993. The two machines share one Service Source and one developer note, and use the low-profile case of the Macintosh Centris 610.[3][4] Its larger sibling is the Macintosh Quadra 840AV.
Identification
[edit | edit source]| Item | Value |
|---|---|
| Model number | M9040[2] |
| Order number | M2691LL/A (500 MB hard disk)[2] |
| Gestalt ID | 60[1] |
| ROM | 2 MB, ID $077D, version $10[1] |
| Original system software | System 7.1 with System Enabler 088 v1.1[1] |
AV hardware
[edit | edit source]From Apple's developer note for the Quadra 840AV and Centris 660AV:[4]
- An AT&T DSP3210 digital signal processor, used for speech recognition, sound compression and telephony. On the 660AV it runs at 55.5 MHz (66.67 MHz on the 840AV).
- Video input and output: the machines can process composite or S-video input and provide NTSC and PAL composite and S-video outputs.
- 16-bit stereo sound input and output at sample rates up to 48 kHz, including 44.1 kHz.
- GeoPort on one serial port (the modem port, a 9-pin mini-DIN) for analog, ISDN, fax and data telephone lines.
- 2 MB of ROM holding some system software that other Macintosh models load from disk.
- A floppy controller based on the Industry Standard 765, reading and writing both Apple GCR and DOS MFM formats.
Apple's specification page lists one GeoPort, one ADB port, and a PlainTalk microphone.[1]
Memory and storage
[edit | edit source]- RAM: 4 MB on the logic board and two 72-pin SIMM slots taking 4, 8, 16 or 32 MB SIMMs, 70 ns or faster; 68 MB maximum. The standard 8 MB is 4 MB on board plus a 4 MB SIMM.[1][3]
- Video RAM: 1 MB, soldered to the logic board as two banks of 512K; it cannot be expanded.[3]
- Hard disk: the Service Source lists an 80 or 500 MB 3.5-inch internal SCSI disk; Apple's specification page gives 80-500 MB. An internal 5.25-inch CD-ROM drive was optional.[3][1]
The Service Source's memory page gives the ROM as 1 MB; the developer note and Apple's technical specifications give 2 MB.[3][4][1]
| Resolution | Bits per pixel |
|---|---|
| 512 × 384 | 24 |
| 640 × 400 | 24 |
| 640 × 480 | 16 |
| 800 × 600 | 16 |
| 832 × 624 | 16 |
| 1024 × 768 | 8 |
| 1152 × 870 | 8 |
Source: Apple technical specifications.[1]
Expansion
[edit | edit source]The single internal slot takes a processor-direct card, or one short NuBus card through an optional angle adapter; a digital audio/video (DAV) connector in line with the slot gives a card direct access to YUV video data and digital sound.[4][3]
Power and battery
[edit | edit source]Apple rates the machine at 86 W, from 100-240 V AC at 50-60 Hz; Apple's specification page adds 1.7 A and an AC pass-through outlet.[3][1] Apple's battery check is to replace the PRAM battery below 3.2 V; the cell is a 3.6 V lithium type, whose leakage is neutralised with bicarbonate of soda, not vinegar.[3][1]
Service documentation
[edit | edit source]- Centris 660AV/Quadra 660AV Service Source[3]
- Macintosh Quadra 840AV and Centris 660AV Developer Note[4]
- Macintosh Quadra 660AV Schematic: Apple's logic board schematic, drawing 051-0124-A (31 sheets, board 820-0453-B), and the NuBus adapter card schematic, 051-0126-A (five sheets, board 820-0454-A)[5]
General maintenance, capacitors and troubleshooting
[edit | edit source]The Quadra 660AV is the same hardware as the Centris 660AV; use:
- Macintosh Centris 660AV General Maintenance
- Macintosh Centris 660AV Capacitor Replacement Guide
- Macintosh Centris 660AV Troubleshooting, including the battery section
Related pages
[edit | edit source]References
[edit | edit source]- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 Macintosh Quadra 660AV: Technical Specifications, Apple—link(accessed 2026-09-30)
- ↑ 2.0 2.1 2.2 Macintosh Quadra 660AV Specs, EveryMac.com—link(accessed 2026-09-30)
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 Apple Computer, Centris 660AV/Quadra 660AV Service Source, hosted as File:Quadra.centris_660av.pdf (see Centris 660AV/Quadra 660AV Service Source). Specifications chapter; Additional Procedures, Battery Verification.
- ↑ 4.0 4.1 4.2 4.3 4.4 Apple Computer, Macintosh Quadra 840AV and Macintosh Centris 660AV Developer Note, hosted as File:Macintosh_Quadra_840AV_and_Centris_660AV_Developer_Note.pdf (see Macintosh Quadra 840AV and Centris 660AV Developer Note). Chapter 1, "Summary of Features", pp. 4-6; chapter 2, "Functional Units" (DSP clock) and "Serial Ports" (GeoPort).
- ↑ Apple Computer, The Tempest logic board schematic, drawing 051-0124-A, sheets 1–31 (board 820-0453-B), and The Tempest NuBus schematic, drawing 051-0126-A, sheets 1–5 (board 820-0454-A). Hosted as File:Macintosh Quadra 660AV Schematic.pdf.