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DISCUSSION Microprocessor -------------- - Motorola 68040, 32-bit architecture, 25 MHz clock speed - Integral Paged Memory Management Unit (PMMU), Floating Point Unit (FPU), and 8-kilobyte cache architecture Memory ------ - Comes with 4MB of RAM standard and 12 memory expansion slots for SIMMs (Single In-line Memory Modules). - Expandable to 64MB of RAM by installing 4MB SIMMs in the empty slots. Disk Drives ----------- - Built-in Apple SuperDrive 1.4MB floppy disk drive - 160MB or 400MB internal Apple SCSI hard disk drive (optional) - Support for up to three additional devices, such as a CD-ROM drive or SCSI hard disk drive (several capacities available) Video Display ------------- - Supports all Apple monochrome and color monitors, including: - Macintosh 12 Inch RGB Display - Macintosh 12 Inch Monochrome Display - AppleColor High-Resolution RGB Monitor - Macintosh Portrait Display - Macintosh Two-Page Monochrome Monitor - Macintosh 21 Inch Color Display - Supports some other non-Apple monitors, including VGA, NTSC, and PAL. Video RAM --------- - 1MB, upgradable to 2MB for display of more colors or shades of gray Interfaces ---------- - One Apple Desktop Bus (ADB) port, supporting a keyboard, mouse, and other devices daisy-chained through a synchronous serial bus - Two serial (RS-232/RS-422) ports, 230.4 kilobits per second maximum (up to 0.920 megabits per second if clocked externally) - SCSI bus interface - Video port to support RGB and monochrome monitors of various sizes and resolutions - Five internal NuBus expansion slots - One processor-direct slot provides access to the CPU for highest-possible performance. - Stereo sound output port capable of delivering sound to both channels of a stereo device - Sound input port for monaural sound input - Two audio line input ports (Stereo input is mixed to a monophonic signal.) - AUI-15 Ethernet connector Keyboard -------- - Supports all Apple Desktop Bus keyboards. Mouse ----- - Apple Desktop Bus Mouse; mechanical tracking, optical shaft, or contact encoding Sound Generator --------------- - Custom Sound Chip drives stereo miniature phone jack headphones or stereo equipment. Clock/Calendar -------------- - Custom chip with long-life lithium battery Microphone ---------- - Electret, omnidirectional; output voltage is 4 millivolts, peak to peak, at normal volume. Disability Access ----------------- - CloseView, Easy Access, and visible beep included with system software. These built-in features and third-party options provide alternative input and output tools for people with disabilities. Electrical Requirements ----------------------- - Line voltage: 100 to 240 volts AC, RMS automatically configured - Frequency: 59 to 60 Hz, single phase - Power: 303 watts maximum, not including monitor power ADB Power Requirements ---------------------- - Maximum current draw for all ADB devices: 500 milliamps (a maximum of three ADB devices is recommended) - Mouse draws 80 milliamps. - Keyboard draws 25 to 80 milliamps, depending on the keyboard model used. Operating Environment --------------------- - Operating temperature: 50 to 104 degrees F (10 to 40 degrees C) - Storage temperature: -40 to 116.6 degrees F (-40 to 47 degrees C) - Relative humidity: 20% to 80% noncondensing - Maximum altitude: 10,000 ft. (3,048m) Size and Weight --------------- - Main unit - Height 18.6 inches (47.3 cm) - Width 8.9 inches (22.4 cm) - Depth 20.6 inches (52.3 cm) - Weight 36 lb. 12 oz. (16.7 kg)* - Mouse - Height 1.1 inches (2.8 cm) - Width 2.1 inches (5.3 cm) - Depth 3.8 inches (9.7 cm) - Weight 6 oz. (.17 kg) * Weight is greater with an internal hard disk. Noise Level ----------- < 40 db (floor standing position) measured from the seated operator position. |
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| Document Information | |
| Product Area: | Computers |
| Category: | Macintosh Quadra & Centris |
| Sub Category: | Quadra 900 |
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