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- Macintosh LC Technical Specifications
-
- Copyright 1990, Apple Computer, Inc.
-
- The Macintosh LC comes with 2 megabytes of RAM (expandable to 10 megabytes),
- internal 1.4-megabyte Apple SuperDrive floppy disk drive, internal 40-megabyte
- hard disk drive, ADB keyboard and mouse, system software, and training disk.
-
- The Macintosh LC comes with 2 megabytes of RAM on the main logic board. Up to
- 8 megabytes of RAM can be added by installing a memory expansion card and then
- adding SIMMs. Some possible configurations include:
-
- -- 4 megabytes (2 megabytes on main logic board; two 1-megabyte SIMMs)
-
- -- 10 megabytes (2 megabytes on main logic board; two 4-megabyte SIMMs)
-
- The SCSI (Small Computer System Interface) bus can support up to seven
- peripheral devices.
-
- The Macintosh LC provides full ROM support for all AppleTalk protocols and
- includes built-in serial ports for LocalTalk network connections.
-
- Macintosh system software includes:
-
- -- System software version 6.0.6 or later (the Macintosh Operating System)
- with System Startup disk
-
- -- System Additions disk (includes utilities such as the Apple File Exchange,
- HD SC Setup, CloseView, Disk First Aid, and Font/DA Mover)
-
- The Macintosh LC accepts and processes sound, and generates sound. Using a
- microphone or phono jack adapter, and appropriate software, you can speak into
- the computer to create electronic voice messages and add voice comments to
- files. Sound entering the computer is filtered through a custom
- filter/preamplifier chip, converted to digital form, and stored in DRAM or
- directly on the hard disk. The sound generator is a sampling generator that
- provides the sound signal to the internal speaker to both channels of stereo
- mini-phone-jack headphones.
-
- Microprocessor
-
- -- MC68020, 32-bit architecture
-
- -- 16-megahertz clock speed
-
- Memory
-
- -- 2 megabytes of RAM, expandable to 4 or 10 megabytes
-
- -- 512K of ROM, socketed for future ROM upgrades
-
- -- 265 bytes of parameter memory
-
- Disk Drives
-
- -- Built-in Apple SuperDrive 1.4-megabyte floppy disk drive
-
- -- Internal 40-megabyte Apple SCSI hard disk drive
-
- -- Optional external Apple SCSI hard disk (many capacities available)
-
- Monitors
-
- -- Supports several color and monochrome monitors, including: Macintosh 12"
- RGB Display, Macintosh 12" Monochrome Display, and AppleColor High-Resolution
- RGB Monitor.
-
- -- When equipped with a video expansion card, supports other Apple and
- non-Apple monitors; see your authorized Apple dealer for details.
-
- Interfaces
-
- -- One Apple Desktop Bus (ADB) port, supporting a keyboard, mouse, and other
- devices daisy-chained through a low-speed, synchronous serial bus (a maximum of
- three daisy-chained devices is recommended)
-
- -- Two serial (RS-232/RS-422) ports, 230 kilobits per second maximum (up to
- 0.920 megabits per second if clocked externally)
-
- -- Video port, supporting color and monochrome monitors of various sizes and
- resolutions
-
- -- SCSI interface, using a 50-pin internal connector and a DB-25 connector for
- the first external device; all subsequent SCSI-based peripheral devices use
- standard SCSI-to-SCSI interface cables.
-
- -- Internal expansion slot, supporting an 020 Direct Slot expansion card
-
- -- Monophonic sound output port for external audio devices
-
- -- Sound input port for monaural sound input
-
- Sound Input
-
- -- Monaural 8-bit sound
-
- -- Sound samples can be made at 22 or 11 kilohertz.
-
- -- Macintosh Audio Compression Expansion (MACE) sound utility, supporting 3:1
- or 6:1 compression, which allows approximately half an hour of sound to be
- stored on a single 40-megabyte hard disk
-
- Sound Generator
-
- -- Monophonic 8-bit digital-analog conversion using 22-kilohertz sample rate -
- capable of supplying the same signal to both channels of stereo headphones or
- other stereo equipment through the sound jack
-
- Microphone
-
- -- "Hands free" omnidirectional electret microphone
-
- Keyboard
-
- -- ADB keyboard with numeric keypad
-
- -- Two-level tilt adjustment
-
- Mouse
-
- -- Apple Desktop Bus Mouse; mechanical tracking: optical shaft or contact
- encoding; 100 + or - 10 pulses per in. (3.9 + or - 0.39 pulses per mm) of
- travel
-
- Electrical Requirements
-
- -- Line voltage: 90 to 240 volts AC, RMS
-
- -- Frequency: 47 to 63 hertz, single phase
-
- -- Power: 50 watts maximum, not including monitor power
-
- ADB Power Requirements
-
- -- Maximum power draw for all ADB devices: 200 milliamps (a maximum of three
- ADB devices, daisy-chained to the port, is recommended)
-
- -- Mouse draws 80 milliamps.
-
- -- Keyboard draws 25 milliamps.
-
- Main Unit Size and Weight
-
- -- Height: 3.0 in. (7.7 cm)
-
- -- Width: 12.2 in. (31.0 cm)
-
- -- Depth: 15.0 in. (38.2 cm)
-
- -- Weight: 8.8 lb (4.0 kg)
-
- Mouse Size and Weight
-
- -- Height: 1.1 in. (2.8 cm)
-
- -- Width: 2.1 in. (5.3 cm)
-
- -- Depth: 3.8 in. (9.7 cm)
-
- -- Weight: 6 oz. (.17 kg)
-
- Keyboard Size and Weight
-
- -- Height: 1.8 in. (4.4 cm)
-
- -- Width: 16.5 in. (41.8 cm)
-
- -- Depth: 5.6 in. (14.2 cm)
-
- -- Weight: 2 lb. (1 kg)
-
- 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. (3,048 m)
-
- Order Number M0442LL/A
-
- New Prod Highlights
- 10-15-90
-