Lisa 2


At A Glance

The Apple Lisa was designed to be the first personal computer with a GUI aimed at the business customer. It featured a 68k CPU, support for 2MB RAM and supported external storage drives such as the Apple Profile.

 

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Original Specifications


  • Display:
    • 12-inch (305mm) screen
    • Full-screen bit-mapped display
    •    – High resolution black-on-white display
    •    – 364 lines by 720 dots
    •    – up to 40 lines of 132 characters each
    • 60 Hz refresh rate
    • 64 levels of contrast
    • Anti-glare filter
  • Keyboard:
    • Detached, standard typewriter-style keyboard with N-key rollover
    • Sculptured keytops (textured, nonslip, nonglare)
    • 10-key numeric keyboard
    • Full ASCII character set with up to 76 keys
    • All keys programmable for special characters or functions
  • Floppy-disk storage:
    • Built-in 400-kilobyte microdisk drive
    • 3/5 inch media
    • Automatic head loading and disk eject under software control
    • Smart interface with 6504 processor
  • Hard-disk storage options:
    • Lisa 2/10 comes standard with a built-in, high-speed 10 megabyte hard-disk drive
    • External high-speed 5-megabyte hard-disk drive (optional on Lisa 2 and Lisa 2/10)
  • Mouse:
    • Provides extremely fast cursor positioning
    • Eliminates the need to learn commands
    • Has only one button, to avoid confusion
    • Works well on any surface
    • Requires a space on your desktop on 6.5 inches by 5.75 inches
  • Main processor:
    • MC68000 32-bit central processing unit
    •    – 32-bit internal architecture
    •    – 16-bit external data path
    •    – 7 levels of interrupt
  • Computer console: weight and dimensions
    • Computer console
    •    – 55lb (25 kg) maximum
    •    – 13.75 inches (350mm) high
    •    – 18.5 inches (475mm) wide
    •    – 15.25 inches (388mm) deep or 16 inches with keyboard in storage position
  • Keyboard: weight and dimensions:
    • Keyboard
    •    – 4 lb. (1.8 kg)
    •    – 2.5 inches (68mm) high
    •    – 18.5 inches (475mm) wide
    •    – 6.5 inches (165mm) deep
  • Power requirements:
    • 115V or 230V AC
    • 48 to 68 Hz
    • 150W maximum

  • Environmental requirements:
    • Ambient temperature of 40° to 108°F (5° to 42°C)
    • Relative humidity of 15% to 80% noncondensing
  • Real-time clock:
    • Software system on-off control
    • Interval and event timing
  • Memory:
    • 16 kilobytes of startup ROM (read-only memory)
    • 512K expandable to 1Mb of main memory or RAM (random-access memory)
    • 512K add-on memory board
    • Parity error detection
  • Memory management:
    • Important component of multitasking systems
    • Permits operating system to relocate segments in memory
    • Provides access controls for blocks of memory
    • Segmentation into 128 variable-length blocks dynmically controlled by memory map table
  • Communications interface:
    • Two high-speed (up to 244 kilobits/second) serial ports
    •    – Synchronous and asynchronous modes
    •    – RS-232C with half or full duplex channels
    •    – Full modem control and ring indicator on one channel
    •    – Software-programmable baud rates
    • One parallel port (that port is routed to the built-in hard-disk drive in Lisa 2/10)
  • Audio output:
    • Built-in speaker with sofware-controlled tone generator
  • Expansion board slots:
    • Three slots
    • Zero-insertion-force connectors
    • Direct connection to system bus
    • DMA capability
    • Memory-mapped input/output
    • Vector interrupt capability
    • Direct connection to power supply
    •    – digital ground
    •    – +5V, -5V, +12V, -12V
    •    – allows up to 15W total (maximum rating) for all three cards
    •    – +5V standby (at 50 mA) per board
  • Configurations:
    • Lisa 2 comes standard with 512K of main memory (RAM) and a built-in 400-kilobyte microdisk drive. Lisa 2/10 comes standard with ½ megabyte of main memory (RAM), a built-in 400-kilobyte microdisk drive, and a built-in 10-megabyte hard-disk drive
    • Both systems can be upgraded to 1 megabyte of RAM by adding ½-megabyte Add-On Memory Board. (Note that one or more of the seven applications in the Lisa Office System – LisaCalc, LisaDraw, LisaGraph, LisaList, LisaProject, LisaTerminal and LisaWrite – require 1 megabyte of RAM and a hard-disk drive)
    • External hard-disk drives may be added to any Lisa system



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Wikipedia

For the Wikipedia entry on the LIsa 2 click here
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