Macintosh 512Ke


At A Glance

Launched in April 1986, the Macintosh 512Ke (enhanced) was the same as the Macintosh 512K but with an 800K disk drive and 128K of ROM used in the Macintosh Plus. A Macintosh 512K could be upgraded to a 512Ke by purchasing and installing Apple’s $299 Macintosh Plus Disk Drive Kit. Read the original specifications of the Macintosh 512Ke at the Apple support site.

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Original Specifications


  • Microprocessor:
    • Motorola MC68000, 32-bit architecture, 8 (7.8336) MHz clock speed
  • Memory:
    • 512K of RAM (Random Access Memory)
    • 128K of ROM (Read Only Memory)
  • Disk Drive:
    • One built-in 800K disk drive. (Optional external 400K or 800K disk drive.)
  • Screen:
    • Built-in 9-inch diagonal, 512 by 342-pixel high-resolution bit-mapped monochrome display
  • Interfaces:
    • Mouse port, DB-9 connector
    • One eight-bit keyboard bus, 300 baud, RJ11 connector for Macintosh keyboard
    • Two RS-232/RS-422 serial ports, 230.4K baud maximum (up to 0.920 Mbit per second if clocked externally), DB-9 connectors
    • External Disk Drive interface (400K or 800K disk drives)
    • Sound port for external audio amplifier or headphones


  • Clock/Calendar:
    • CMOS custom chip with 4.5 volt battery backup (Eveready No. 523 or equivalent)
  • Electrical requirements:
    • Line voltage:  105 to 125 volts AC
    • Line frequency:  50 to 60 hertz
    • Maximum power:  60 watts
  • Environmentals requirements:
    • Operating temperature: 50 to 104 degrees F (10 to 40 C)
    • Storage temperature: -40 to 122 degrees F (-40 to 50 C)
    • Relative humidity: 5% to 90% relative humidity
    • Altitude: 15,000 feet (4615 meters)
  • Size & Weight:
    • Height: 13.5 inches (34.6 cm)v
    • Width: 9.7 inches (24.6 cm)
    • Depth: 10.9 inches (27.6 cm)
    • Weight: 16 lb. 8 oz. (7.5. kg)



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