Apple · Macintosh

Macintosh LC III

Released 1993

The third LC desktop added a 25 MHz 68030, a 32-bit data path and support for up to 36 MB of memory.

Type
Compact
Processor
68030 25 MHz (Macintosh LC III)
Memory
4 MB
Storage
80 MB – 160 MB
Screen
–
Weight
3.99 kg

Performance

Processor
68030 25 MHz (Macintosh LC III)
CPU cores
1
Memory
4 MB
Storage
80 MB to 160 MB
CPU
25 MHz Motorola 68030 with integrated memory-management unit, 32-bit data path and 0.5 KB L1 cache; optional 68882 floating-point coprocessor
GPU
Built-in video with 512 KB VRAM supports 8-bit colour at 640 × 480 and 832 × 624; upgrading to 768 KB raises both to 16-bit colour
Memory type
4 MB on the logic board and one 72-pin SIMM slot; Apple supports 4–36 MB total with 80 ns memory
Storage type
Internal 1.44 MB floppy drive and 80 or 160 MB internal SCSI hard drive
Expansion slots
One LC III processor-direct slot

Display

Screen
None built in

Design and power

Type
Compact
Weight
3.99 kg
Width × depth × height
310 × 389 × 74 mm
Operating system
macOS
Size and weight detail
Apple's 2.9 × 12.2 × 15.3 inch and 8.8 lb reference dimensions; metric fields are rounded conversions
Power supply
Maximum 50 W; 100–240 V AC, 47–63 Hz; 3.6 V lithium clock battery
In the box
Original System Software 7.1. Apple lists 10 February 1993 as introduction; a separate maker first-sale date was not established.

Connections

Back ports
Apple Desktop Bus, DB-15 video, DB-25 SCSI, printer and modem serial ports, microphone input and speaker output; no built-in Ethernet
External displays
Built-in video supports up to 832 × 624 pixels; colour depth depends on fitted VRAM
Speakers
Internal speaker

Configurations

ProcessorMemoryStorageStorage type
68030 25 MHz (Macintosh LC III)4 MB80 MBHard drive
68030 25 MHz (Macintosh LC III)4 MB160 MBHard drive

Pros and cons

Pros

  • 32-bit processor data path
  • Built-in colour video with expandable VRAM
  • Slim desktop case with an LC III expansion slot

Cons

  • No floating-point unit as standard
  • No built-in Ethernet
  • One memory expansion slot

Closest rivals

Model
TypeProcessorMemoryStorageScreenWeightReleased
CompactMotorola 68LC040 20 MHz (Macintosh Centris 610)4 MB80 MB––1993
CompactMotorola 68040 25 MHz (Macintosh Centris 650) or Motorola 68LC040 25 MHz (Macintosh Centris 650)4 MB–––1993
CompactMotorola 68040 25 MHz (Macintosh Centris 660AV)4 MB81.92 MB––1993

Sources

  1. support.apple.com/en-mide/112230
  2. commons.wikimedia.org/wiki/File:Macintosh_LC_III_front.jpg

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