Apple · PowerBook

Macintosh PowerBook Duo 280c

Released May 1994

The Duo 280c is a dockable 68LC040 notebook with an active-matrix colour display and 320 MB SCSI hard drive.

Specifications

Screen size: 8.4″
Resolution: 640 × 480
Touchscreen: No
Display type: 8.4-inch backlit active-matrix colour LCD; 256 colours at 640 × 480 or thousands of colours at 640 × 400

Processor: Motorola 68LC040 66 MHz (PowerBook 540c)
CPU cores: 1
Memory: 4 MB
Storage: 320 MB
CPU: Motorola 68LC040 with 66 MHz internal processor speed and 33 MHz bus interface; integrated memory management without an FPU
Memory type: 4 MB fitted, expandable to 8 or 12 MB with Apple's memory kits and up to 40 MB using third-party cards
Storage type: 320 MB internal SCSI hard drive; optional external 1.4 MB Apple SuperDrive through a floppy adapter or dock

Battery life (maker's claim): Up to 4 hours
Weight: 2.1 kg
Thickness: 38 mm
Width × depth: 277 × 216 mm
Battery life detail: Removable high-capacity Type III nickel-metal hydride battery; Apple claims 2–4 hours. Maker TIL gives 2.1 kg and 4.8 lb together; the stated metric weight is retained without converting the inconsistent pounds figure

Operating system: macOS
Port detail: 152-pin docking connector, RS-422 serial/LocalTalk, power input and optional internal 14,400 bps fax/data modem; ADB, SCSI, video and floppy connections available through compatible docks
External displays: Video output through an optional Duo Dock, Duo Dock II or Duo MiniDock
Trackpad: 19 mm trackball with two buttons
Speakers: Built-in mono speaker and omnidirectional microphone; 8-bit sound input at 11 or 22 kHz
In the box: Notebook with 4 MB RAM and 320 MB storage; desktop docking hardware and external floppy drive sold separately

Processor	Memory	Storage
Motorola 68LC040 66 MHz (PowerBook 540c)	4 MB	320 MB

Model	Size	Display	Processor	Memory	Weight	Battery	Released
AppleMacintosh PowerBook Duo 270c	8.4″	–	Motorola 68030 33 MHz	4 MB – 12 MB	2.1 kg	4 h	1993
AppleMacintosh PowerBook 100	9″	–	68000 16 MHz (PowerBook 100)	2 MB	2.3 kg	4 h	Oct 1991
AppleMacintosh PowerBook Duo 210	9″	–	Motorola 68030 25 MHz (PowerBook 145B)	4 MB	1.9 kg	4.5 h	Oct 1992