Apple upped the ante by moving from the 68030 to the 68LC040 processor on the Duo 280 and 280c in May 1994. (The 68LC040 is a low power version of the 68040 with the internal FPU disabled.) Other than the CPU, this is essentially a Duo 270c.

Like the 270c, the 280c supports 16-bit video if you select the 640 x 400 pixel mode under Options in the Monitors control panel.

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Details

• introduced 1994.05.16 at $3,750; discontinued 1996.01.27
• supports System 7.1 to Mac OS 8.1
• CPU: 33 MHz 68LC040
• RAM: 4 MB, expandable to 40 MB using a single Duo RAM card
• ROM: 1 MB
• display: 8.4″ 640 x 480 @ 8-bits, 640 x 400 @ 16-bits, 95 ppi active matrix
• ADB port: only with dock
• SCSI port: only with dock
• serial ports: 1 DIN-8 RS-422 port on back of computer
• proprietary modem slot
• Gestalt ID: 103
• Size (HxWxD): 1.5″ x 10.9″ x 8.5″
• Weight: 4.8 pounds
• power supply: M2693

Acceleration

• Chipping the PowerBook Duo

Online Resources

• See: Online resources and links for the PowerBook Duo 280c

Cautions

• Modem port limited to 57.6 kbps (printer port may be faster); use of a 56k modem on the modem port may limit throughput. See 56k modem page.

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