early Apple laptop

Along with the 25 MHz PowerBook Duo 210 , the Duo 230 was the first dockable Mac. By eliminating the internal floppy drive (as with PowerBook 100 ) along with other size and weight saving measures, Apple got this one down to 4.2 pounds.

Because of its design, there is no way to use a floppy drive, SCSI device, external display, or network without adding a DuoDock of some sort.

The Duo sports a 4-bit passive-matrix screen similar to the 6.8 lb. PowerBook 160 .

Specs (via Low End Mac)

• Cpu: 33 MHz 68030
• Fpu: optional 68882 in dock
• Performance: 4.6, relative to SE; 0.58, Speedometer 4
• Ram: 4 MB, expandable to 24 MB using a single Duo RAM card
• Rom: 1 MB
• Display: 640 x 400 84 ppi 4-bit passive matrix
• Gestalt Id: 32
• Upgrade Path: Duo 280
• Weight: 4.2 pounds
• Adb Port: only with dock
• Scsi Port: only with dock
• Serial Ports: 1 DIN-8 RS-422 port on back of computer
• Power Supply: M7783
• See: Online resources and links for the PowerBook Duo 230