PowerBook Duo 230

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.

PowerBook Duo 230Because 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.


  • introduced 1992.10.22 at $2,610; discontinued 1994.07.18
  • supports System 7.1 to Mac OS 8.1
  • 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
  • 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: 32
  • Size (HxWxD): 1.4″ x 10.9″ x 8.5″
  • Weight: 4.2 pounds
  • upgrade path: Duo 280
  • power supply: M7783


Online Resources


  • Apple Computer will consider this computer obsolete as of July 16, 2001 in the United States and July 23, 2001 in Canada. As of that date, service parts and documentation will no longer be available from Apple.
  • 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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