The PowerBook Duo 2300c was Apple’s only PowerBook Duo based on a PowerPC CPU. To make the 2300c compatible with Duo Docks for earlier models, the 100 MHz 64-bit PowerPC 603e CPU was used on a 33 MHz 32-bit bus, which seriously compromised performance.

The 9.5″ 640 x 480 display normally runs in 8-bit/256-color mode, but by switching to 640 x 400 resolution it support 16-bit color.

According to the Road Warrior and Other World Computing , the drive controller in pre-G4 PowerBooks is incompatible with ATA-6/Ultra ATA-100 hard drives.

Specs (via Low End Mac)

• Cpu: 100 MHz PPC 603e
• Performance: unknown
• Ram: 8 or 20 MB, expandable to 56 MB
• Rom: 2 MB
• Hard Drive: 750 MB or 1.1 GB
• Display: 640 x 480 9.5″ 85 ppi active matrix with 8-bit color (16-bit color at 640 x 400)
• Gestalt Id: 118
• Code Name: AJ
• Serial: 1 DIN-8 RS-422 port on back of computer
• Weight: 4.8 pounds
• Adb Port: only with dock
• Scsi Port: HDI30 connector on dock
• Power Supply: M4174
• See: Online resources and links for the PowerBook Duo 2300c