Duo MiniDock

The PowerBook Duo MiniDock (originally released as Macintosh Duo MiniDock) is a portable docking station that was developed by Apple Computer with SuperMac Technology and released on October 19, 1992, along with the PowerBook Duo 210 and 230.

Features
Like the full-sized Duo Docks, the MiniDock interfaced with a PowerBook Duo notebook through a custom 152-pin docking connector. However, instead of a motor, a lever was used to secure and release the devices. All the ports, drives, and expansion slots of the dock would become accessible by the PowerBook Duo as a NuBus device. It contained 512KB of video RAM that could support up to 8-bit color on a 832 x 624 external display, while the built-in LCD was operating simultaneously.

Variants
The MiniDock was manufactured for Apple by SuperMac Technology, which also released its own version, the EtherDock under its E-Machines brand.

Issues
With repeated use of excessive force, the plastic ejection lever is known to be prone to breakage. A PowerBook Duo that is connected to a MiniDock cannot sleep while an external monitor or SCSI device is attached.

Supported models
The MiniDock can physically fit with and support every released model of the PowerBook Duo line.
 * PowerBook Duo 210 (25 MHz 68030)
 * PowerBook Duo 230 (33 MHz 68030)
 * PowerBook Duo 250 (33 MHz 68030)
 * PowerBook Duo 270c (33 MHz 68030)
 * PowerBook Duo 280 (66/33 MHz 68LC040)
 * PowerBook Duo 280c (66/33 MHz 68LC040)
 * PowerBook Duo 2300c (100 MHz PowerPC 601)