The clockport expander my Matthias Münch for the Amiga is designed to fit over the clockport port but this will not work if the Amiga is expanded with a Mediator board since the Mediator fits on top of the clockport port.

This guide shows the rework of a clockport expander such that it can be used together with the Mediator in a desktop PC case.

The clockport expander has a 22 pin female IDC header fitted on the bottom side of the board. The header has to be desoldered either using a hot gun or some ChipQuik. Then, a male 22 pin header is soldered onto the top part of the clockport expander. Nothing changes in pin assignments and a standard direct clockport cable can be used to connect the clockport expander to the IDC header on the Amiga motherboard.

Furthermore, the connector that saps the A14 and A15 signals from either the Amiga kickstart ROMs or Gayle is replaced with a more sturdy header onto the board. This is done by bending the pins on the white case of the header and then soldering the result onto the pins of the clockport expander.

The final result is a male header on top of the board and two leads that can then be connected to the Amiga motherboard.

The A14 and A15 signals can be obtained from either the kickstart chips (either one of them) by connecting the red lead to pin 35 (signal A14) and the black lead to pin 34 (signal A15).

The A14 and A15 signals can be sapped from Gayle for the clockport expander. If additionally you have a FastATA board mounted on top of Gayle, then the leads can be soldered directly on the cap that goes over Gayle.

The very first versions of the clockport expander benefited from two mounting holes that can be used with motherboard fixing screws to ensure that the board does not move inside the case. The clockport expander fits nicely, mounted vertically on the same metal plate that holds the motherboard in a PC case.