Part 8 - Switches
The Macintosh IIcx and IIci models only had three switches: power switch (rear panel), programmer's switch (non-maskable interrupt), and reset switch. In addition to these, I wanted an eject button for the SuperDisk and also for the CD-RW.

The NMI and reset switches were soldered directly to the motherboard on the Macintosh IIcx and IIci. A single plastic assembly protruded from the front of the case and bridged the distance to these switches. In the Yosemite Macintosh, the NMI and reset switch (as well as the power switch) are located on a separate (front panel) logic board connected to the motherboard with a ribbon cable. There was no room vertically to duplicate the original physical connection. And I had chosen to attach the front panel logic board to the underside of the hard drive tray. So, I modified the plastic bridge assembly to allow fitment of SPST momentary contact switches. Then, for ruggedness, this assembly was attached using a single screw through the case bottom. The Yosemite front panel logic board was also modified by soldering headers in the appropriate places to accept wiring from the switches in the plastic bridge assembly.

I drilled two holes in the front panel of the case to accept the SPST momentary contact switches used for the eject buttons. These would simply be threaded into the mounting nuts that came with them. The mounting nuts were secured to the inside of the case using cyanoacrylate adhesive. While I was at it, I filled the original floppy eject hole with several applications of cyanoacrylate adhesive. This effectively eliminated the hole. I added a little extra so that after curing, I could sand everything smooth for painting.

	Front panel switches. Note the original speaker bracket welded in place with plastic solvent and the light pipe for the Apple logo badge.

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