Macintosh Classic II FPU / ROM board

Design by Joshua Ryan (360alaska@gmail.com)

Parts list

All capacitors are 0.1µF non-polarized. Ceramic or tantalum, your choice.

The FPU socket is a 68-pin PLCC, Mouser #517-8468-11B1-RK-TP or similar.

The board connector is a TE Connectivity 2x25-pin DIP, Mouser #571-5-532955-8 or similar.

The oscillator is a 40MHz standard oscillator, Mouser #520-2200B-400 or similar.

Circuit board fabrication details

v4.9 is a four-layer board.

The .pcb file is a DesignSpark board file.

The .zip file contains the Gerbers for PCB fabriation. These work as-is with PCBway.