Macintosh Classic II FPU card
author: Tobrew
2 layer board of 2.70 x 2.56 inches (68.6 x 65.0 mm)
Uploaded:
May 29, 2026
Shared:
May 29, 2026
Total Price:
$34.55
Expansion card that adds an MC68882 FPU to your Macintosh Classic II. The board has two layers to keep the PCB cost down. It offers a switchable clock source between the system clock (16 MHz, synchronous operation) and a crystal oscillator on the board (40 MHz, asynchronous operation; tested with MC68882FN40A, 50 MHz might also work).
Project by Marcin Dymczyk
Expansion card that adds an MC68882 FPU to your Macintosh Classic II. The board has two layers to keep the PCB cost down. It offers a switchable clock source between the system clock (16 MHz, synchronous operation) and a crystal oscillator on the board (40 MHz, asynchronous operation; tested with MC68882FN40A, 50 MHz might also work).
Project by Marcin Dymczyk
