Remove the six screws from the bottom of the CoCo3 case.
Remove the four RAM chips IC16, IC17, IC18, and IC19.
Cut or clip out capacitors C65 can C66. Capacitor C65 is located at the bottom of the RAM area next to IC17. Capacitor C66 is located at the top of the RAM area at IC18.
Install Boomerang 512K Classic board along the connectors at the RAM area.
Testing the Classic 512K Memory Board
Any 512K memory board test should work, however, we recommend CoCo3 RAM Stress disk. The source can be found here:
Email [email protected] if you like a working compiled copy.