DesTest MAX-Switch bare PCB

A circuit board that enables you to build a DesTest MAX-Switch cartridge for your C64 or C128. Please visit the DesTest MAX-Switch page at the Factor Of Matt website for more details about the DesTest MAX-Switch and to download the required firmware.

Please note: This is just the PCB, not a full-kit.

DesTest MAX-Switch features

The custom DesTestSwitch cartridge adds the capability to switch (hence the name) between the MAX-mode and regular cartridge-mode under program control. The new DesTest Software allows the following features:

• Full 64K memory test using the March-B algorithm.
• No dependence on the ROMs, CIAs or SID: they can be removed.
• ROM checksum verification (if installed).
• CIA TOD consistency verification.

The DesTest MAX-Switch hardware also includes provisions for the following:

• Power LED. Most of the time when diagnosing or repairing a C64, the keyboard is removed along with the Power LED. The DesTest MAX-Switch cartridge includes a simple power LED to avoid mistakes like removing or inserting ICs with the power on.
• Reset Switch and LED. A faulty reset-circuit in a C64 can prevent it starting-up properly. A reset-switch can temporarily bypass a faulty reset-circuit and the LED gives a visual indication if something is wrong!