Neil from Retro4u returns with a detailed build of the DesTest MAX-Switch, a powerful diagnostic cartridge for the Commodore 64. The DesTest MAX-Switch upgrades the original DesTest MAX, adding full 64K memory testing, ROM checksum verification, and advanced system diagnostics. From start to finish, Neil shows every step, making the process both fun and informative.
Before starting, Neil shares a special surprise, a package from Australia sent by a viewer. Then, he begins assembling the DesTest MAX-Switch using a bright yellow PCB from PCBWay. He installs resistors, capacitors, LEDs, sockets, and the ROM chip, explaining each part’s purpose. His soldering tips and build guidance make it easy for anyone to follow.
Next, Neil demonstrates how simple through-hole components can form a reliable diagnostic tool. Once assembled, he programs the ROM using the XG ECU programmer. The software loads quickly, and Neil shows how to burn the image to the chip with ease. After inserting the completed cartridge into his Commodore 64, he powers it on and launches the diagnostic menu.
The results show all green checks, confirming a successful build. The DesTest MAX-Switch runs full memory scans and checks system integrity, making it perfect for finding hardware faults. Neil points out that it even runs with minimal chips installed. Although he wishes it had an audio test, he’s very pleased with its accuracy and features.
Finally, the video closes with Neil opening his surprise package. Inside is a TerribleFire TF1230 accelerator board for his Amiga 1200, sent by a generous fan. His excitement is genuine, reminding viewers how supportive the retro computing community can be.
This project video blends clear instruction with genuine enthusiasm. It’s ideal for anyone who enjoys repairing or improving vintage systems like the Commodore 64.
