Someone asked us to explain what was involved in the non-EPROM conversion process and I thought it was a good question we hadn't covered before. This page outlines the basic process.

The following picture shows an original non-EPROM board, ready for modification (click to enlarge).

The first step is to carefully remove the CPU and make a few other modifications to the ECU's PCB to prepare it for our conversion. The following picture shows a board after this step is complete (click to enlarge).

After the CPU is removed, we have to install an adapter plug in its place. The following picture shows a board after this step is complete (click to enlarge). Note the careful solder work involved on those pins.

The final step is to snap our specially designed conversion board into place. The following picture shows the finished result (click to enlarge).