The EVO1-3 ECU is designed to pass only 32KB of EPROM space to the processor. ECMLink includes enough code modifications that more space is needed than that. Luckily, the Mitsubishi ECU engineers were kind enough to provide a simple jumper modification to allow for this.

To enable the full 64KB of EPROM space on an EVO1-3 ECU, you simply have to move a jumper from one spot to another. Unfortunately, this jumper is soldered to the board. So it's not quite as simple as the “typical” jumper move you may be familiar with on PCs and such, but it's not hard either.

The image below illustrates the location of this jumper and what change you need to make.