I'm just in the process of trying to build one for my Central. I've decided to give the RAM upgrade a go, and it looks like I will need to flash a modified boot prom onto the unit to get it to recognise the extra RAM. From what I understand, you need serial port access to do this.

Hugo is on holiday at the moment, but I'm hoping that he will be able to provide a little bit more information on what needs to change in order to get this working when he gets back. I'm also trying to figure out what value capacitors I need to use for decoupling on the extra ram. There are empty pads for them, so I'm guessing I ought to fit them.

Andy.