However, my AKF53 monitor doesn't like it so much and has trouble syncing to the video mode used by the RISC iX bootloader, which makes me very sad.
After a power-on holding down "T", the monitor now likes the resolution. And with a little tweak to /etc/rc.net (telling it to use ea0 rather than en0), it also recognised my Ether3 podule, so I now have a fully working RISC iX system. It evens runs twm and an xterm on a 4Mb A5000.
I've wanted one of these to play with ever since I was about 13 at the first Acorn User Show when Acorn were showing off the R260 and tried unsuccessfully to guess the root password on it while a mate kept the Acorn man talking. I can't remember if it was that Acorn User Show or another where we managed to swipe the newly released Level 4 fileserver software from them too. Raiding the Acorn stand was definitely always one of our objectives