I originally thought that it was just a hardware thing - solder on another chip, job done. After all, the pads were on the board, so why wouldn't #Psion have made #EPOC16 work with 4MB RAM?

But maybe a 4MB 3mx just wasn't a priority for Psion any more. #EPOC32 and the Series 5 were in full swing by the time the 3mx was released. The two Psions were drifting apart, too - Psion's hardware business ended up refocusing on Windows CE machines.

Psion had the ramdrive working with 2MB machines since the 3a2. The code probably hadn't been touched in ages, and it might have been too much hassle to update for the returns they thought they might get.

This is all speculation, of course. But it would make sense.

@jbmorley FrotzS5 -- a z-machine interpreter for text-adventures / interactive fiction. The keyboard is excellent and there's many hundreds of games available and still being produced yearly