For further nostalgia - I meant to attach this picture of the config screen to my last post (Accessed by select-reset), guess i forgot to click something!
I've seen something about newer firmware, but maybe only for the later recreated MIO's.
The print buffer was a nice thing too, configurable memory allocation.
I would configure the ram disk to 900KB or something, and then ran a utility for the BBS called MIOCACHE - and it would use any unallocated MIO RAM for a disk cache... it tremendously sped up repetitive directory access, like scanning message bases, command folders, and file areas. the MIO RAMdisk was even faster than any internal ramdisk (less memory copying between banks) so a lot of the time i never even used the internal RAMdisk for the BBS even with 320K.
I had the MIO for about a year before I even got a hard drive, and it was great that the RAMdisk would keep its contents as long as it was left on, even when the computer got turned off. Being able to reassign floppy drives to other drive numbers in software was nice too. my standard setup had my floppy D1: reassigned to D4: by the MIO. (So I could boot D1: from the HD)