BMD(4) Device Drivers Manual (x68k) BMD(4)

bmd
Nereid bank memory disk driver

bmd* at intio0 addr 0xece3f0
bmd* at intio0 addr 0xecebf0

The bmd driver provides a memory disk for the Nereid bank memory space. There is no special command to configure it, because bmd is not a logical disk as md(4).

/dev/bmd??
block mode bank memory disk
/dev/rbmd??
raw mode bank memory disk

In order to use it, do as follows:
newfs /dev/bmd0c
mount /dev/bmd0c /mnt

x68k/intio(4)

bmd appeared in NetBSD 2.0.
February 17, 2017 NetBSD 9.4