IBUS(4) | Device Drivers Manual (pmax) | IBUS(4) |
ibus
—
ibus0 at mainbus0
ibus0 at tc? slot ? offset ?
ibus
is a virtual device corresponding to the pmax
internal I/O space found on DEC 2100, 3100, 5100 and 5000/200 systems.
Internal I/O space spans the pmax physical address space, and is mapped permanently in the kernel virtual space at the very early time of the kernel startup procedure.
ibus
driver manages the internal I/O space
of pmax.
ibus
is always required to run the
NetBSD kernel.
February 17, 2017 | NetBSD 9.4 |