MCBUS(4) Device Drivers Manual (alpha) MCBUS(4)

mcbus, mcmemMCBUS system bus

mcbus* at mainbus0
mcmem* at mcbus? mid ?

The mcbus driver provides support for the MCBUS system bus found on AlphaServer 4100 and 1200 systems.

The following devices are supported by the mcbus driver:

memory modules attached to the MCBUS main system bus.
MCPCIA MCBUS-to-PCI bus adapter

intro(4), mainbus(4), mcpcia(4)

Only one MCBUS bus can exist within the system.

November 21, 2015 OpenBSD 7.5