BUSSW(4) OpenBSD Programmer's Manual (MVME88k) BUSSW(4)NAME
bussw - BusSwitch local peripheral bus interface
SYNOPSIS
bussw0 at mainbus0 addr 0xfff00000
DESCRIPTION
The bussw BusSwitch ASIC provides an interface from the MVME197's 64-bit
wide system bus to the MC68040 compatible 32-bit wide local bus, to which
the system's I/O devices, e.g. SCSI and Ethernet, are attached.
It includes the following features:
o Bus arbitration for the MC88110 bus
o Seven level interrupt handler
o Programmable map decoders
o Write post buffers
o Two tick timers
o Four 32-bit general purpose registers
SEE ALSOintro(4), pcctwo(4), syscon(4)OpenBSD 4.9 January 5, 2008 OpenBSD 4.9