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 ALSO
     intro(4), pcctwo(4), syscon(4)

OpenBSD 4.7                     January 5, 2008                              1
