PCCTWO(4)

NAME
pcctwo - PCCchip2 local bus controller

SYNOPSIS
pcctwo0 at mainbus0 addr 0xfff00000 (MVME187)
pcctwo0 at bussw0 offset 0x00000 (MVME197)
nvram0 at pcctwo0 offset 0xc0000
vme0 at pcctwo0 offset 0x40000
ie0 at pcctwo0 offset 0x46000 ipl 3
osiop0 at pcctwo0 offset 0x47000 ipl 2
cl0 at pcctwo0 offset 0x45000 ipl 3
cl1 at pcctwo0 offset 0x45200 ipl 3 (M8120 only)
memc0 at pcctwo0 offset 0x43000
memc1 at pcctwo0 offset 0x43100

DESCRIPTION
The pcctwo PCCchip2 ASIC provides an interface to the different local bus-attached I/O devices as found on some of the MVME88k Single-Board Computers. On MVME187 boards it is attached directly to the processor bus, while on MVME197 boards it attaches to the bussw(4) BusSwitch ASIC.

Features Summary:

•   8-bit parallel I/O port
•   Master/slave interface for cl(4) Cirrus Logic CD2401 serial controller
•   Host interface to ie(4) Intel i82596CA LAN coprocessor
•   Host interface to nvram(4) Mostek MK48T0x battery-backed realtime clock osiop(4) Symbios/NCR 53C710 SCSI controller
•   Interface to the memc(4) Memory controller ASIC

SEE ALSO
bussw(4), cl(4), ie(4), intro(4), memc(4), nvram(4), osiop(4)