1.\" Copyright (c) 1987, 1991 The Regents of the University of California. 2.\" All rights reserved. 3.\" 4.\" This code is derived from software contributed to Berkeley by 5.\" Computer Consoles Inc. 6.\" 7.\" %sccs.include.redist.roff% 8.\" 9.\" @(#)mpcc.4 6.6 (Berkeley) 05/10/91 10.\" 11.Dd 12.Dt MPCC 4 13.Os 14.Sh NAME 15.Nm mpcc 16.Nd multi protocol communications controller 17.Sh SYNOPSIS 18.Cd "device mp0 at vba? csr 0xffff5000 mpintr mpdlintr" 19.br 20 thru 21.Cd "device mp15 at vba? csr 0xffff5f00 mpintr mpdlintr" 22.Sh DESCRIPTION 23The 24.Tn MPCC 25has two different connecter panel styles. 26The 16 port 27.Tn MPCC 28will support any combination of 29.Tn SYNC 30or 31.Tn ASYNC 32ports. 33The 32 port 34.Tn MPCC 35will only support 36.Tn ASYNC 37ports. 38Each async line attached to the 39.Tn MPCC 40communications controller 41behaves as described in 42.Xr tty 7 43and may be set to run at any of 16 speeds; see 44.Xr tty 45for the encoding. 46.Pp 47Each 48.Tn MPCC 49controller uses two consecutive entries in the 50.Tn SCB 51for 52download/handshake, and command/response interrupts. These entries 53start at 0xa0 for the 1st controllers download/handshake interrupts 54and 0xa1 for the 1st controllers command/response. 55.Pp 56The 57.Tn MPCC 58controller requires a firmware download to be completed 59before it can function. See 60.Xr dlmpcc 8 61and 62.Xr mpcctab 4 63for specific information on how to configure and download the 64firmware into the 65.Tn MPCC 66controller. 67.Pp 68A maximum of 16 69.Tn MPCC 70communication controllers can be supported. 71.Sh FILES 72.Bl -tag -width /dev/tty[A-P][0-f,g-v] -compact 73.It Pa /dev/tty[A-P][0-f] 74for 16 port 75.Tn MPCC 76.It Pa /dev/tty[A-P][0-f,g-v] 77for 32 port 78.Tn MPCC 79.El 80.Sh SEE ALSO 81.Xr tty 7 82.Sh HISTORY 83The 84.Nm mpcc 85driver appeared in 86.Bx 4.3 tahoe . 87.Sh BUGS 88As of the 89.Bx 4.3 tahoe 90release, only 16 port 91.Nm mpcc Ns 's 92work, and then 93only in async mode. Attempting to reload firmware on an 94.Nm mpcc 95with 96active ports may crash the system. This should be fixed within 97a short period of time; contact the 98.Tn CSRG 99at University of California, 100Berkeley, for upgrade information. 101