Copyright (c) 2004 Tom Rhodes
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$FreeBSD: releng/10.2/share/man/man4/rc.4 143781 2005-03-18 02:38:03Z brueffer $
.Dd March 18, 2005 .Dt RC 4 .Os .Sh NAME .Nm rc .Nd RISCom/8 multiport card .Sh SYNOPSIS .Cd device isa .Cd device rc .Sh DESCRIPTION The .Tn RISCom/8 is an eight port .Tn ISA .Tn RS-232C communications multiplexer with a built in .Tn RISC processor. It uses a block of sixteen .Tn I/O ports in the range 0x200 to 0x3f0 selectable by on-board switches or jumpers. The block must be aligned on a sixteen port boundary. The jumper-selectable hardware interrupt level may be set to be detected during system initialization using settings found in the
a /boot/device.hints file.
p This driver is mostly based on the Cirrus Logic CL-CD180 driver. .Sh HARDWARE The .Nm driver provides support for the .Tn SDL Communications .Tn RISCom/8 boards. .Sh DIAGNOSTICS The following driver specific error messages may be reported: l -diag t "rc%d channel%d: interrupt-level buffer overflow" An internal buffer overflow error has occurred on the listed channel. The .Nm driver will need to be reloaded to correct this. t "rc%d: Bad char chan %d" The channel has obtained a bad set of characters. t "rc%d: Got extra chars chan %d" The .Nm driver got more characters than expected on the channel shown. t "rc%d: data mismatch chan %d ptr %d (%d != %d)" Data sent from channel .Ar %d to the rx buffer was different then expected. t "rc%d: channel %d command timeout, rc.c line: %d" A command timeout has occurred on the channel, the
a src/sys/dev/rc/rc.c file can be consulted for more information. .El .Sh SEE ALSO .Xr tty 1 , .Xr ttyname 3 , .Xr sio 4 , .Xr tty 4 , .Xr device.hints 5 , .Xr comcontrol 8 , .Xr getty 8 , .Xr mutex 9 , .Xr splx 9
p
a http://www.sdlcomm.com .Sh HISTORY The .Nm driver first appeared in .Fx 2.0.5 . This manual page first appeared in .Fx 5.3 . .Sh AUTHORS This manual page was written by .An Tom Rhodes Aq trhodes@FreeBSD.org . .Sh BUGS The .Nm driver code still uses the .Xr spl 9 functions. These should be replaced by .Xr mutex 9 functions.
p The various .Fn ttyld_* functions should be documented.