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Man Pages


Manual Reference Pages  -  RC (4)

NAME

rc - RISCom/8 multiport card

CONTENTS

Synopsis
Description
Hardware
Diagnostics
See Also
History
Authors
Bugs

SYNOPSIS


.Cd device isa
.Cd device rc

DESCRIPTION

The RISCom/8 is an eight port ISA RS-232C communications multiplexer with a built in RISC processor. It uses a block of sixteen 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 /boot/device.hints file.

This driver is mostly based on the Cirrus Logic CL-CD180 driver.

HARDWARE

The rc driver provides support for the SDL Communications RISCom/8 boards.

DIAGNOSTICS

The following driver specific error messages may be reported:
rc%d channel%d: interrupt-level buffer overflow An internal buffer overflow error has occurred on the listed channel. The rc driver will need to be reloaded to correct this.
rc%d: Bad char chan %d The channel has obtained a bad set of characters.
rc%d: Got extra chars chan %d The rc driver got more characters than expected on the channel shown.
rc%d: data mismatch chan %d ptr %d (%d != %d) Data sent from channel %d to the rx buffer was different then expected.
rc%d: channel %d command timeout, rc.c line: %d A command timeout has occurred on the channel, the src/sys/dev/rc/rc.c file can be consulted for more information.

SEE ALSO

tty(1), ttyname(3), sio(4), tty(4), device.hints(5), comcontrol(8), getty(8), mutex(9), splx(9)

http://www.sdlcomm.com

HISTORY

The rc driver first appeared in
.Fx 2.0.5 . This manual page first appeared in
.Fx 5.3 .

AUTHORS

This manual page was written by
.An Tom Rhodes Aq trhodes@FreeBSD.org .

BUGS

The rc driver code still uses the spl(9) functions. These should be replaced by mutex(9) functions.

The various ttyld_* functions should be documented.

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