rc(4)
NAME
rc - RISCom/8 multiport card
SYNOPSIS
device isa 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 report
- ed:
- rc%d channel%d: interrupt-level buffer overflow An internal
- buffer overflow error has occurred on the listed channel. The rc driv
- er 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 char
- acters 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), comcon
- trol(8),
getty(8), mutex(9), splx(9) - http://www.sdlcomm.com
HISTORY
- The rc driver first appeared in FreeBSD 2.0.5. This manual
- page first
appeared in FreeBSD 5.3.
AUTHORS
- This manual page was written by Tom Rhodes <trhodes@FreeB
- SD.org>.