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 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 FreeBSD 2.0.5. This manual page first appeared in FreeBSD 5.3.
AUTHORS
This manual page was written by Tom Rhodes ⟨[email protected]⟩.
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.