Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages


home | help
RP(4)			 BSD Kernel Interfaces Manual			 RP(4)

     rp	-- driver for Comtrol RocketPort Intelligent Serial Port Cards

     device rp

     For ISA cards, you	must specify the port address in /boot/device.hints:"isa"

     This driver provides a kernel device driver for the RocketPort and
     RocketPort	RA serial boards.  These boards	provide	8, 16, or 32 high-
     speed serial ports	while requiring	only 68	bytes of I/O space for all 8,
     16, or 32 ports, and do not require an interrupt channel.	This driver
     supports up to four RocketPort or RocketPort RA boards in one machine si-
     multaneously.  If you are using four 32 port RocketPort boards, you can
     put as many as 128	intelligent serial ports on your system.

     The rp driver supports the	following speeds: 50, 75, 110, 134, 150, 200,
     300, 600, 1200, 1800, 2400, 4800, 9600, 19200, 38400, 7200, 14400,	57600,
     76800, 115200, and	230400.	 (You must use termios(4), rather than the old
     style ioctl interface to use non-traditional speeds.)

     An	open on	the rp driver will block until carrier is present, unless
     O_NONBLOCK	or CLOCAL is set.

     The first RocketPort or RocketPort	RA card	requires a 68-byte contiguous
     block of I/O addresses, starting at one of	the following: 0x100h, 0x140h,
     0x180h, 0x200h, 0x240h, 0x280h, 0x300h, 0x340h, 0x380h.  The second,
     third, and	fourth RocketPort cards	require	only a 64-byte contiguous
     block of I/O addresses, starting at one of	the above address ranges.  The
     I/O address range used by any of the RocketPort cards must	not conflict
     with any other cards in the system, including other RocketPort cards.
     The starting range	of the I/O ports used by each card must	match with the
     I/O address specified in /boot/device.hints.

     Since the first RocketPort	uses 68	I/O addresses, if the first card is
     set to use	an I/O block starting at 0x100,	it will	occupy the I/O ports
     between 0x100 and 0x143.  This means that the second, third, or fourth
     RocketPort	board may not use the block of addresses starting at 0x140,
     since the first three I/O addresses of that range are used	by the first
     board.  This is an	important point	to keep	in mind.

     If	you have two ISA cards,	one installed at 0x100 and the second in-
     stalled at	0x180, then you	should add the following to

     The configuration of the RocketPort cards is done via the set of 8	DIP
     switches, labeled SW1 on the RocketPort card:

	   | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
	   | Unused| Card  | I/O Port Block|

     DIP switches 7 and	8 are unused, and must be left on.

     DIP switches 6 and	5 identify the card number of each RocketPort card.
     The first card installed in the system must have its DIP switches set as
     card number one; the second card installed	in the system must have	its
     DIP switches set as card number two; and so on.  As shipped from the fac-
     tory, DIP switches	6 and 5	are both on by default,	indicating that	this
     is	the first card installed on the	system:

	   DIP Switches
	   6	5
	   On	On   First Card
	   On	Off  Second Card
	   Off	On   Third Card
	   Off	Off  Fourth Card

     DIP switches 4, 3,	2, and 1 indicate the I/O address range	used by	the
     first RocketPort card.  If	there are more than one	RocketPort cards in-
     stalled in	a system, the second, third and	fourth RocketPort cards	must
     also be set to the	I/O address range used by the first RocketPort card;
     all cards must have these DIP switches set	identically for	proper opera-
     tion.  As shipped from the	factory, DIP switch 4 is on, and switches 3,
     2,	and 1 are off by default, indicating an	I/O address range used by the
     first card	which starts at	0x180 and extends to 0x1C3.

	   DIP Switches		I/O Address Range
	   4	3    2	  1	Used by	the First Card
	   On	Off  On	  Off	100-143
	   On	Off  Off  On	140-183
	   On	Off  Off  Off	180-1C3
	   Off	On   On	  Off	200-243
	   Off	On   Off  On	240-283
	   Off	On   Off  Off	280-2C3
	   Off	Off  On	  Off	300-343
	   Off	Off  Off  On	340-383
	   Off	Off  Off  Off	380-3C3


     Theodore Ts'o <>

     This driver was written under contract for	Comtrol	Corporation.  For
     dealer, distributor and other information regarding Comtrol RocketPort,
     contact Comtrol Corporation at (800) 926-6876 or send email to
     <>.  To report bugs for this driver, please send email to

     If	incoming software flow control is enabled on a 486 or Pentium machine,
     and the flow control is very heavily exercised, on	rare occasions a char-
     acter will	get dropped.  This problem does	not occur on a 386, and	it is
     not currently known whether the bug is in the rp driver or	in the BSD/OS
     tty layer.

BSD			       November	15, 1995			   BSD


Want to link to this manual page? Use this URL:

home | help