10-08-2008
Hi,
When you say HP-UX can't find the devices, what is the message you're seeing? Is it something along the lines of "No such device address"?
-goon12
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RTFPS(4) BSD Kernel Interfaces Manual RTFPS(4)
NAME
rtfps -- multiplexing serial communications interface
SYNOPSIS
rtfps0 at isa? port 0x1230 irq 10
com2 at rtfps0 slave 0
com3 at rtfps0 slave 1
com4 at rtfps0 slave 2
com5 at rtfps0 slave 3
DESCRIPTION
The rtfps driver provides support for IBM RT PC boards that multiplex together up to four EIA RS-232C (CCITT V.28) or RS-422A communications
interfaces.
Each rtfps device is the master device for up to four com devices. The kernel configuration specifies these com devices as slave devices of
the rtfps device, as shown in the synopsis. The port specification for the rtfps device is used to compute the base addresses for the com
subdevices.
FILES
/dev/tty0?
SEE ALSO
com(4)
HISTORY
The rtfps driver was written by Charles Hannum, based on the ast driver.
BUGS
The rtfps driver is unlikely to work on non-EISA and non-PCI machines. The ISA bus only asserts 10 I/O address lines, and this is not
enough.
Even on EISA and PCI machines, some address conflicts have been observed. On one machine, the second port always conflicted with something
(though it's not clear what) and caused strange results. Disabling the second port in the kernel config allowed the other three ports to
function correctly.
BSD
August 7, 1994 BSD