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From: j@uriah.heep.sax.de (J Wunsch)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: Speed Problems with shared irq multiport card
Date: 14 Jul 1996 09:15:47 GMT
Organization: Private BSD site, Dresden
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References: <4s9n37$b0r@clams.camtech.com.au>
Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch)
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matt@mtc.bns.com.au (Matt Colliver) wrote:
> My questions are these.
> Is the "vector siointr" on each line causing me problems,and if so or
> otherwise, can I configure the kernel (through booting and kernel -c)
> any better?
SIO(4) FreeBSD Programmer's Manual SIO(4)
NAME
sio - fast interrupt driven asynchronous serial communications interface
...
For AST compatible multiport cards with 4 ports:
options "COM_MULTIPORT"
device sio4 at isa? port 0x2a0 tty flags 0x701
device sio5 at isa? port 0x2a8 tty flags 0x701
device sio6 at isa? port 0x2b0 tty flags 0x701
device sio7 at isa? port 0x2b8 tty flags 0x701 irq 12 vector siointr
For Boca Board compatible multiport cards with 8 ports:
options "COM_MULTIPORT"
device sio4 at isa? port 0x100 tty flags 0xb05
...
device sio11 at isa? port 0x138 tty flags 0xb05 irq 12 vector siointr
So yes, you should wire the interrupt vector *only* to the master
device. I don't think this can be corrected by booting with -c, you
need to reconfigure and rebuild the kernel. (You don't need to throw
away all your object files however, if this is any help to you. If
your only change to the config file is removing the interrupt vectors,
it is entirely safe to run ``config -n''.)
--
cheers, J"org
joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)