Date: Tue, 4 Nov 1997 23:30:03 -0800 (PST) From: j@uriah.heep.sax.de (J Wunsch) To: freebsd-bugs Subject: Re: kern/4921: sio0/sio1 not found - probe test 5 and 8 failed Message-ID: <199711050730.XAA19914@hub.freebsd.org>
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The following reply was made to PR kern/4921; it has been noted by GNATS. From: j@uriah.heep.sax.de (J Wunsch) To: cjafe@tin.it Cc: freebsd-gnats-submit@FreeBSD.ORG Subject: Re: kern/4921: sio0/sio1 not found - probe test 5 and 8 failed Date: Wed, 5 Nov 1997 08:03:24 +0100 As cjafe@tin.it wrote: > >Description: > Totem motherboard TX1, bios 1.2N, Award Bios 4.51PG, chipset 430Tx, ALI 5135, AMD K6 166Mhz. > during boot i receive this message: > > sio0 not found > probe test 5 failed > sio1 not found > probe test 8 failed Odd. What are they using for the UART chip? Right now, only some (crappy) internal modems were known to be slow in responding in their interrupt logic. This was somewhat understandable, since these modems don't have real UARTs, but emulate the UART with an ASIC. But in your case, it seems to happen with the UART chip on the mother- board (which is supposed to be a real UART). Would increasing the 1 ms timeout right before tests 5 and 8 help? I still agree with Bruce though that 1 ms is fairly long in order to allow a chip to clear its interrupt request. Remember, 1 ms is a single character at the nowadays awfully slow speed of 9600 Bd. It means the UART doesn't clear the interrupt after about 100 other characters were flowing in at 115 kBaud... -- 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. ;-)
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