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From: lcaldwell@acs.utah.edu (Lloyd Caldwell)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: sio and pci mother boards with builtin 16550s won't boot
Date: 4 Mar 1996 19:25:19 GMT
Organization: Univ. of Utah, Admin. Comp. Serv.
Lines: 56
Message-ID: <4hfg2v$85s@news.cc.utah.edu>
NNTP-Posting-Host: sleet.acs.utah.edu
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Problems with 16650 serial ports and SIO???
1) one system with everything integrated on the mother board won't
boot if either serial port is enabled.
PN-3000 everex PCI/EISA mother board, 90 Mhz cpu, 32 meg memory,
aha2940 hba, 2 - 1gig micropolis scsi disks,
1 toshiba 3401 scsi cdrom, ati mach64 PCI video with 2meg memory,
3c509 (in eisa mode). triton chip set.
the mother board has:
com1, com2, lpt1, eide (disabled in bios), floppy and
a ps2 mouse port built in.
Have tried boot config to disable fifo on sio0 and sio1.
device sio0 flag 0x0002
device sio1 flag 0x0002
but still stops during probe.
Would be nice to have a mouse for running X, the PS/2 port
isn't an option as I have no motherboard to case plug-cable.
the behaviour is:
select BSD from boot prompt.
kernel loads (spinning slash-dash marks)
video screen goes off (rather violently), no disk activity.
power off is only recourse.
if the com ports (16550A) are disabled using BIOS
or sio0,sio1 are disabled with boot
config the system boots just fine.
2) another system with PCI/ISA paddle board
multi-io setup: com1, com2, lpt1, floppy and eide,
when running X, gets HUNDREDs of
sio0: 23874 interrupt-level buffer overflow.
^
| this number is a variable, going from large to small
console messages. The mouse is very erratic also.
I speed up the port speed and the mouse was a little
better but still basically unusable.
Any suggestions, driver mods, new configuration settings?
Are most people using multi-port cards or older ISA
com port adapters?
thanks
Lloyd M Caldwell
801-585-3131
lcaldwell@acs.utah.edu
150 Park building
Salt Lake City, Ut 84112
fax: 801-581-5877