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Date:      Wed, 19 Apr 2000 19:23:01 -0700 (PDT)
From:      Bill Richter <wlr@table.jps.net>
To:        questions@freebsd.org
Subject:   sio2 inop after 3.4R -> 4.0R upgrade
Message-ID:  <Pine.BSI.4.05L.10004191909130.766-100000@table.jps.net>

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I've a happy FreeBSD 3.4-STABLE system, using sio2.
An internal modem, located on an ISA slot, found by the kernel
sio2 at 0x3e8-0x3ef irq 9 on isa
sio2: type 16550A

$ vmstat -i
interrupt      total      rate
sio0 irq4      134695        0
sio1 irq3     5828191       18
sio2 irq9     5167693       16

Running right now,

Connect time: 0:19:42
5336012 octets in, 596814 octets out
  overall     5019 bytes/sec
  currently   4765 bytes/sec (over the last 5 secs)
  peak       16148 bytes/sec on Wed Apr 19 18:48:01 2000

with no errors.
deflink HDLC level errors:
 Bad Frame Check Sequence fields: 0
 Bad address (!= 0xff) fields:    0
 Bad command (!= 0x03) fields:    0
 Unrecognised protocol fields:    0

After migrating to 4.0R, with a GENERIC kernel, sio2 enabled
or manually configured using the boot floppy setting sio2/IO_COM3/irq9
I'm rewarded with 
sio2: configured irq 9 not in bitmap of probed irqs 0

Seems that it's clear sio2 works under 3.4R, it's expected to work
under 4.0R without fiddling.  Afterall it worked fine under 2.2.8R
through 3.4R. Moving the card to si3/0x2e8/irq9 also returned the same
bitmap error.

What's the magic to make it work under 4.0R?




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