unable to install two network cards

["Fred Wucherpfennig (RD)" <FredWucher@rubydist.com>]

Hello,

I'm attempting to install OpenBSD 2.9 (downloaded, Generic) on a Dell
Optiplex GL5133 (32M ram) to use as a firewall machine.  When I install two
network cards, I get a panic-halt because it attempts to assign both cards
to the same port 0x300, although it does give them different irq's.

The bios of this machine does not allow me to set addresses and/or irq's for
the nic.  The nics are 3Com etherlink III 3C509TP  8352-10 Rev G.  I have a
couple of other rev F or rev G cards, the results are identical.

The machine has integrated video, two isa slots (one shared), two pci slots.
There are no other cards in the machine except the two network cards.

Here is the detail: (of what I can see to reproduce)

cd0 at scsibus0 targ 1 lun 0: <NEC, CD-ROM DRIVE: 282, 3.07> scsio 5/cdrom
removable
wd0 at pciide0 channel 0 drive 0: <WDC AC22500L>
wd0: 16-sector PIO, LBA, 2441 MB, 4960 cyl, 16 head, 63 sec, 4999680 sectors
pciide0: channel 0 interupting at irq 14
wd0 (pciide0:0:0): using PIO mode 0, DMA mode 1
cd0 (pciide0:0:0): using PIO mode 0, DMA mode 1
pciide0: channel 1 ignored (disabled)
vga1 at pci0 dev16 function 0 "S3 Trio 32/64" rev 0x00
wsdisplay0 at vga1: console (80x25, vt100 emulation)
wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
isa0 at pcib0
isadma0 at isa0
pckbc0 at isa0 port 0x65/5
pckbc0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0: console keyboard, using wsdisplay0
ep0 at isa0 port 0x300/16 irq 3:  address 00:20:af:10:03:40, utp/ani
(default utp)
ep1 at isa0 port 0x300/16 irq 10:panic: ep_isa_attach: can't map i/o space

When I boot with just one network card in, its just fine and I have that
card set up.  When I add the second card, it crashes with the above message.
When I first started, I tried it with both cards installed, and it crashed,
I decided to install with just one card to get the os running, etc. but now
am stuck at this point.

When I have just one card in, ifconfig ep0 returns the following:
ep0: flags=8893<UP, BROADCAST, NOTRAILERS, RUNNING, SIMPLEX, MULTICAST> mtu
1500
media: Ethernet 10baseT
inet 192.168.10.55 netmask 0xffffff00 broadcst 192.168.10.255
inet6 fe80::220:afff:fe99:9b67% ep0 prefixlen 64 scopeid 0x1

According to the manual pages, it should report the address and irq, but it
doesn't - or else I can't find the correct command.  The manual implies
there is an 'ep' command that will allow me to specify the address and irq
of the nic, but typing 'ep' or 'ep0' at the command prompt results in
"command not found"

How do I work around this issue?

I thank you for your work on this program, and on my issue.

Fred W.