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EC(4) Device Drivers Manual EC(4)

ec
3Com EtherLink II (3c503) Ethernet device

ec0 at isa? port 0x250 iomem 0xd8000 irq 9

The ec device driver supports 3Com EtherLink II (3C503) Ethernet cards.
The EtherLink II supports two media types on a single card. All support the AUI media type. The other media is either BNC or UTP behind a transceiver. Software cannot differentiate between BNC and UTP cards.
The ec driver supports the following media types:
 
 
10base5
Set 10base5 (thick-net) operation.
 
 
10base2
Set BNC (10base2/thin-net) or UTP operation.
For more information on configuring this device, see ifconfig(8). To view a list of media types and options supported by your card try “ifconfig <device> media”. For example, “ifconfig ec0 media”.

ec0: wildcarded IRQ is not allowed
The IRQ was wildcarded in the kernel configuration file. This is not supported.
ec0: invalid IRQ <n>, must be 3, 4, 5, or 9
An IRQ other than the above listed IRQs was specified in the kernel configuration file. The EtherLink II hardware only supports the above listed IRQs.
ec0: failed to clear shared memory at offset <off>
The memory test was unable to clear the interface's shared memory region. This often indicates that the card is configured at a conflicting iomem address.

ifmedia(4), intro(4), isa(4), hostname.if(5), ifconfig(8)
September 7, 2008 OpenBSD-current