Manual browser: sm(4)

SM(4) Kernel Interfaces Manual SM(4)


smSMC91Cxx-based Ethernet interfaces device driver


sm0 at isa? port 0x300 irq 10
sm* at mhzc?
sm* at pcmcia? function ?
sm* at nubus?


The sm device driver supports SMC91C9x-based and SMC91C1xx-based Ethernet interfaces.

The ISA attachment of the sm driver supports any SMC91C9x-based Ethernet interface on the ISA bus, including the EFA Info*Express SVC VLB interface, and the on-board SMC91C9x Ethernet found in many embedded PCs and laptop docking stations.

The mhzc attachment of the sm driver supports the Megahertz combo Ethernet and modem card.

The PCMCIA attachment of the sm driver supports Megahertz X-JACK Ethernet cards.

The nubus attachment of the sm driver supports SMC-based Ethernet cards for the macintosh.


The SMC91C1xx supports the MII interface and so the list of supported media depends on several factors, including which PHY is attached. The SMC91C9x supports AUI and UTP media types.

To enable the AUI media, select the 10base5 or aui media type with ifconfig(8)'s media directive. To select UTP, select the 10baseT or utp media type.

ifconfig(8)'s -m option will display the full list of supported media directives for a particular configuration.


sm0: unable to read MAC address from CIS
This indicates that the Ethernet address, which is stored in the CIS information on the Megahertz X-JACK PCMCIA Ethernet card, is corrupted.
November 10, 1997 NetBSD 7.0