SNC(4)

NAME
snc - National Semiconductor DP8393X SONIC Ethernet adapter driver

SYNOPSIS
device isa
device snc

DESCRIPTION
The snc driver provides support for the National Semiconductor SONIC Ethernet adapters.

HARDWARE
The snc driver supports the following cards:

•   National Semiconductor DP83934AVQB
•   NEC PC-9801-83
•   NEC PC-9801-84
•   NEC PC-9801-103
•   NEC PC-9801-104
•   NEC PC-9801N-15
•   NEC PC-9801N-25
•   NEC PC-9801N-J02 PCMCIA
•   NEC PC-9801N-J02R PCMCIA

The snc driver also includes support for the National Semiconductor NS46C46 as 64 * 16 bits Microwave Serial EEPROM.

IMPLEMENTATION NOTES
Accessing SONIC card data structures and registers as 32 bit values makes code endianness independent. The SONIC is however always in big-endian mode so it is necessary to ensure that data structures shared between the CPU and the SONIC card are always in big-endian order. The snc driver supports the PC-98 C-Bus, and PnP buses. Support is also provided for the legacy C-Bus.

DIAGNOSTICS
The following driver specific error messages may be reported:

snc%d: snc_nec16_register_irq: unsupported irq (%d) The card returned an IRQ which is not supported by the driver.

snc%d: invalid packet length %d bytes An attempt to transfer a data packet failed due to an invalid packet length.

SEE ALSO
netintro(4), bus_alloc_resource_any(9)

HISTORY
The snc driver was ported from NetBSD by -nosplit Motomichi Matsuzaki <mzaki@e-mail.ne.jp> and Hiroshi Yamashita <bluemoon@msj.biglobe.ne.jp>. It first appeared in FreeBSD 4.2. This manual page first appeared in FreeBSD 5.3.

AUTHORS
This manual page was written by Tom Rhodes <trhodes@FreeBSD.org>.

BUGS
Currently the snc driver only works on the PC-98 architecture. It should probably work on the i386 architecture as well.