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 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.

Debian                                          September 4, 2004                                         SNC(4)