sii(4) - NetBSD Manual Pages

SII(4)               NetBSD/pmax Kernel Interfaces Manual               SII(4)


NAME

     sii -- SII SCSI adaptor


SYNOPSIS

     sii* at ibus0 addr ?
     scsibus* at sii?


DESCRIPTION

     The sii driver provides support for the DEC SII SCSI adaptor ASIC used in
     the DECstation 2100, 3100, and 5100.

     The sii is a medium-performance implementation of the SCSI-I common com-
     mand set supporting synchronous and asynchronous SCSI devices.

     The SII cabling is unusual: the bulkhead connector is very similar to a
     standard submicro wide SCSI-II connector, but has the other gender.

     The sii chip only supports DMA to or from a fixed window in memory.  The
     driver uses this "window" area as a bounce buffer, copying data to and
     from the DMA region.


SEE ALSO

     cd(4), ch(4), pmax/ibus(4), pmax/intro(4), scsi(4), sd(4), st(4)


HISTORY

     The sii driver first appeared in 4.4BSD.

NetBSD 11.99                     July 28, 2017                    NetBSD 11.99