SII(4) Kernel Interfaces Manual (PMAX) SII(4)

NAME

siiSII 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, and in the VAXstation 3100.

The sii is a medium-performance implementation of the SCSI-I common command 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), ibus(4), intro(4), sd(4), st(4)

HISTORY

The sii driver first appeared in 4.4BSD.
August 26, 2001 NetBSD 6.1