SII(4) Device Drivers 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), pmax/pmax/ibus(4), pmax/pmax/intro(4), sd(4), st(4)

HISTORY

The sii driver first appeared in 4.4BSD.
February 17, 2017 NetBSD 8.2