| SII(4) | Device Drivers Manual (pmax) | SII(4) | 
sii —
sii* at ibus0 addr ?
scsibus* at sii?
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 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.
sii driver first appeared in
  4.4BSD.
| July 28, 2017 | NetBSD 10.1 |