| SII(4) | Device Drivers Manual (pmax) | SII(4) |
sii — SII SCSI
adaptor
sii* at ibus0 addr ?
scsibus* at sii?
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 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.
cd(4), ch(4), pmax/ibus(4), pmax/intro(4), scsi(4), sd(4), st(4)
The sii driver first appeared in
4.4BSD.
| July 28, 2017 | NetBSD 11.0 |