NAME
asc
-
VAXstation 4000 SCSI controller
SYNOPSIS
asc* at vsbus? csr 0x200c0080 (VS-4000/60 or VLC)
asc* at vsbus? csr 0x25000080 (VS-4000/9x)
asc* at tc? (Not yet supported)
scsibus* at asc?
DESCRIPTION
The
asc
driver provides support for the
NCR
53c94-based SCSI host adapter
on the VAXstation 4000 series, and for the PMAZ-AA and related
TURBOchannel SCSI adapter option boards (also on the VAXstation
4000 series models which include support for the TURBOchannel
adapter).
CONFIGURATION
The
asc
driver supports the following
flags
for use in
config(1)
files:
- bits 0-7
- :
disable disconnect/reselect for the corresponding
SCSI
target
- bits 8-15
- :
disable synchronous negotiation for
SCSI
target
"Target
is synonymous with
SCSI
ID number.
Note that
SCSI
tape drives should be allowed to perform disconnect/reselect or performance
will suffer.
SEE ALSO
cd(4),
ch(4),
esp(4),
intro(4),
scsi(4),
sd(4),
st(4)
HISTORY
The
asc
driver first appeared in
NetBSD1.5.