VAXstation 4000 SCSI
asc* at vsbus? csr 0x200c0080 (VS4000/60
asc* at vsbus? csr 0x25000080 (VS4000/9x)
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
asc driver supports the following
for use in config(8) files:
- bits 0-7:
- disable disconnect/reselect for the corresponding SCSI target
- bits 16-23:
- 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.
cd(4), ch(4), intro(4), scsi(4), sd(4), st(4), uk(4)
asc driver first appeared in
NetBSD 1.5. It has been supported in
OpenBSD since release 2.8.