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OSIOP(4) |
Kernel Interfaces Manual |
OSIOP(4) |
NAME
osiop — Symbios/NCR 53C710 SCSI driver
SYNOPSIS
arc
osiop* at jazzio? flags 0x00000
ews4800mips
osiop* at sbdio? flags 0x00000
hp700
osiop0 at gsc? flags 0x00000
mvme68k
osiop0 at pcctwo? ipl 2
scsibus* at osiop?
DESCRIPTION
The
osiop driver provides support for the Symbios/NCR 53C710 SCSI controller chip.
For the Symbios/NCR 53C700 SCSI host adapters, use the oosiop(4) driver.
For the Symbios/NCR 53C8xx PCI SCSI host adapters, use the siop(4) or esiop(4) driver.
CONFIGURATION
The
osiop 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
-
bits 16:
-
disable DMA interrupts
“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),
esiop(4),
intro(4),
oosiop(4),
scsi(4),
sd(4),
siop(4),
ss(4),
st(4),
uk(4),
scsipi(9)
HISTORY
osiop driver first appeared in
NetBSD 1.6.
The original NCR 53C710 driver appeared in NetBSD 1.0 amiga port, and Izumi Tsutsui <tsutsui@NetBSD.org> modified the driver and made it machine-independent.