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
NetBSD1.6.
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.