NAME
osiop
—
Symbios/NCR 53C710 SCSI
driver
SYNOPSIS
osiop* at gsc? irq 9
(hppa)
osiop0 at mc0 offset 0x47000 ipl 2
(mvme68k)
osiop0 at pcctwo0 offset 0x47000 ipl 2
(mvme68k/mvme88k)
scsibus* at osiop?
DESCRIPTION
The osiop
driver provides support for the
Symbios/NCR 53C710 SCSI controller chip.
The Symbios/NCR 53C700 SCSI controller is handled by the oosiop(4) driver, while the Symbios/NCR 53C8xx PCI SCSI host adapters are handled by the siop(4) driver.
CONFIGURATION
The osiop
driver supports the following
flags
for use in config(8) 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), intro(4), oosiop(4), scsi(4), sd(4), siop(4), st(4), uk(4)
http://www.lsilogic.com/
HISTORY
The osiop
driver first appeared in
NetBSD 1.6.
The original NCR 53C710 driver appeared in NetBSD 1.0 amiga port, and Izumi Tsutsui ⟨tsutsui@ceres.dti.ne.jp⟩ modified the driver and made it machine-independent.