OSIOP(4)

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.