OSIOP(4)                  OpenBSD Programmer's Manual                 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 con-
     troller chip.

     The Symbios/NCR 53C700 SCSI controller is handled by the oosiop(4) driv-
     er, 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/rese-
     lect or performance will suffer.

SEE ALSO
     cd(4), ch(4), intro(4), oosiop(4), scsi(4), sd(4), siop(4), ss(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.

OpenBSD 4.7                    February 17, 2009                             1
