NAME    [Toc]    [Back]

     osiop - Symbios/NCR 53C710 SCSI driver

SYNOPSIS    [Toc]    [Back]

     osiop* at gsc? irq 9                   (hppa)
     osiop0 at pcctwo0 offset 0x47000 ipl 2 (mvme88k)
     scsibus* at osiop?

DESCRIPTION    [Toc]    [Back]

     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    [Toc]    [Back]

     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    [Toc]    [Back]

     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    [Toc]    [Back]

     The osiop driver first appeared in NetBSD 1.6.

     The  original NCR 53C710 driver appeared in NetBSD 1.0 amiga
port, and
     Izumi Tsutsui <[email protected]> modified the  driver
and made it
     machine-independent.

OpenBSD      3.6                          March      12,     2004