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OSIOP(4)		 BSD Kernel Interfaces Manual		      OSIOP(4)

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 con‐
     troller 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/rese‐
     lect 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 NetBSD 1.6.

     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.

BSD				 May 12, 2001				   BSD

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