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 controller 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/reselect 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.