OSIOP(4)

OSIOP(4) | Device Drivers Manual | OSIOP(4)

# NAME

`osiop` —
Symbios/NCR 53C710 SCSI driver

# SYNOPSIS

## arc

`osiop* at jazzio? flags 0x00000`

## ews4800mips

`osiop* at sbdio? flags 0x00000`

## hppa

`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.

May 12, 2001 | NetBSD 9.5