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

# NAME

`osiop` — Symbios/NCR 53C710 SCSI driver

# SYNOPSIS

`osiop* at gsc? irq 9` (hppa)

# DESCRIPTION

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

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

cd(4), ch(4), intro(4), oosiop(4), scsi(4), sd(4), siop(4), st(4), uk(4)

# 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.

February 17, 2022 | Debian