SIOP(4) | Device Drivers Manual | SIOP(4)

# NAME

`siop` — LSI/Symbios Logic/NCR 53c8xx SCSI interface

# SYNOPSIS

`siop* at pci?`

`# hppa`
`siop* at mainbus? irq 3`
`siop* at phantomas? irq 3`
`siop* at uturn? irq 3`

# DESCRIPTION

The `siop` driver provides support for following LSI/Symbios Logic/NCR 53c8xx and related SCSI controller chips:

- 53c720 and 53c770 (Fast-Wide SCSI)
- 53c810, 53c810a and 53c815 (Fast SCSI)
- 53c820, 53c825 and 53c825a (Fast-Wide SCSI)
- 53c860 (Ultra SCSI)
- 53c875 and 53c875j (Ultra-Wide SCSI)
- 53c876 (Dual Ultra-Wide SCSI)
- 53c885 (Ultra-Wide SCSI and Ethernet)
- 53c895 and 53c895a (Ultra2-Wide SCSI)
- 53c896 (PCI 64bit, dual Ultra2-Wide SCSI)
- 53c1010 (PCI 64bit, dual Ultra3-Wide SCSI. NOTE: at this time `siop` supports at most Ultra2-Wide with this chip)
- 53c1510D (dual Ultra2-Wide SCSI)

`siop` replaces the older `ncr` driver which supported most of these devices.

Older 53C700 and 53C710 controllers are supported by the oosiop(4) and osiop(4) drivers, respectively.

# SEE ALSO

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

# HISTORY

The `siop` driver first appeared in NetBSD 1.5, OpenBSD support was added in OpenBSD 2.9.

# AUTHORS

The `siop` driver was written by Manuel Bouyer <Manuel.Bouyer@lip6.fr> for NetBSD. It was ported to OpenBSD with 53c1010 support added by Ken Westerback <krw@openbsd.org> using code from the FreeBSD sym-2 driver written by Gerard Roudier <groudier@FreeBSD.org>.

February 17, 2022 | Debian