siop(4)

siop4

Lsi/symbios logic/ncr 53c8xx scsi interface

Usage

siop* at pci?

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

Overview

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.

Releases

53 releases since OpenBSD 2.9; the text changed 14 times.

  1. 2.9
  2. 3.0–3.1
  3. 3.2–3.3
  4. 3.4
  5. 3.5–3.6
  6. 3.7
  7. 3.8
  8. 3.9–4.0
  9. 4.1
  10. 4.2
  11. 4.3–5.2
  12. 5.3
  13. 5.4
  14. 5.5–7.0
  15. 7.1–8.0

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 ⟨[email protected]⟩ for NetBSD. It was ported to OpenBSD with 53c1010 support added by Ken Westerback ⟨[email protected]⟩ using code from the FreeBSD sym-2 driver written by Gerard Roudier ⟨[email protected]⟩.

From man 8.0-current-20261101 in OpenBSD 8.0-current (2026-11-01). Parsed by carta from the page's mdoc source.