spdmem(4)

spdmem4

Serial presence detect memory

Usage

spdmem* at iic?

# macppc spdmem* at mem?

Overview

The spdmem driver retrieves information about memory modules from an onboard EEPROM, standardised as JEDEC 21-C. Currently spdmem is able to decode information relating to SDRAM and DDR/DDR2/DDR3 SDRAM.

Releases

39 releases since OpenBSD 4.3; the text changed 4 times.

  1. 4.3–4.5
  2. 4.6–4.7
  3. 4.8–5.3
  4. 5.4–6.9
  5. 7.0–8.0

History

The spdmem device driver first appeared in OpenBSD 4.3.

Authors

The spdmem driver was written by Nicolas Joly, Paul Goyette, and Tobias Nygren and ported to OpenBSD by Jonathan Gray ⟨[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.