SPDMEM(4)

SPDMEM(4) | Kernel Interfaces Manual | SPDMEM(4)

# NAME

spdmem — Generic Memory Module Serial Presence Detect

# SYNOPSIS

spdmem* at iic? addr 0x50
spdmem* at iic? addr 0x51
spdmem* at iic? addr 0x52
spdmem* at iic? addr 0x53

# DESCRIPTION

The spdmem driver provides support for generic memory module Serial Presence Detect. During kernel boot it displays module type, and where possible, the size and rated speed of the memory module. Additional information such as bank configuration and width is printed if the kernel is booted in verbose mode.

The Serial Presence Detect data for each memory module is also made accessible to user mode via sysctl(8). An entry for each spdmem device is created under the hw top-level MIB.

# SEE ALSO

iic(4), intro(4)

# HISTORY

The spdmem driver first appeared in NetBSD 5.0.

# AUTHORS

The spdmem driver was written by Nicolas Joly <njoly@pasteur.fr> with additional work by Paul Goyette <paul@whooppee.com>.

August 10, 2007 | NetBSD 7.0