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
spdmem* at iic? addr 0x54
spdmem* at iic? addr 0x55
spdmem* at iic? addr 0x56
spdmem* at iic? addr 0x57
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.
Some SPD ROMs also have a temperature sensor. It's supported by
sdtemp(4).
SEE ALSO
iic(4),
intro(4),
sdtemp(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>.