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$FreeBSD$
.Dd August 31, 2004 .Dt VPD 4 i386 .Os .Sh NAME .Nm vpd .Nd "Vital Product Data kernel interface" .Sh SYNOPSIS .Cd "device vpd" .Sh DESCRIPTION .Tn IBM ThinkPad notebooks (and most .Tn IBM desktop PCs) have a 48-byte Vital Product Data (VPD) structure located in the BIOS Shadow RAM.
p The VPD provides machine type and model information, the build ID (this is roughly the BIOS version) and serial number information.
p The .Nm driver scans the BIOS area and claims the memory used by the VPD structure. It provides the .Xr sysctl 3 branch .Va hw.vpd to allow this information to be accessed by the userland. The following variables are provided, one per VPD attachment (there should only be one):
p l -tag -width ".Dv MACHINE_MODEL" -compact t Dv MACHINE_TYPE
q Va machine.type Machine type. t Dv MACHINE_MODEL
q Va machine.model Machine model. t Dv BUILD_ID
q Va build.id BIOS Build ID. t Dv SERIAL_BOX
q Va serial.box Box Serial Number. t Dv SERIAL_PLANAR
q Va serial.planar Motherboard Serial Number. .El .Sh SEE ALSO .Rs .%T "TP General - Using the BIOS Build ID to identify IBM ThinkPad systems" .%N "Reference #: MIGR-45120" .%D "November 22, 2002" .%U "http://www.ibm.com/support/docview.wss?uid=psg1MIGR-45120" .Re .Sh HISTORY The .Nm driver first appeared in .Fx 5.1 . .Sh AUTHORS The .Nm driver and this manual page were written by .An Matthew N. Dodd Aq mdodd@FreeBSD.org .