IBM 500 manual Vital Product Data, VPD Layout in SMBIOS, SMBIOS Type 11 Structure Layout

SurePOS 500 4846-XX5 Technical Reference

3.13 Vital Product Data

Vital Product Data (VPD) is the IBM-specific information about a system. The data includes values such as machine type, model, serial number, BIOS/Flash revision, system board unique ID, etc. VPD is accessed through SMBIOS, as defined in the SMBIOS specification.

3.13.1 VPD Layout in SMBIOS

This section describes the traditional VPD. Refer to the SMBIOS specification for methods of accessing these fields.

Data field	SMBIOS record Type and Field	Data type	Field length
	Type 0 “BIOS Version”	ASCII	7
BIOS level		string
	Example: X6KT100
	Type 1 “Product name” and “Version”	ASCII	7
Machine		string
type/model
	Example: 4846545
	The machine type/model does not have dashes or spaces in SMBIOS
System serial	Type 1 “Serial Number”	ASCII	7
number		string
Product Family	Type 1 “Family”, Type 11	ASCII	11
		string
	Type 1 “UUID”, offset 0Ah	hex	6
LAN MAC
	Usage: The LAN MAC address can be parsed from the Type 01 “UUID” field, offset 10 (0Ah).
Address	For example, if the UUID is 40 3E 4C 58 76 7B DA 11 A4 29 00 14 5E 14 00 15, the MAC
	address is 00 14 5E 14 00 15.

3.13.2 SMBIOS Type 11 Structure Layout

The format of the SMBIOS Type 11 Structure for OEM strings is as follows:

Offset	Name	Length	Value	Description
00h	Type	1 byte	0Bh	OEM strings structure indicator
01h	Length	1 byte	05h	Length of structure
02h	Handle	2 bytes	varies
04h	Count	1 byte	varies	Number of strings in this structure
05h	Product Family	11 bytes	ASCII	“SurePOS 500”
	String		string

3.13.3 VPD using Int 15h

;Get pointer to VPD block

mov ax, 0d207h

int 15h

;ES:DI now points to the following structure:

vpdDataStruc	STRUC
header		DW	55aah
vpdSignature		DB	'VPD'
vpdLength		DB	48
reserved		DB	7	dup(20h)
buildID		DB	9	dup(20h)
boxSerial		DB	7	dup(20h)
uniqueID		DB	11	dup(20H)
machineType		DB	7	dup(20h)
vpdChecksum		DB	?
vpdDataStruc	ENDS

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