Specifications

QSSC-S4R Technical Product Specification BIOS Role in Server Management
229
Of
f
set Name Length Value Description
Handle
08h Total Width Word Varies Total width, in bits, of this memory device, including any check or ECC bits.
If no error-correction bit is present, total width = data width.
0Ah Data Width Word Varies The data width in bits.
0Ch Size Word Varies The size of the memory device in MB if bit[15] = 0, or in KB if bit[15] = 1. If
the socket is empty or if there is an error, this should be 0.
0Eh Form Factor Byte Enum 09h = DIMM
0Fh Device Set Byte Varies Identifies when the memory device is one of a set of memory devices that
must be populated with all devices of the same type and size, and the set to
which this device belongs. A value of 0 indicates that the device is not part
of a set; a value of FFh indicates that the attribute is unknown. The device
sets are based on the lock-stepped operation concept. Therefore, an DDR3
DIMM always belongs to a unique lock- stepped pair (or device set).
Note: A device set number must be unique within the context of the memor
y
array containing this memory device.
10h Device Locator Byte String The string number of the string that identifies the physically-labeled (from
the label on the server board) socket or board position where the memory
device is located, for example , “
DIM M_A1” .
11h Bank Locator Byte String The string number of the string that identifies the physically labeled bank
where the memory device is located, for example,- “
Ba nk 1” . Intel
®
server
boards and systems that use the Intel
®
Boxboro- EX chipset do NOT
support a memory bank concept, and hence this field will be NULL.
12h Memory Type Byte Enum The type of memory device. This value is always set to 01h (Other), until a
DDR3 type is defined by the specification.
13h Type Detail Word Bit Field
A
dditional details on the memory device type. Bit 7 = 1 (Synchronous).
15h Speed Word Varies Identifies the frequency.
17h Manufacturer Byte String The string number manufacturer of this memory device.
18h Serial Number Byte String The string number for the serial number of this memory device. This value
is set by the manufacturer and normally cannot be changed.
191h
A
sset Tag Byte String The string number for the asset tag of this device.
1Ah Part Number Byte String The string number for the part number of this memory device. This value is
set by the manufacturer and normally cannot be changed.
20.5.2.15 Type 19 Structure — Memory Array Mapped Address
The SMBIOS Type 19 structure describes the attributes of each contiguous memory address range in the server.
There is one Type 19 structure present for each address range. SMBIOS structure type 19 is not published for Slave
Memory Boards in Mirroring Mode.
20.5.2.16 Type 20 Structure — Memory Device Mapped Address
The SMBIOS Type 20 structure describes the attributes of each contiguous memory address range on a memory
device. There is one Type 20 structure present for each contiguous address range. In some cases, there may be
multiple Type 20 structures present for a single memory device. The BIOS creates one Type 20 entry per DIMM for
every memory region that is formed as a result of the Rank Interleaving performed by the chipset. Since the
interleaving spans across multiple ranks, this is only an approximate representation of the way a particular DIMM
participates in a given range of memory.
SMBIOS structure type 20 is not published for Slave Memory Boards in Mirroring Mode.Type 20 SMBIOS entry is
optional for QSSC-S4R Platform.
20.5.2.17 Type 24 Structure — Hardware Security
The SMBIOS Type 24 structure describes the current states of the password and front panel security features.
20.5.2.18 Type 32 Structure — System Boot Information
The SMBIOS Type 32 structure is utilized by the client's Pre-execution Environment (PXE) to identify the reason why
the PXE was initiated.