Intel Itanium 2 Processor manual Processor Information ROM Format Sheet 3, Part Numbers, Features

System Management Feature Specifications

Table 6-4. Processor Information ROM Format (Sheet 3 of 4)

Offset/	# of	Function	Notes		Examples
Section	Bits
Package
37h	32	Package Revision	Four 8-bit ASCII characters	Itanium® 2 Package =
				INT2b, (1.50 GHz 4MB
				and above) = INT3b:
				•	37h = I
				•	38h = N
				•	39h = T
				• 3Ah = 2 or 3
3Bh	2	Substrate Revision	2-bit revision number	00
		Software ID
3Ch	8	Reserved	Reserved for future use	00h
3Dh	8	Checksum	1 byte checksum	Add up by byte and
				take 2’s complement
Part Numbers
3Eh	56	Processor Part Number	Seven 8-bit ASCII characters	Itanium 2 (900 MHz,
				1.0 GHz) = 80542KC.
				Itanium 2 processor
				(1.30 GHz -1.66 GHz) =
				80543KC:
				•	3Eh = “8”
				•	3Fh = “0”
				•	40h = “5”
				•	41h = “4”
				• 42h = “2” or “3”
				•	43h = “K”
				•	44h = “C”
45h	64	Processor Electronic	64-bit identification number	May have padded
		Signature		zeros
4Dh	168	Reserved	Reserved for future use	x0h
62h	8	Checksum	1 byte checksum	Add up by byte and
				take 2’s complement
Thermal Reference
63h	8	Upper Temp Reference	Hex value of thermal upper temp	Default = 113 for 1.66
		Byte	limit	GHz through 1.5
				GHz/4MB. Default =
				105 for all others.
64h	8	Thermal Calibration Offset	Number of degrees in error (±)	Default = 0
		Byte Present
65h	8	Reserved	Reserved for future use	00h
66h	8	Checksum	1 byte checksum	Add up by byte and
				take 2’s complement.
Features
67h	32	IA-32 Processor Core	From 32 bit CPUID	4387FBFFh
		Feature Flags
6Bh	64	Reserved	Reserved (Processor core	0000 0000 6380 811Bh
			feature flags implemented in the
			Itanium® processor family)

84 Datasheet