82845MP datasheet(71/157 Pages) INTEL

71 / 157 page

Intel

® 82845MP/82845MZ Chipset-Mobile (MCH-M)

250687-002

Datasheet

3.7.25.

ACAPID – AGP Capability Identifier Register – Device #0

Address Offset:

A0-A3h

Default Value:

0020_0002h

Access:

Read Only

Size:

32 bits

This register provides standard identifier for AGP capability.

Bit

Description

31:24

Reserved.

23:20

Major AGP Revision Number (MAJREV): These bits provide a major revision number of AGP

specification to which this version of MCH-M conforms. This field is hardwired to value of “0010b” (i.e.

implying Rev 2.x).

19:16

Minor AGP Revision Number (MINREV): These bits provide a minor revision number of AGP

specification to which this version of MCH-M conforms. This number is hardwired to value of “0000”

(i.e. implying Rev x.0)

Together with major revision number, this field identifies MCH-M as an AGP REV 2.0 compliant

device.

15:8

Next Capability Pointer (NCAPTR): AGP capability is the first and the last capability described via

the capability pointer mechanism and therefore these bits are hardwired to “0” to indicate the end of

the capability linked list.

7:0

AGP Capability ID (CAPID): This field identifies the linked list item as containing AGP registers. This

field has a value of 0000_0010b assigned by the PCI SIG.

82845MP Datasheet(PDF) 71 Page - Intel Corporation