Datasheet

Intel

82845G/82845GL/82845GV GMCH Datasheet 77

3.5.1.38 CAPREG—Capability Identification Register (Device 0)

Address Offset: E4h–E8h

Default: 0x_x105_A009h

Access: RO

Size 40 bits

Bit Description

39:28

Part Identifier.

0E1h = 82845GL

0B1h = 82845GV

000h = 82845G with Revision ID of 01h

030h = 82845G with Revision ID of 03h

27:24

CAPREG Version. This field has the value 0001b to identify the first revision of the CAPREG

definition.

23:16

Cap_length. This field has the value 05h indicating the structure length.

15:8

Next_Pointer. This field has the value A0h pointing to the next capabilities register, AGP Capability

Identifier Register (ACAPID). If AGP is disabled (IGDIS = 0), since this is the last pointer in the

device, it is set to 00h signifying the end of the capabilities linked list.

7:0

CAP_ID. This field has the value 09h to identify the CAP_ID assigned by the PCI SIG for Vendor

Dependent CAP_PTR.