Datasheet

Intel

82845G/82845GL/82845GV GMCH Datasheet 53

3.5.1.5 RID—Revision Identification Register (Device 0)

Address Offset: 08h

Default Value: See table below

Access: RO

Size: 8 bits

This register contains the revision number of the GMCH Device 0.

3.5.1.6 SUBC—Sub-Class Code Register (Device 0)

Address Offset: 0Ah

Default Value: 00h

Access: RO

Size: 8 bits

This register contains the Sub-Class Code for the GMCH Device 0.

3.5.1.7 BCC—Base Class Code Register (Device 0)

Address Offset: 0Bh

Default Value: 06h

Access: RO

Size: 8 bits

This register contains the Base Class Code of the GMCH Device 0.

Bit Description

7:0

Revision Identification Number (RID). This is an 8-bit value that indicates the revision identification

number for the GMCH Device 0.

82845G and 82845GL GMCH

01h = A1 Stepping

03h = B1 Stepping

82845GV GMCH

01h = A1 Stepping

Bit Description

7:0

Sub-Class Code (SUBC). This is an 8-bit value that indicates the category of Bridge into which the

GMCH falls.

00h = Host Bridge.

Bit Description

7:0

Base Class Code (BASEC). This is an 8-bit value that indicates the Base Class Code for the

GMCH.

06h = Bridge device.