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Register Description
R
Intel
®
82845 MCH for SDR Datasheet 81
Address
Offset
Symbol Name Default Access
58–5Fh DRTC DRAM Read Thermal Management Control 0000000
0h
R/W/L
59–FFh — Reserved — —
3.6.1 VID1—Vendor Identification Register (Device 1)
Address Offset: 00–01h
Default Value: 8086h
Attribute: RO
Size: 16 bits
The VID1 register contains the vendor identification number. This 16-bit register combined with
the DID1 Register uniquely identifies any PCI device. Writes to this register have no effect.
Bit Description
15:0 Vendor Identification Number. This is a 16-bit value assigned to Intel. Intel VID = 8086h.
3.6.2 DID1—Device Identification Register (Device 1)
Address Offset: 02–03h
Default Value: 1A31h
Attribute: RO
Size: 16 bits
This 16-bit register combined with the VID1 register uniquely identifies any PCI device. Writes to
this register have no effect.
Bit Description
15:0 Device Identification Number. This is a 16-bit value assigned to the MCH Device 1.
MCH1 Device 1 DID = 1A31h.