PCI Class Code

Class Code Table

Class Codes

Class	Description
0x00	Devices built before class codes (i.e. pre PCI 2.0)
0x01	Mass storage controller
0x02	Network controller
0x03	Display controller
0x04	Multimedia device
0x05	Memory Controller
0x06	Bridge Device
0x07	Simple communications controllers
0x08	Base system peripherals
0x09	Inupt devices
0x0A	Docking Stations
0x0B	Processorts
0x0C	Serial bus controllers
0x0D-0xFE	Reserved
0xFF	Misc

Class Code 0: Pre 2.0

Sub-Class	Prog. I/F	Description
0x00	0x00	All devices other than VGA
0x01	0x01	VGA device

Class Code 1: Mass Storage Controllers

Sub-Class	Prog. I/F	Description
0x00	0x00	SCSI Controller
0x01	0xXX	IDE controller. The Prog I/F is defined as follows: bits Desc 0 Operating mode (primary) 1 Programmable indicator (primary) 2 Operating mode (secondary) 3 Programmable indicator (secondary) 6..4 Reserved (zero) 7 Master IDE device
0x02	0x00	Floppy disk controller
0x03	0x00	IPI controller
0x04	0x00	RAID controller
0x80	0x00	Other mass storage controller

Class Code 2: Network Controllers

Sub-Class	Prog. I/F	Description
0x00	0x00	Ethernet controller
0x01	0x00	Token ring
0x02	0x00	FDDI controller
0x03	0x00	ATM controller
0x80	0x00	Other network conteroller

Class Code 3: Display Controllers

Sub-Class	Prog. I/F	Description
0x00	0x00	VGA compatable controller. Has mapping for 0xA0000..0xBFFFF and io addresses 0x3B0..0x3BB.
	0x01	8514 compatable
0x01	0x00	XGA controller
0x80	0x80	Other display controller

Class Code 4: Multimedia Devices

Sub-Class	Prog. I/F	Description
0x00	0x00	Video device
0x01	0x00	Audio device
0x80	0x00	Other multimedia device

Class Code 5: Memory Controllers

Sub-Class	Prog. I/F	Description
0x00	0x00	RAM controller
0x01	0x00	Flash memory controller
0x80	0x00	Other memory controller

Class Code 6: Bridge Devices

Sub-Class	Prog. I/F	Description
0x00	0x00	Host/PCI bridge
0x01	0x00	PCI/ISA bridge
0x02	0x00	PCI/EISA bridge
0x03	0x00	PCI/Micro Channel bridge
0x04	0x00	PCI/PCI bridge
0x05	0x00	PCI/PCMCIA bridge
0x06	0x00	PCI/NuBus bridge
0x07	0x00	PCI/CardBus bridge
0x80	0x00	Other bridge type

Class Code 7: Simple Communications Controllers

Sub-Class	Prog. I/F	Description
0x00	0x00	Generic XT compatable serial controller
	0x01	16450 compatable serial controller
	0x02	16550 compatable serial controller
0x01	0x00	Parallel port
	0x01	Bi-directional parallel port
	0x02	ECP 1.X parallel port
0x80	0x00	Other commonications device

Class Code 8: Base System Peripherals

Sub-Class	Prog. I/F	Description
0x00	0x00	Generic 8259 programmable interrupt controller (PIC)
	0x01	ISA PIC
	0x02	EISA PIC
0x01	0x00	Generic 8237 DMA controller
	0x01	ISA DMA controller
	0x02	EISA DMA controller
0x02	0x00	Generic 8254 timer
	0x01	ISA system timer
	0x02	EISA system timer
0x03	0x00	Generic RTC controller
	0x01	ISA RTC controller
0x80	0x00	Other system peripheral

Class Code 9: Input Devices

Sub-Class	Prog. I/F	Description
0x00	0x00	Keyboard controller
0x01	0x00	Digitizer (pen)
0x02	0x00	Mouse controller
0x80	0x00	Other input controller

Class Code A: Docking Stations

Sub-Class	Prog. I/F	Description
0x00	0x00	Generic docking station
0x80	0x00	Other type of docking station

Class Code B: Processors

Sub-Class	Prog. I/F	Description
0x00	0x00	386
0x01	0x00	486
0x02	0x00	Pentium
0x10	0x00	Alpha
0x20	0x00	PowerPC
0x40	0x00	Co-Processor

Class Code C: Serial Bus Controllers

Sub-Class	Prog. I/F	Description
0x00	0x00	Firewire (IEEE 1394)
0x01	0x00	ACCESS bus
0x02	0x00	SSA (Serial Storage Architecture)
0x03	0x00	USB (Universal Serial Bus)