IBM RS/6000 44P 270 Service Manual page 334

Table 8. Current PCI 2.1 Class Code Definition
PCI Base
Class (lower
nibble) S2
0
1
2
3
4
5
316
Service Guide
PCI Sub-Class Description
S3 -S4
Devices that were built before the class code field was defined.
00 All currently implemented devices except VGA-compatible
devices.
01 VA-compatible devices
Mass storage controller
00 SCSI bus controller
01 IDE controller
02 Floppy disk controller
03 Intelligent Peripheral Interface (IPI) bus controller
04 Redundant Array of Independent Disk (RAID) controller
80 Other mass storage controller
Network controller
00 Ethernet controller
01 Token Ring controller
02 FDDI controller
03 ATM controller
80 Other network controller
Display controller
00 VGA-Compatible controller
01 Extended Graphics Array (XGA) controller
80 Other display controller
Multimedia device
00 Video device
01 Audio device
80 Other multimedia device
Memory controller
00 RAM
01 Flash
80 Other memory controller