5 - parse errors: die vs. usage
9 - extend the register table
11 Capabilities with partial decoding:
12 - PCIe 2nd set of control/status registers (have spec)
13 - HyperTransport caps (have spec)
15 Capabilities with no decoding:
18 - CompactPCI central resource control
21 - SATA HBA (have spec)
22 - Advanced features (have spec)
23 - Advanced Error Reporting (ext'd)
24 - Virtual Channel (ext'd)
25 - Power Budgeting (ext'd)
26 - Root Complex * (ext'd)
27 - Multi-Function Virtual Channel (ext'd)
28 - Root Bridge Control Block (ext'd)
29 - Access Controls (ext'd)