Service_USB 33 - USB host controller driver Hub status change — Broadcast by an USB host controller driver to inform other applications about events inside USB host controller driver Hubs.
R0 | 33 (reason code) |
R1 | &80C00 (USB Service call) |
R0 | preserved |
R1 | preserved to pass on (do not claim) |
R2, R3, R4 | preserved |
Do not use.
Service is not implemented. Use USB messaging system for this functionality.