| Return Code | Value | Description |
| UNKNOWN_FUNCTION | 81h | Unknown, or invalid, function number passed |
| FUNCTION_NOT_SUPPORTED | 82h | The function is not supported on this system. |
| INVALID_HANDLE | 83h | Device node number/handle passed is invalid or out of range. |
| BAD_PARAMETER | 84h | Function detected invalid resource descriptors or resource descriptors were specified out of order. |
| SET_FAILED | 85h | Set Device Node function failed. |
| EVENTS_NOT_PENDING | 86h | There are no events pending. |
| SYSTEM_NOT_DOCKED | 87h | The system is currently not docked. |
| NO_ISA_PNP_CARDS | 88h | Indicates that no ISA Plug and Play cards are installed in the system. |
| UNABLE_TO_DETERMINE_DOCK_ CAPABILITIES | 89h | Indicates that the system was not able to determine the capabilities of the docking station. |
| CONFIG_CHANGE_FAILED_NO_ BATTERY | 8Ah | The system failed the undocking sequence because it detected that the system unit did not have a battery. |
| CONFIG_CHANGE_FAILED_ RESOURCE_CONFLICT | 8Bh | The system failed to successfully dock because it detected a resource conflict with one of the primary boot devices; such as Input, Output, or the IPL device. |
| BUFFER_TOO_SMALL | 8Ch | The memory buffer passed in by the caller was not large enough to hold the data to be returned by the system BIOS. |
| USE_ESCD_SUPPORT | 8Dh | This return code is used by functions 09h and 0Ah to instruct the caller that reporting resources explicitly assigned to devices in the system to the system BIOS must be handled through the interfaces defined by the ESCD Specification. |
| MESSAGE_NOT_SUPPORTED | 8Eh | This return code indicates the message passed to the system BIOS through function 04h, Send Message, is not supported on the system. |
| HARDWARE_ERROR | 8Fh | This return code indicates that the system BIOS detected a hardware failure. |