Service_Hardware (changes)
Showing changes from revision #3 to #4:
Added | Removed | Changed
Hardware Abstraction Layer
» Other documentation
» Service_Hardware
Service_Hardware
(Service Call &D9)
| Entry | |
|---|---|
| R0 | Bits 0-7 |
| Bits 8-31 flags |
|
| R1 | |
| Exit | |
|---|---|
| - | Depends on |
Sub-reason code 0: Device added
Reason Codes
| Hex | Meaning | ||
|---|---|---|---|
| Device added | |||
| 1 | &01 | Device being removed |
This service call is issued by the OS after a new device has been added to the system.
Sub-reason code 1: Device being removed
| Exit | |
|---|---|
| R1 | 0 to object to device being removed |
| R0 → error block | |
| Other registers must be preserved | |
| Else all other registers must be preserved | |
This service call is issued by the OS before a device is removed from the system. Claiming the service call by setting R1 to 0 will block the removal of the device.
Information sources: Kernel.Docs.HAL.NewAPI, Kernel.s.HAL in CVS
Social
Follow us on
and
and
ROOL Store
Buy RISC OS Open merchandise here, including SD cards for Raspberry Pi and more.