Currently Active Object Pointer (changes)
Showing changes from revision #2 to #3:
Added | Removed | Changed
WindowManager
» Messages
» Message Codes
» Message_TaskInitialise
» Currently Active Object Pointer
Currently Active Object Pointer
Notes
This is the pointer to the address of the last:
- application started
- error handler called
- exit handler called
Which allows OS_Module to determine whether a module can be killed.
For Absolute files and other code loaded into application space, the CAO will typically be set to &8000, i.e. the base of application space.
When a module task is started (e.g. via OS_Module 0), the CAO will be set to the address of the module.
See also
Social
Follow us on
and
and
ROOL Store
Buy RISC OS Open merchandise here, including SD cards for Raspberry Pi and more.