RTEMS C User's Guide
The rtems_interrupt_catch
directive establishes an ISR for
the system. The address of the ISR and its associated CPU
vector number are specified to this directive. This directive
installs the RTEMS interrupt wrapper in the processor's
Interrupt Vector Table and the address of the user's ISR in the
RTEMS' Vector Table. This directive returns the previous
contents of the specified vector in the RTEMS' Vector Table.
RTEMS C User's Guide
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