In SX Microcontrollers, SX/B Compiler and SX-Key Tool, peterverkaik wrote:

Bean,
Your example works, but is very limited in cycles, so you can only 
have very small tasks. 

The context switch enables a subroutine to execute directly after the isr
exits and before returning to the mainloop. The way it is set up, this
subroutine can not be interrupted by another task, only by the isr, but the
isr then never does a context switch.
The task may take a considerable longer time than the isr allows.

regards peter

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