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

Hi pjv,
I think I've got it right now.
One question though, just before pushstat in saveMainLoopContext,
you clear w to make reti work.
In your original RTOS you have in startT1
  mov w,#T1uSec10>>4&$E0 ;high 3 address bits
  pushstat   ;prep thread address hi

which preserves the high 3 bits of the T1 thread code.
But these are already loaded in pc shadow.
Why must these status bits be setup, and if so, shouldn't
I setup status with 3 high bits of MainIsr address instead of 0?

regards peter

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