hi;
erik malund wrote:
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1) Do you really need a RTOS ?. In a workloop environment it is dead easy to start every task with "if you have nothing to do, get out."
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yes. my application involves interfacing with ethernet.my initial proto without timer tick(infinite block)is working ok.

2) If you have an unused interrupt, you can set that at a lower priority than all other interrupts (easier if you use a 4 level priority drivative) and by toggling the activating flag create a "task" that has a priority between actual interrupts and the main.
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.only 2 priority levels.i am using
80c552.
regards
pranav