I agree with him time slicing is not multitasking, it is another form of code execution line by line

I think that if I use one more pic I can multiask comfortable. In my latest project I used a main controller Pic 18f452 and a slave pic 16f628 to do real multitask. And it really working

I send slave pic processes serially,when it doing its process, main mcu does another things

When the main processor doing program saving or something else, slave pic cut material,count etc. However it is a industrial machine,it work fine. Now it has no problem,hope it has no problem.