Oleg,

I have had NO applications of the hundereds I have made where a timing was required. I did, however dabble in something like that till I came up with the 'soft interrupt' which used to be done by7 a TF, but with the newer chips you have so many that you will always find some int generating bit other than the timers that you do not use.

I have not done this (yet), but with the chips with 10+ int sources I can visualize multiple 'soft interrupts'.

I got the idea from working with the Philips XA that has 8 designated soft interrupts.

Erik