i figured out what interfere, i have readcode command in my (basic)ISR, and read in main-loop, after i commented readcode in isr read in main-loop has began to work, so, now i have to find another way
for reading LED gamma table in isr, or pattern eeprom in main, at least I found what interfere, and the way will come, maybe put read in isr too.... there is more than 500ln of code so it will probably make
treed dirty with non important/regarded stuff...
..it is good to know that there isn't other problems with dt-ints and read.
...found interesting or sad errata for 16f1827 http://ww1.microchip.com/downloads/e...Doc/80485G.pdf so ih you bught chip with 1M/100k read write eeprom/flash, you actually get 1k/10k , good to know for save lifespan with fewer writes... i was reading that when couldn't read eeprom...
(sorry for my bad English if sentences sometime don't have sense

thanx anyway,