AVR Freaks seems to be a quite active community and will probablly get the forum for all my up coming questions according the AVR programming. I started reading thru a detailed introduction into the AVR assembler programming. Then there are some more and simple assembler code examples from Stanford University’s Embedded System Design Laboratory, which seem to be specifically programmed for the ATtiny85 AVR. And another assembler ATtiny85 code example. If I got it right, the important thing for writing assembler code for an ATtiny85 chip, is to put the the correct include information at the beginning of one’s code. Which is for the ATtiny85: .include "tn85def.inc"