Jan, as I replied to Wouter, I had somehow got the wrong meaning of sts fixed in my head. Talking (mailing) to you people has unlocked the brain. Many thanks for the help. Robert
David Brown, yes, I used this as an exercise to understand the in-line assembler stuff. The actual function is not as important as the understanding why. Thanks for your input, Robert Robert, > I didn't understand the compiler/assembler interaction It's not trivial, indeed; on the other hand, it is unusually powerful. > I can't get an "sts var, Y" to work There is no such sts instruction. Take a look at the list of instruction at the end of every AVR datashet. You shouldn't look at Y as a register - rather, it is part of the instruction mnemonics. The AVR syntax is a bit confusing at this: many assemblers chose a more explucit (albeit more "verbose") syntax when it comes to "indirection" (e.g. @Rn in '51 or (HL) in Z80 or [xxx] in 6502 and '196 and others). Jan _______________________________________________ AVR-GCC-list mailing list AVR-GCC-list@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-gcc-list
