diff --git a/README.md b/README.md
index 77e485d..6046eec 100644
--- a/README.md
+++ b/README.md
@@ -41,22 +41,29 @@ These features can be turned off by defining 'strict'.
 So far:
 * `:` -- print cell value (decimal)
 * `;` -- read number to current memory cell (decimal)
-* `@` -- write a random integer in current memory cell
+* `0`..`255` -- any decimal number is directly put into the current cell
+* `_` -- delay for the current cell value in milliseconds
 * `(` -- binary shift left current memory cell
 * `)` -- binary shift right current memory cell
 * `{` -- decimal shift left current memory cell
 * `}` -- decimal shift right current memory cell
-
-Any decimal number in the code is directly read into the 
-current memory cell, so `128+` sets the current value to 129, 
-`0` zeroes a cell and so on.
+* `@` -- write a random integer in current memory cell
 
 AVR Instructions - `shelly_avr.c`
 -------------------------------
 
 So far:
-* `_` -- delay for the current cell value in milliseconds
+* `o` -- set digital outputs to bitmask in current cell
+* `p` -- set PWM1 to cell value
+* `P` -- set PWM2 to cell value
+* `a` -- current cell selects the analog channel to be read, ADC 
+         value is then written to the current cell
 
 If there is a pending `$` on the input line between two instructions,
 the execution stops (because CTRL-C or CTRL-D won't work).
 
+These are all just some ideas and can be completely changed, removed,
+rewritten or whatever, to fit your needs. Shelly should only give 
+some kind of a foundation. One that can be shaped to anything you 
+need - that’s the idea.
+
diff --git a/shelly_avr.c b/shelly_avr.c
index 2f24377..6dc11a0 100644
--- a/shelly_avr.c
+++ b/shelly_avr.c
@@ -23,11 +23,7 @@ extern uint8_t tape[SHELLY_TAPESIZE];
 #ifdef __AVR_ARCH__
 int shelly_avr(const char **ip)
 {
-	if (**ip == '_') {
-		unsigned tmp;
-		for (tmp=0; tmp<tape[tp]; tmp++, _delay_ms(1));
-	}
-	else if (**ip == 'o') 
+	if (**ip == 'o') 
 		PORTD = (tape[tp]<<2)&0xFC;
 	else if (**ip == 'a') {
 		ADMUX = (tape[tp]&3)|(1<<REFS1)|(1<<REFS0);
diff --git a/shelly_extra.c b/shelly_extra.c
index 5e6686a..65919bd 100644
--- a/shelly_extra.c
+++ b/shelly_extra.c
@@ -38,6 +38,14 @@ int shelly_extra(const char **ip)
 		--(*ip);
 		tape[tp] = num;
 	}
+	else if (i == '_') {
+		unsigned tmp;
+#ifdef __AVR_ARCH__
+		for (tmp=0; tmp<tape[tp]; tmp++, _delay_ms(1));
+#else
+		for (tmp=0; tmp<tape[tp]; tmp++, usleep(1000));
+#endif
+	}
 	else if (i == '(') tape[tp] <<= 1;
 	else if (i == ')') tape[tp] >>= 1;
 	else if (i == '{') tape[tp] *= 10;