: Returns value read from the I/O address add
==== <code>INSTR</code> ==== : INSTR ([startposition,]explored string, seeking string) This function looks inside "explored string" after "seeking string" and return a number where the found string appear for the first time.Returns zero if not successfull.Startposition could be a figure between 1 and 255.]
==== <code>INT (n)</code> ====