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sys [2019/05/07 22:09] – created neilssys [2019/05/07 22:10] (current) – neils
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 The ''SYS'' command calls a machine language routine at the specified address.  The ''SYS'' command calls a machine language routine at the specified address. 
  
-The expression must return an integer and will be treated as unsigned. Once the machine language routine returns using the ''RTS'' opcode, the **XC=BASIC** program will continue at the next line.+The expression must evaluate to an integer and will be treated as unsigned. Once the machine language routine returns using the ''RTS'' opcode, the **XC=BASIC** program will continue at the next line.
  
 Note that ''SYS'' can't pass parameters to the machine language routine, nor can get any return value. For calling machine language functions, see ''[[USR|USR()]]''. Note that ''SYS'' can't pass parameters to the machine language routine, nor can get any return value. For calling machine language functions, see ''[[USR|USR()]]''.