Most PC printers are connected to the parallel printer interface. For this reason, PRT returns the value 10 instead of 701. Programs with statements that use PRT explicitly, such as "PRINTER IS PRT" need not be changed if a parallel printer is used on the PC. To change PRT back to 701, for IEEE-488 printers at primary address 1, use the statement "CONFIGURE PRT TO 701". You may find it convenient to include this statement in your AUTOST file. This statement is not necessary if you use the value 701 (or any other value) explicitly.