0010 IF, LPT1, 13, -, 0040 // if Print button pressed

0020 IF, CTRLP, 0040       // if Ctrl+P pressed

0030 GO, 0010

0040 OUT, LPT1, 5, -       // output begin print signle

0050 MRK, 0                // print must begin with this command

0060 MRK, N                // print all objects left

0070 MRK, E                // print must end with this command

0080 OUT, LPT1, 5, +       // output end print signle

0090 GO, 0010              // print next piece

0100 RET

