IAI America IA-T-XA (ANSI standard CE mark agreement) - Manual (Page 46)

Enter a numeric value of 1 for Op-1 and press the
return key.
Press the WRT key to transfer the program data to
the controller.
* When the screen is changed with the PAGE UP
and PAGE DOWN keys or ESC key before data
transfer, the input data becomes invalid.
Press the ESC key twice to display the screen for
step No. 4.
Then, delete MOVL 6. Enter 9 for the step No.
directly with the ten-key numeric pad while keeping
the cursor position, or press the PAGE UP key 5
times to display MOVL 6.
(Cursor located at step No. 9)
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