User`s manual

7–77Digital Emulation
Cursor Up (CUU)
ASCII Code ESC [ Pn A
Hex Code 1B 5B Pn 41
Dec Code 27 91 Pn 65
Purpose Causes the active position to move to the corresponding column at the
preceding vertical position set by the Pn value.
Discussion If you try to move the active position above the top line, the active
position stops at the top line.
Pn is the number of lines that the active line moves up at the current active
column. Default value: Pn = 1.