 
VT52 sequences
  Ansi mode
    Esc  <
    033 074
  Cursor positioning
    Up    Esc  A
          033 101
    Down  Esc  B
          033 102
    Right Esc  C
          033 103
    Left  Esc  D
          033 104
    Home  Esc  H
          033 110
    Direct cursor address
      Esc  Y  <line+040> <columns+040>
      033 131
    Reverse linefeed       Esc  I
                           033 111
    Erase to end of line   Esc  K
                           033 113
    Erase to end of screen Esc  J
                           033 112
    Auto print on          Esc  ^
                           033 136
    Auto print off         Esc   
                           033 137
    Printer controller on  Esc  W
                           033 127
    Printer controller off Esc  X
                           033 130
    Print cursor line      Esc  V
                           033 135
    Print screen           Esc  ]
                           033 135
    Indentify request      Esc  Z
                           033 132
    Response to indetify   Esc  /   Z
     request (VT52)        033 057 132
    Special charset (same  Esc  F
     as line draw in VT102 033 106
    Normal char set        Esc  G
                           033 107
 
