VT-52 ESCAPE CODE GUIDE
                     ~~~~~~~~~~~~~~~~~~~~~~~


     
       A. Screen positions   
          The  following  functions control a cursor's position on
     screen.

          <ESC>A  Cursor Up, the horizontal position stays same.
          <ESC>B  Cursor Down.
          <ESC>C  Cursor Right.
          <ESC>D  Cursor Left.
          <ESC>H  Cursor Home,  move cursor to the  upper  left 
                  corner of the screen.
          <ESC>I  Reverse Line Feed, same as <ESC>A except  if the
                  cursor  is in the  top line,  a  blank  line  is 
                  inserted  and  the  remainder  of  the  text  is 
                  scrolled down.
          <ESC>L  Insert  Line,  insert   a  blank  line  and  the 
                  remainder of the  text is  scrolled down and the
                  lowest line is lost.
          <ESC>Yrowcolumn,  move  cursor  to  any   place  of  the 
                  screen.  The row  and column are  calculated  in 
                  this way, take the  row or column number and add
                  32, then  find  the  character in ASCII decimal.
                  For example,  <ESC>Y+A  moves cursor to 11th row 
                  33th column since '+' in ASCII is decimal 43 and 
                  'A' is 65. Note that the upper left  corner(home 
                  position) is 0,0 and  the  other corner  is  23,  
                  79  in  the meduim resolution.
          <ESC>j  Save cursor, to be restored by the next function
          <ESC>k  Restore cursor,  move cursor to the position the 
                  last <ESC>j is called.
                  
       B. Erase functions
          The following functions perform erasing screen functions.
     
          <ESC>E  Clear whole screen, and move cursor home (0, 0).
          <ESC>J  Clear below  cursor,  from the cursor to the end
                  of the screen and the cursor position unchanged.
          <ESC>K  Clear to end of line, including the character at
                  the current position but cursor position is  not 
                  changed.
          <ESC>M  Delete line,  and move  the remainder of text up
                  one line.
          <ESC>d  Clear  screen to the cursor, from  home position
                  to current position, a complementary  of <ESC>J.
          <ESC>l  Clear line, same as <ESC>M except the  remainder
                  is not scrolled up.
          <ESC>o  Clear line from start, from the beginning of the
                  line to current position, a complementary of
                  <ESC>K.
     
       C. Display attributes
          The following fuctions change display attributes.

          <ESC>e  Cursor on, turn on the flashing cursor.
          <ESC>f  Cursor off, turn off the flashing cursor.
          <ESC>p  Reverse on, the foreground and background colors
                  are changed. For example, the status line on the 
                  bottom of Flash! is in reversed video.
          <ESC>q  Reverse off, return back to normal video.
          <ESC>v  Wrap on, output beyond the edge of screen will
                  be wrapped.
          <ESC>w  Wrap off.
          <ESC>bColor_number  Foreground color, color for character 
                  display. In medium resolution, 0-white, 1-red, 
                  2-green, and 3-black.
          <ESC>cColor_number  Background color. Be careful not to
                  set the foreground color the same as background.
          
     
           Code   Function           DEC's VT52       Vidtex
     -----------------------------------------------------------
          <ESC>A  Cursor Up              *               *
          <ESC>B  Cursor Down            *               *
          <ESC>C  Cursor Right           *               *
          <ESC>D  Cursor Left            *               *
          <ESC>H  Cursor Home            *               * 
          <ESC>I  Reverse Line Feed      *
          <ESC>L  Insert  Line           
          <ESC>Y row column              *               *
          <ESC>j  Save cursor            *
          <ESC>k  Restore cursor         *
     
          <ESC>E  Clear screen           *
          <ESC>J  Clear below cursor     *               *
          <ESC>K  Clear end of line      *               *
          <ESC>M  Delete line
          <ESC>d  Clear screen to the cursor
          <ESC>l  Clear line
          <ESC>o  Clear line from start

          <ESC>e  Cursor on              *               *
          <ESC>f  Cursor off             *               *
          <ESC>p  Reverse on             *
          <ESC>q  Reverse off            *
          <ESC>v  Wrap on
          <ESC>w  Wrap off.
          <ESC>b color_number Foreground color
          <ESC>c color_number Background color