Browse Prior Art Database

Interactive Cursor Draw for Wheel Typing Units

IP.com Disclosure Number: IPCOM000099413D
Original Publication Date: 1990-Jan-01
Included in the Prior Art Database: 2005-Mar-14
Document File: 2 page(s) / 75K

Publishing Venue

IBM

Related People

Long Jr, TH: AUTHOR [+2]

Abstract

Disclosed is an invention which allows a wheel typing unit user to draw and print graphic horizontal and vertical lines. The graphic horizontal and vertical lines are also removable from the paper medium via correctable lift-off tapes.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Interactive Cursor Draw for Wheel Typing Units

       Disclosed is an invention which allows a wheel typing unit
user to draw and print graphic horizontal and vertical lines.  The
graphic horizontal and vertical lines are also removable from the
paper medium via correctable lift-off tapes.

      The interactive cursor draw function is activated via a control
key input sequence from the typewriter keyboard. The up/down/left/
right cursor keys are redefined in function from the typical word
processing or typing functions.

      When the user enters "Cursor Draw" mode, the cursor keys are
used to interactively draw graphics using the vertical bar and
underscore graphics.  Depending upon the preceding character, the
machine determines which combinations of the vertical bar character,
underscore character, and paper movement to construct the following:
    a.   Horizontal lines
    b.   Vertical lines
    c.   Four corners
    Horizontal Lines:  Horizontal lines are constructed using the
underscore graphic on the ASCII wheel.  For boxes surrounding lines
of text, the horizontal box line should be placed near the middle of
the character box.  Therefore, the carrier is moved to that location
when the first horizontal motion key is pressed and remains there
until a vertical motion key is encountered.

      Vertical Lines:  The vertical bar on the ASCII wheel is a
broken bar graphic.  In order to produce a solid vertical line, the
vertical line is constructed by printing the broken bar graphic
without escaping, indexing the carrier slightly and striking the
graphic again.
    Drawing the Box
    Northwest Corner:  When a down arrow is encountered following
left horizontal motion, the corner is constructed as follows:
    a.   Move carrier to the right 1/2 the character width
    b.   Print the underscore graphic with no escapement
    c.   Move the carrier to...