## Display Device Driver Reference for OS/2

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### Testing Video Device Drivers Using AutoCAD Release 10 c-14

AutoCAD is a general purpose Computer Aided Design (CAD) program. Use AutoCAD to create a variety of two-dimensional drawings and three- dimensional models. Drawings prepared with AutoCAD are stored in data files that contain information about locations, sizes, colors, and attributes of objects you draw. These data files can be easily retrieved for viewing, editing, or plotting.

AutoCAD provides simple commands (such as "circle" and "line") to let you construct your drawing. The program also prompts you for information it needs to place an object at a specific location in the drawing. Commands are also provided to edit drawings and to view objects from different perspectives.

The OS/2 version of AutoCAD is designed to work with the window-based graphics interface of the Presentation Manager.

System Requirements

OS/2 (version 1.1 or later with Presentation Manager)

At least 4 megabytes of memory (6MB is recommended)

An Intel** 80387 Numeric Coprocessor.

A mouse is strongly recommended (but not required).

Conventions

Throughout this scenario, keys to be entered are denoted by brackets ([ ]) , such as [F9], [Ctrl+PgDn].

Cursor keys are denoted by [Up], [Down], [Left] and [Right].

A string of characters is denoted by quotations (" "), such as "CD\FP" and "C: \FIRST".

Any typographical mistakes can be fixed with the Backspace key.

If the instructions state to select an item, move the cursor to that item and press [Enter].

When asked to select an item such as menu | item, click on each item in left to right order.

Note: If you do not have AutoCAD installed, refer to your AutoCAD Installation Manual for instructions.

Starting and Testing AutoCAD

1.Reboot your system and select OS/2 Full Screen when the Group-Main menu is displayed.

2.At the OS/2 prompt, change to the drive where AutoCAD is, and type "CD\ ACAD".

3.Press [Enter].

4.Type "ACAD" and press [Enter] to load AutoCAD. The AutoCAD drawing screen is displayed.

5.Select File from the action bar.

6.Select Open from the pull-down menu.

7.Select COLORWH.DWG from the list of files in the right column of the dialog box.

8.Press [OK] The AutoCAD Color Wheel should be displayed.

9.Select File from the action bar, and select Close from the pull-down menu.

10.Select DISCARD from the dialog box.

Viewing Existing Drawings

Using ZOOM

1.Select File from the action bar, then select Open... from the pull-down menu. The Select drawing file dialog box is displayed.

2.Select the file AIRPLANE.DWG. A 3D wireframe model of an airplane is displayed in plane view (as if you are looking from above, straight down on the airplane).

3.At the Command: prompt, type "ZOOM" and press [Enter].

4.At the All/Center... prompt, type "W" and press [Enter]. This will let you enclose the area to be zoomed in a window.

5.At the First Corner: prompt, move the crosshairs to the upper left of the airplane's tail. The coordinates displayed on the status line above the drawing should be approximately 13,23.

6.Press the left button of the mouse to select this point.

7.At the Other Corner: prompt, move the cursor until the box encloses a portion of the airplane's tail. The coordinates displayed on the status line above the drawing should be approximately 22,18.

8.Press the left button of the mouse to select this point. The screen is redrawn with only the zoomed portion of the tail of the airplane shown.

9.At the Command: prompt, type "ZOOM" and press [Enter].

10.At the All/Center... prompt, type "P" to display the previous view of the airplane and press [Enter]. The original view of the airplane is displayed.

Using VPOINT

1.At the Command: prompt (with the airplane still displayed), type " VPOINT" and press [Enter].

2.At the Rotate... prompt, type "1,-1,1" and press [Enter]. These values represent x, y and z coordinates. The airplane is redrawn with the nose pointing in a southwest direction.

3.At the Command: prompt, type "VPOINT" and press [Enter].

4.At Rotate... prompt, type "0,1,1" and press [Enter]. The airplane is redrawn with the nose pointing north.

5.At the Command: prompt, type "VPOINT" and press [Enter].

6.At the Rotate... prompt, type "R" to select rotate.

7.At the Enter angle... prompt, type "30" and press [Enter].

8.At the next Enter angle... prompt, type "50" and press [Enter]. The airplane is redrawn with the nose pointing in a northwest direction.

9.At the Command: prompt, type "QUIT" and press [Enter].

10.Type "Y" to discard changes. The AutoCAD drawing screen is blanked.

Verify that video corruption does not occur in all operations.

Using DVIEW

1.Select File from the action bar of the AutoCAD drawing screen, and select Open... from the pull-down menu.

2.Select the file HOUSE.DRW from the file list in the Select drawing file dialog box. A hip-roofed house is displayed.

3.At the Command: prompt, type "DVIEW" and press [Enter].

4.At the Select objects... prompt, select a point below and to the left of the lower left-hand corner of the roof edge. The coordinates on the status line above the drawing should be approximately 27'-0",25'-0".

5.At the next Select objects... prompt, select a point above and to right of the upper right-hand corner of the roof edge. The coordinates on the status line above the drawing should be approximately 80'-0",64'-0".

6.At the next Select Objects... prompt, press [Enter].

7.At the Camera/Target... prompt, type "PO" to select target points.

8.At the Enter target point... prompt, select a point at the middle of the house. The coordinates on the status line above the drawing should be approximately 55'-7", 41'-11".

9.At the Enter camera point... prompt, type "@35' < 270" to indicate a distance of 35 feet at a 270 degree rotation and press [Enter].

10.At the Camera/Target ... prompt, press [Enter]. The house is redrawn as if you were facing the front of the house with the door directly in front of you and the chimney at the right edge of the house.

Using VPorts

1.At the Command: prompt, type "VPORTS" and press [Enter].

2.At the Save/Restore... prompt, type "4" and press [Enter]. The screen is redrawn, divided into separate viewports containing the same drawing.

3.At the Command: prompt, type "QUIT" and press [Enter].

4.At the Really want to quit.. prompt, type "Y" and press [Enter].

Preparing a 2-D Drawing

Note: Making Corrections: In the sections that follow, you will create a 2 -dimensional drawing and add dimensions to it. If you make an error while entering information for a command, you can cancel that command by pressing [Ctrl+C]. If you have completed a command and you wish to undo it, type "U" .

Drawing a Border

1.On the AutoCAD drawing screen, select Utilities from the action bar.

2.Select File Utilities from the File pull-down menu. The File Utility Menu is displayed.

3.At the Enter selection... prompt, type "2" and press [Enter].

4.At the Enter file search specification... prompt, type "*.DWG" and press [Enter]. If the name D1.DWG appears on the list, go to step 5. Otherwise, skip step 5 and go to step 6.

5.At the Enter selection prompt, type "3" and press [Enter].

6.At the Enter file deletion specification... prompt, type "D1.DWG" and press [Enter]. The file is now deleted.

7.Press [Enter] and the File Utility Menu is redisplayed.

8.At the Enter selection prompt, press [Enter] to take the default.

9.On the AutoCAD drawing screen, select File from the action bar, and then select New from the pull-down menu. The Create drawing file dialog box is displayed.

10.At the Current file line, backspace over the name (if any) that is in the Current file field and type "D1" ; then press [Enter].

11.At the Command: prompt, type "UNITS" and press [Enter]. The AutoCAD Text -D1 screen is displayed.

12.At the Enter choice... prompt, press [Enter] to accept the default ( decimal).

13.At the Number of digit... prompt, type "1" and press [Enter].

14.Press [Ctrl+Break] to skip the rest of the questions. The AutoCAD-D1 drawing screen is redisplayed.

15.At the Command: prompt, type "SNAP" and press [Enter].

16.At the Snap spacing... prompt, type "0.5" and press [Enter].

17.At the Command: prompt, type "GRID" and press [Enter] to set the grid spacing.

18.At the Grid spacing... prompt, type "S" and press [Enter] to set the grid spacing to the snap spacing. Now when you move the cursor, it will snap between points on the grid.

19.At the Command: prompt, type "UCSICON" and press [Enter].

20.Then type "OFF" and press [Enter] to remove the icon at the far left of your drawing.

21.At the Command: prompt, type "ORTHO" and press [Enter].

22.At the ON/OFF prompt, type "ON" and press [Enter.].

23.Press [F3] to turn on the coordinates on the status line.

24.At the Command: prompt, type "PLINE" and press [Enter].

25.At the From point: prompt, move the cursor until the coordinates on the status line read 0.5,0.5 and select that point.

26.At the Arc/Close.. prompt, type "W" to set the width of the line and press [Enter].

27.At the Starting width... prompt, type "0.03" and press [Enter]. Press [ Enter] on the Ending width prompt.

28.At the Arc/Close... prompt, move the cursor to the right until the coordinates on the status line above the drawing read 11.0<0 and select that point.

29.At the next Arc/Close... prompt, move the cursor straight up until the coordinates on the status line above the drawing read 8.0<90, and select that point.

30.At the next Arc/Close... prompt, move the cursor horizontally to the left until the coordinates on the status line read 11.0<180, and select that point.

31.At the next Arc/Close... prompt, type "C" and press [Enter]. The rectangular border is now complete.

Drawing Rectangles and Squares

1.At the Command: prompt, type "LINE" and press [Enter].

2.At the From point: prompt, move the cursor to the lower left hand of the rectangular box until the coordinates read 2.5, 2.0, and select that point.

3.At the To point: prompt, move the cursor to the right until coordinates read 3.0 < 0 and select that point.

4.Execute different OS/2 applications to test the OS/2 video device driver .

5.At the next To point: prompt, move the cursor up until the coordinates read 0.5<90 and select that point.

6.At the next To point: prompt, move the cursor to the left until the coordinates read 2.5<180 and select that point.

7.At the next To point: prompt, move the cursor upward until the coordinates read 1.5<90 and select that point.

8.At the next To point: prompt, move the cursor to the left until the coordinates read 0.5<180 and select that point.

9.At the next To point: prompt, type "C" and press [Enter] to close the outline. The front view of the drawing is complete.

10.To start drawing the right view, at the Command: prompt, type "POLYGON" and press [Enter].

11.At the Number of sides: prompt, type "4" and press [Enter].

12.At the Edge/Center... prompt, type "E" and press [Enter].

13.At the First endpoint.. prompt, move the cursor along the lower edge of the right view you just drew until the coordinates read 7.5,2.0 and select that point.

14.At the Second endpoint... prompt, move the cursor until the coordinates read 9.5,2.0 and select that point. The square part of the right view is completed.

15.At the Command: prompt, press [Enter] to use the polygon command again.

16.At the Polygon Number of sides... prompt, type "4" and press [Enter].

17.At the Edge/Center.. prompt, type "E" and press [Enter].

18.At the First endpoint... point prompt, move the cursor to the upper left until the coordinates read 2.5,5.0 and select that point.

19.At the Second endpoint... point prompt, move the cursor to the right until the coordinates read 4.5,5.0 and select that point. The figure is completed.

Using the Explode Command

1.At the Command: prompt, type "SNAP" and press [Enter].

2.At the Snap spacing... prompt, type "OFF" and press [Enter].

3.At the Command: prompt, type "ZOOM" and press [Enter].

4.At the All/Center... prompt, type "W" and press [Enter].

5.At the First corner... prompt, move the cursor to just below and to the lower left corner of the top view until coordinates read 2.0,4.5 and select that point.

6.At the Other corner... prompt, move the cursor to the upper right until the coordinates read approximately 5.0,7.5 and select that point. The screen is redrawn with the square enlarged.

7.At the Command: prompt, type "EXPLODE" and press [Enter].

8.At the Select block... prompt, use the cursor to move the tiny selection box to any side of the square and select the side. The square is now " exploded" so you can erase individual parts of the square without erasing all of it.

9.At the Command: prompt, type "ERASE" and press [Enter].

10.At the Select objects... prompt, move the cursor to the right side of the square and select it. The side becomes a dotted line.

11.At the Select objects... prompt, press [Enter] and the right edge is erased.

12.At the Command: prompt, type "SNAP" and press [Enter].

13.At the Snap spacing... prompt, type "ON" and press [Enter].

14.At the Command: prompt, type "LINE" and press [Enter].

15.At the From point... prompt, move the cursor to the lower left corner of the top view until the coordinates read 3.0,5.0 and select that point.

16.At the To point... prompt, move the cursor up until the coordinates read 2.0<90 and select that point.

17.Press [Enter].

18.At the Command: prompt, press [Enter] to use the line command again.

19.At the Line From... prompt, move the cursor downward until the coordinates read 3.0,6.5 and select that point.

20.At the To point... prompt, move the mouse to the left until the coordinates read 0.5<180 and select that point.

21.Press [Enter].

22.At the Command: prompt, press [Enter] to use the line command again.

23.At the Line From point... prompt, move the cursor down the left edge of the figure until the coordinates read 2.5,5.5 and select that point.

24.At the To point... prompt, move the cursor to the right until the coordinates read 0.5<0 and select that point.

25.Press [Enter].

26.At the Command: prompt, type "ZOOM" and press the spacebar.

27.At the All/Center... prompt, type "D" and press [Enter]. The entire 3- part drawing will be displayed with a large selection box with an X at the center.

28.Move the cursor to the lower right until the box with the X is centered over the right view square. When the coordinates read 8.5,3.0, select this point.

29.Press [Enter]. The screen is redrawn to display an enlarged view of the right view square.

30.At the Command: prompt, type "EXPLODE" and press [Enter].

31.At the Select block... prompt, move the cursor to any side of the square and select that side.

32.At the Command: prompt, type "LINE" and press [Enter].

33.At the From point... prompt, move the cursor toward the lower left corner of the right view until the coordinates read 7.5,2.5, and select that point.

34.At the To point... prompt, move the cursor to the right until the coordinates read 2.0<0, and select that point.

35.Press [Enter] to end that line command.

36.At the Command: prompt, press [Enter] to use the line command again.

37.At the Line from point: prompt, move the cursor toward the upper left corner of the figure until the coordinates read 8.0,4.0, and select that point.

38.At the To point: prompt, move the cursor down one grid point until the coordinates read 0.5<270, and select that point.

39.Press [Enter] to end the line command.

40.At the Command: prompt, press [Enter] to use the line command again.

41.At the Line from point: prompt, move the cursor across the top of the figure until the coordinates read 9.0,4.0, and select that point.

42.At the To point: prompt, move the cursor down one grid point until the coordinates read 0.5<270, and select that point.

43.Press [Enter] to end the line command.

44.At the Command: prompt, type "ZOOM" and press the spacebar.

45.At the All/Center... prompt, type "A" and press [Enter].

Verify that video corruption does not occur in all operations.

Drawing Arcs and Circles

1.At the Command: prompt, type "ELLIPSE" and press [Enter].

2.At the Axis endpoint 1 prompt, move the cursor toward the lower-right edge of the top view until the coordinates read 4.5,5.5, and select that point.

3.At the Axis endpoint 2 prompt, move the cursor up two grid points until the coordinates read 1.0<90, and select that point. You will see the outline of a small circle.

4.At the Other axis.. prompt, select the same point as in the preceding step.

5.At the Command: prompt, type "ARC" and press [Enter].

6.At the Center/start point prompt, type "C" and press [Enter].

7.At the Center: prompt, move the cursor to the center of the circle until the coordinates read 4.5,6.0, and select that point.

8.At the Start point: prompt, move the cursor until the coordinates read 4 .5,5.0, and select that point.

9.At the Angle/Length... prompt, move the cursor upward through the circle until the coordinates read 1.0<90 and select that point. The arc is completed.

10.At the Command: prompt, press [Enter] to use the arc command again.

11.At the Arc: Center/Start... prompt, move the cursor toward the right view until the coordinates read 8.0,3.5 and select that point.

12.At the Center/End... prompt, type "C" and press [Enter].

13.At the Center: prompt, move the cursor to the right until the coordinates read 8.5,3.5, and select that point.

14.At the Angle/Length... prompt, move the cursor to the right until the coordinates read 0.5<0 and select that point. The arc is completed.

15.At the Command: prompt. type "ZOOM" and press spacebar.

16.At the All/Center... prompt, type "W" and press [Enter].

17.At the First corner... prompt, move the cursor toward the lower right corner of the right view until the coordinates read 7.0,1.5, and select that point.

18.At the Other corner... prompt, move the cursor until the coordinates read 10.0,4.5, and select that point. The screen is redrawn with the figure enlarged.

19.At the Command: prompt, type "ARC" and press [Enter].

20.At the Center/Start.. prompt, type "C" and press [Enter].

21.At the Center: prompt, move the cursor until the coordinates read 8.0,3. 5, and select that point.

22.At the Start point: prompt, move the cursor until the coordinates read 8 .0,4.0 and select that point.

23.At the Angle/Length... prompt, move the cursor until the coordinates read 0.5<180 and select that point. The arc is completed.

24.At the Command: prompt, press [Enter.] to use the arc command again.

25.At the ARC Center/Start... prompt, type "C" and press [Enter].

26.At the Center: prompt, move the cursor to the right until the coordinates read 9.0,3.5 and select that point.

27.At the Start point: prompt, move the cursor until the coordinates read 9 .5,3.5, and select that point.

28.At the Angle/Length... prompt, move the cursor up and to the left until the coordinates read 0.5<90, and select that point. The arc is completed.

29.At the Command: prompt, type "SNAP" and press [Enter].

30.At the Snap spacing... prompt, type "OFF" and press[Enter].

31.At the Command: prompt, type "ERASE" and press [Enter].

32.At the Select objects: prompt, move the cursor to the middle of the top line ( at approximately 8.5,4.0) select that line. The line becomes dotted.

33.At the next Select objects: prompt, press [Enter] and the line is erased .

34.At the Command: prompt, type "TRIM" and press [Enter].

35.At the Select cutting... Select objects... prompt, type "l" (to select the last item drawn) and press [Enter].

36.At the Select objects: prompt, move the cursor to the upper left corner (at approximately 7.7,3.8), and select that arc.

37.Press [Enter] to complete selection of the boundaries for the trim.

38.At the Select object to trim: prompt, move the cursor to the top of the line at the upper right edge of the figure (at approximately 9.5,4.0) and select that point. The line is now trimmed back to the arc.

39.At the next Select object to trim: prompt, move the cursor to the top of the line at the upper left edge of the figure (at approximately 7.5,4.0) and select that point. That line is now trimmed back to the arc.

40.At the next Select object to trim: prompt, press [Enter] to end the trim command.

41.At the Command: prompt, type "ZOOM" and press the spacebar.

42.At the All/Center.. prompt, type "A" and press [Enter]. The figure is redrawn with all three views shown.

Using Layers and Hidden Lines

1.At the Command: prompt, type "LAYER" and press [Enter].

2.At the ?/Make... prompt, type "M" and press [Enter].

3.At the New current layer: prompt, type "HIDDEN" and press [Enter].

4.At the ?/Make... prompt, type "l" ( for line type ) and press [Enter].

5.At the Linetype (or ?)... prompt, type "OHIDDEN" and press [Enter] to select the hidden line type.

6.At the Layer name(s)... prompt, press [Enter] to set the line type hidden.

7.At the ?/Make... prompt, press [Enter] to end the layer command.

8.At the Command: prompt, type "SNAP" and press [Enter].

9.At the Snap spacing... prompt, type "ON" and press [Enter].

10.At the Command: prompt, type "LINE" and press [Enter].

11.At the From point: prompt, move the cursor to the lower left corner of the right view until the coordinates read 8.0,2.0, and select that point.

12.At the To point: prompt, move the cursor up until the coordinates read 0 .5<90, and select that point.

13.At the next To point: prompt, press [Enter] to end the line command.

14.At the Command: prompt, press [Enter] to use the line command again.

15.At the LINE from point: prompt, move cursor to the right until the coordinates read 9.0,2.5,and select that point.

16.At the To point: prompt, move the cursor down until the coordinates read 0.5<270, and select that point.

17.At the next To point: prompt, press [Enter] to end the line command.

18.At the Command prompt, press [Enter] to use the line command again.

19.At the LINE from point: prompt, move the cursor toward the lower right edge of the front view until the coordinates read 5.0,2.0, and select that point.

20.At the To point: prompt, move the cursor up until the coordinates read 0 .5<90, and select that point.

21.At the next To point: prompt, press [Enter] to end the line command.

22.At the Command: prompt, press [Enter] to use the line command again.

23.At the Line from point: prompt, move the cursor to the left until the coordinates read 4.0,2.5, and select that point.

24.At the To point: prompt, move the cursor down until the coordinates read 0.5 < 270, and select that point.

25.At the next To point: prompt, press [Enter] to end the line command.

26.At the Command: prompt, press [Enter] to use the line command again.

27.At the LINE from point: prompt, move the cursor until the coordinates read 2.5,3.0, and select that point.

28.At the To point: prompt, move the cursor until the coordinates read 0.5< 0, and select that point.

29.At the next To point: prompt, press [Enter] to end the line command.

30.At the Command: prompt, type "SNAP" and press [Enter].

31.At the Snap spacing... prompt, type "OFF" and press [Enter].

32.At the Command: prompt, type "TSCALE" and press [Enter].

33.At the New scale... prompt, type "0.6" and press [Enter].

34.At the Command: prompt, type "LAYER" and press [Enter].

35.At the ?/Make... prompt, type "S" and press [Enter].

36.At the New current layer... prompt, type "0" and press [Enter].

37.At the ?/Make... prompt, press [Enter] to end the layer command. The layer shown on the status line should now be 0 instead of HIDDEN.

38.Select the AutoCAD pull-down menu from the title bar icon, and select Close from the pull-down menu.

39.Select Save from the QUIT AutoCAD window.

Adding Dimensions to a Drawing

1.From the Group-Main menu, select AutoCAD.

2.From the AutoCAD drawing screen, select File from the action bar, and then select Open from the pull-down menu.

3.From the Select drawing file dialog box, select D1.DWG.

4.At the Command: prompt, type "LAYER" and press [Enter].

5.At the ?/Make... prompt, type "M" and press [Enter].

6.At the New current layer: prompt, type "DIM" and press [Enter].

7.At the ?/Make... prompt, press [Enter]. The word DIM is now next to Layer on the status line above the drawing.

8.At the Command: prompt, type "ZOOM" and press [Enter].

9.At the All/Center... prompt, type "W" and press [Enter].

10.At the First corner: prompt, move the cursor toward the left edge of the drawing until the coordinates read 1.2, 5.7, and select that point.

11.At the Other corner: prompt, move the cursor toward the right until the coordinates read 7.3, 1.5, and select that point. The screen is redrawn with an enlarged view of the front view and part of the top view.

12.At the Command: prompt, type "DIM" and press [Enter].

13.At the Dim: prompt, type "VER" and press [Enter].

14.At the First extension... prompt, press [Enter].

15.At the Select line... prompt, move the cursor toward the left edge of the front view until the coordinates read 2.5, 2.5, and select that point.

16.At the Dimension line location: prompt, move the cursor until the coordinates read 1.8, 3.0, and select that point.

17.At the Dimension text <2.0>... prompt, press [Enter] to accept the value of 2.0 for the dimension. The vertical dimension command is now completed.

18.At the Dim: prompt, type "HOR" and press [Enter].

19.At the First extension... prompt, press [Enter].

20.At the Select line... prompt, move the cursor until the coordinates read 2.7, 4.0, and select that point.

21.At the Dimension line... prompt, move the cursor until the coordinates read 2.7, 4.3, and select that point.

22.At the Dimension text <0.5>... prompt, press [Enter] to accept the value of 0.5 for the dimension.

23.At the Dim: prompt, type "VER" and press [Enter].

24.At the First extension... prompt, press [Enter].

25.At the Select line... prompt, move the cursor toward the right edge of the front view until the coordinates read 5.5, 2.2, and select that point.

26.At the Dimension line... prompt, move the cursor until the coordinates read 6.0, 2.7, and select that point.

27.At the Dimension text <0.5>... prompt, press [Enter] to accept the value of 0.5 for dimension.

28.At the Dim: prompt, press [Ctrl+C] to leave the Dim subcommands.

Verify that video corruption does not occur in all operations.

Adding Center Lines

1.At the Command: prompt, type "SNAP" and press [Enter].

2.At the Snap spacing... prompt, type "ON" and press [Enter].

3.At the Command: prompt, type "GRID" and press [Enter].

4.At the Grid spacing... prompt, type "S" and press [Enter].

5.At the Command: prompt, type "LAYER" and press [Enter].

6.At the ?/Make... prompt, type "M" and press [Enter].

7.At the New current layer... prompt, type "CENTER" and press [Enter].

8.At the ?/Make... prompt, type "l" and press [Enter].

9.At the Linetype... prompt, type "CENTER" and press [Enter].

10.At the Layer Names(s)... prompt, press [Enter].

11.At the ?/Make... prompt, press [Enter]. The status line above the drawing now shows CENTER following Layer.

12.At the Command: prompt, type "SNAP" and press [Enter].

13.At the Snap spacing... prompt, type "OFF" and press [Enter].

14.At the Command: prompt, type "LINE" and press [Enter].

15.At the From point: prompt, move the cursor until the coordinates read 4. 5,3.0, and select that point.

16.At the To point: prompt, move the cursor until the coordinates read 1.4< 270, and select that point.

17.At the next To point: prompt, press [Enter] to end the line command.

18.At the Command: prompt, press [Enter] to use the line command again.

19.At the LINE from point: prompt, move the cursor until the coordinates read 3.5,3.5, and select that point.

20.At the To point: prompt, move the cursor until the coordinates read 1.4< 180, and select that point.

21.At the next To point: prompt, press [Enter] to end the line command.

22.Select Settings from the action bar to change back to DM layer. Then select Modify layer from the pull-down menu.

23.When the Modify layer dialog box is displayed, select the Current box to the left of DIM, and then select OK.

24.The word DIM is now displayed next to layer on the status line above the drawing.

25.At the Command: prompt, type "ZOOM" and press [Enter].

26.At the All/Center... prompt, type "D" and press [Enter]. The screen is redrawn showing all three views.

27.Move the cursor until the box with X is positioned over the top view ( the coordinates read approximately 4.5,6.0) and press [Enter]. The screen is redrawn showing the top view enlarged.

28.At the Command: prompt, type "DIM" and press [Enter].

29.At the Dim: prompt, type "DIMCEN" and press [Enter]. The current value displayed is <0.1>.

30.At the New value: prompt, type "-0.1" and press [Enter].

31.At the Dim: prompt, press [Ctrl+C].

32.At the Command: prompt, type "ORTHO" and press [Enter].

33.At the ONOFF prompt, type "OFF" and press [Enter].

34.At the Command: prompt, type "DIM" and press [Enter].

35.At the Dim: prompt, type "RAD" and press [Enter].

36.At the Select arc... prompt, move the cursor toward the upper right edge of the figure until the coordinates read approximately 5.2,6.7, and select that point.

37.At the Dimension text <1.0>...prompt, type "1.0R" and press [Enter].

38.At the Dim: prompt, type "DIA" and press [Enter].

39.At the Select arc... prompt, move the cursor toward the lower right edge of the circle until the coordinates read approximately 4.9,5.7, and select that point.

40.At the Dimension text <1.0>: prompt, press [Enter] to accept the value 1 .0 for the diameter.

41.At the [Enter] leader... prompt, type "0.9" and press [Enter].

42.At the Dim: prompt, type "HOR" and press [Enter].

43.At the First extention... prompt, press [Enter].

44.At the Select line prompt, move the cursor until the coordinates read 3. 5,7.0, and select that point.

45.At the Dimension line... prompt, move the cursor until the coordinates read 3.5,7.5, and select that point.

46.At the Dimension text <2.0>: prompt, press [Enter] to accept the value of 2.0.

47.Press [Ctrl+C] to end the command.

48.At the Command: prompt, type "ZOOM" and press [Enter].

49.At the All/Center... prompt, type "D" and press [Enter]. The screen is redrawn to show all three views of the drawing.

50.Move the cursor toward the right of the drawing until the coordinates read approximately 8.5,3.5, and press [Enter]. The screen is redrawn to show an enlarged view of the right view.

51.At the Command: prompt, type "DIM" and press [Enter].

52.At the Dim: prompt, type "CENTER" and press [Enter].

53.At the Select arc... prompt, move the cursor until the coordinates read 8.9,3.2, and select that point.

54.At the Dim: prompt, type "HOR" and press [Enter].

55.At the First extention line... prompt, type "INT" and press [Enter].

56.At the of: prompt, move the cursor until the coordinates read 8.0,4.0, and select that point.

57.At the Second extension... prompt, type "INT" and press [Enter].

58.At the Of: prompt, move the cursor until the coordinates read 9.0,4.0, and select that point.

59.At the Dimension line location: prompt, move the cursor to 8.5,4.2, and select that point.

60.At the Dimension text <1.0>: prompt, press [Enter] to accept the value 1 .0.

61.If Ortho is displayed on the status line, set Ortho off by typing "ORTHO " at the Command: prompt; then press [Enter].

62.Type "OFF" and press [Enter] at the ON/OFF prompt.

63.At the Dim: prompt, type "LEA" and press [Enter].

64.At the Leader start: prompt, type "NEA" and press [Enter].

65.At the To: prompt, move the cursor until the coordinates read 7.7,3.8 and select that point.

66.At the To point: prompt, move the cursor until the coordinates read 0.5< 130, and select that point.

67.At the next To point: prompt, press [Enter].

68.At the Dimension text <>... prompt, type "0.5R" and press [Enter].

69.Press [Ctrl+C] to end the Dim command.

70.At the Command: prompt, type "ORTHO" and press [Enter].

71.At the ON/OFF prompt, type "ON" and press [Enter].

72.Select Settings from the action bar to change to the Center layer. Then select Modify Layer from the pull-down menu. The Modify Layer dialog box is displayed.

73.Select the Current box to the left of CENTER and then select OK. When the screen is redrawn, the word Center is displayed next to Layer on the status line above the drawing.

74.At the Command: prompt, type "LINE" and press [Enter].

75.At the From point: prompt, type "END" and press [Enter].

76.At the Of: prompt, move the cursor until the coordinates read 8.5,2.9, and select that point.

77.At the To point: prompt, move the cursor until the coordinates read 1.2< 270 and select that point.

78.At the next To point: prompt, press [Enter] to complete the line command .

79.Select Settings from the action bar. Then select Modify Layer from the pull-down menu.

80.Select the Current box to the left of 0 and then select OK. When the screen is redrawn, 0 is displayed to the right of Layer on the status line above the drawing.

81.At the Command: prompt, type "ZOOM" and press [Enter].

82.At the All/Center... prompt, type "A" and press [Enter]. When the screen is redrawn you will see all three views of the bracket.

83.At the Command: prompt, type "END" to save the drawing.

84.Pull down the AutoCAD menu from the title bar icon and select Close from the pull-down.

85.On the Group-main menu, select OS/2 Full screen.

86.At the OS/2 prompt, type "CD \ACAD" to change to the ACAD directory. Type "ERASE D1.DWG" and press [Enter].

Verify that video corruption does not occur in all operations.