bryan@ihnet.UUCP (b. k. delaney) (02/03/86)
Following are some Procedures to fully use the vt100 terminal
it is uuencoded because of non printing characters.
Following vt100grp.i is the documentation file
------Cut Here and also below-------------------------------------------
begin 777 vt100grp.i
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end
---------------------------Cut here for documentation----------------
vt100grp.i:
Vt100grp.i is a file of Graphics procedures for the VT100 terminal.
To use these procedures, put the following line in the procedure
section of your Pascal Program.
#include "/Full Path/vt100grp.i"
When you Compile your Pascal program you will get a few warning
messages about procedures that are never used. You may ignore
these messages. Obviously not every graphics procedure is going
to be used by all programs.
Following is a brief description on how to use the procedures.
For more Information you may wish to consult the VT100 users guide.
CursorBack(x :integer);
Move Cursor Back "x" Columns. If you try to move the Cursor back
past Column 1 the Cursor stays at Column 1.
CursorDown(x :integer);
Move Cursor Down "x" Rows. If you try to move the Cursor Down past
row 24 the Cursor stays at row 24.
CursorUp(x :integer);
Move Cursor up "x" Rows. If you try to move the Cursor Up past
row 1 the Cursor stays at row 1.
CursorForward(x :integer);
Move Cursor forward "x" Columns. If you try to move the Cursor Foward
pas Column 80/132 the Cursor stays at column 80/132.
ClearHome;
Clears Screen then move cursor to Row 1 Column 1.
Procedure Clear(x :integer);
Erases all or part of the screen depending on the value of x.
If X = 0 then erase from the active position to the end of the screen.
If X = 1 then erase from the start of the screen to the active position.
If X = 2 then erase the whole display.
In all cases the position of the cursor is not changed.
Procedure LineClear(x :integer);
Erases all or part of the line depending on the value of x.
If X = 0 then erase from the active position to the end of the line.
If X = 1 then erase from the start of the line to the active position.
If X = 2 then erase the whole line.
In all cases the position of the cursor is not changed.
Procedure Inverse;
Once invoked all characters sent to the screen are shown as black
on white (Inverse video). This attribute remanes in effect until
the procedure Normal is invoked.
Procedure Bold;
Same as Inverse except characters are bold instead of inverse.
Procedure UnderScore;
Same as Inverse except characters are underlined instead of inverse.
Procedure Blink;
Same as Inverse except characters are Blinking instead of inverse.
Procedure Normal;
Once invoked all characters sent to the screen are shown
white on black non blinking and not underlined or bold.
Procedure Double;
All characters on the current line are printed double wide.
This procedure must be invoked for every line that is to be
printed double wide.
Procedures DoubleHighUpper; and DoubleHighLower;
These procedures cause the line containing the active position to
become the top or bottom half of a double-high double-wide line.
These procedures must be used in pairs on adjacent lines and the
same character output must be sent to both lines.
Example:
DoubleHighUpper;
write('This is a double-high double-wide line');
DoubleHighLower;
write('This is a double-high double-wide line');
Procedure GraphicOn;
Turns on the vt100 Graphic character set.
Procedure GraphicOff;
turns off the vt100 Graphic character set.
Procedure Position(x,y :integer);
Place the cursor at column "x", row "y".
Procedure Hline(x,y,length,scanline :integer);
Draws a horizontal line from Position(x,y) "length" characters long
on vertical scanline "scanline".
Procedure Line(scanline :integer);
The line on which the cursor is on becomes a Horizontal Line
on vertical scanline "scanline".
Procedure Vline(x,y,length :integer);
This procedure draws a vertical line starting from Position(x,y)
down "length" rows.
Procedure Box(x,y,High,Wide :integer);
Draws a box with Position(x,y) being the upper left corner of the
box;, down "High" rows and "Wide" columns.
The Cursor is placed at Position(x+1,y+1);
Procedure StoreCursor;
Tells the terminal to store the present cursor postion.
Procedure RestoreCursor;
Restore the Cursor to the position saved by procedure StoreCursor.
Procedure SetScrollRegion(t,b :integer);
Sets the scrolling region at "t" top row and
"b" bottom row;
Procedure ResetScroll;
Sets the scrolling to default state (rows 1 through 24).
Procedure LoadLED(x :integer);
Turns on or off the four LEDs L1, L2, L3, L4 on the keyboard.
If x = 0 turn off All LEDs
If x = 1 Turn on LED L1
If x = 2 Turn on LED L2
If x = 3 Turn on LED L3
If x = 4 Turn on LED L4