.PAPER SIZE 60,80
.LEFT MARGIN 1
.RIGHT MARGIN 80
.FIGURE 10
.SPACING 1
.CENTER;SFGL70 - Small Fast Graphics Library
.SKIP 1
.CENTER;Last Revision: April 28, 1980
.CENTER;Additions for 4663 plotter June 1983 B. Z. Lederman
.CHAPTER;Introduction
.SUBTITLE;Small#Fast#Graphics#Library
.LEFT MARGIN 1
.RIGHT MARGIN 80
.PARAGRAPH
SFGL70 is a UTRC developed software library. This library is intended to
provide graphics capability for the Tektronix 4010, 4006, and 4014 terminals.
The library was designed to be small (under 2K words), while providing the
user with essential graphic capabilities.
.PARAGRAPH
Because the graphics package is a library, only those routines referenced by
the users program will be linked as a part of the executable task image. 
.PARAGRAPH
Since the library has been created at UTRC, the systems programming group
welcomes your comments regarding it's performance. Any suggestions as to how
the SFGL70 can be improved are always welcome. If the content of any portion
of this documentation package is not clear, please inform us. You can call us
at: extension 7241. 
.CHAPTER;Programming Considerations
.SUBTITLE;Small#Fast#Graphics#Library
.LEFT MARGIN 1
.RIGHT MARGIN 80
.PARAGRAPH
The Tektronix terminals have an absolute coordinate system ranging from
0-1023 on the X axis and from 0-780 on the Y axis. However, the coordinate
system(window) established by GRID or WINDOW has a range from 0-920 on the X
axis and from 0-735 on the Y axis. The window is shifted right 103
coordinates and up 45 coordinates to allow labels below and to the left of
the window. 
.SKIP
.NOTE;Use with Plotter
When plotting on full (C) size paper, the full window should be visible, as
will be the case if the window is set with the locate buttons on both the lower
left and upper right corners for any size paper. If, however, B or C size paper
is used with the default page size, the full Y axis will not be available as
the paper is not as high for it's width as a CRT screen. If the desired Y axis
is N, set the YMAX for GRID or WINDOW to be N/0.875 to get the desired height.
Note also that after a HOME, the pen will be above the top of the window. 
.END NOTE
.PARAGRAPH
ASCII text may be displayed anywhere within the absolute coordinate system.
However, if a text string is attempted to be displayed outside the range of
the absolute coordinate system, the Tektronix termial hardware will insert a
carriage return and line feed into the text string. ASCII characters are 14
coordinates in width and 22 coordinates in height. The coordinates reference
the bottom left corner of each character. 
.PARAGRAPH
The operating mode of the Tektronix terminals may be either Alpha or Graphic.
The SFGL70 routines will put the terminal in the correct mode before they
attempt to do textural or graphic output. However, you must put the terminal
in Alpha mode if you wish to do Fortran output after having just performed
graphic output. 
.PARAGRAPH
We have designed the package for faster plot execution by reducing system I/O
overhead. This is accomplished by buffering all graphic output. However, the
graphic output buffer may be left partially full by any routine which returns
to the calling program while still in Graphic mode. To ensure that all
graphic output is physically sent to the terminal, the user must call any
routine which returns the terminal to Alpha mode. 
.PARAGRAPH
The Fortran program must not use a "stop" statement to exit. To ensure that
all buffered graphic output is sent to the terminal correctly, the program
should exit with a  "call exit" statement. 
.PARAGRAPH
Any user linking assembly language routines to their program should note that
the SFGL70 routines use local event flags 10 and 11. 
.PARAGRAPH
Terminals operating with the SFGL70 package must run at 9600 baud or slower.
This speed dependency is due to the delays which must be generated as a
result of terminal control functions such as hardcopy and erase. 
NOTE: for the 4663 plotter using x-on/x-off, there does not appear to be any
speed restriction. Functions such as hardcopy and erase do not apply.
.PARAGRAPH
If you are using the SFGL70 at a Tektronix 4014, you should set the character
size to 74 characters per line and 35 lines per page. 
.PARAGRAPH
.CHAPTER;Available Subroutines
.SUBTITLE;Small#Fast#Graphics#Library
.LEFT MARGIN 1
.RIGHT MARGIN 80
.INDEX GRID
GRID -
.SKIP
This routine establishes the limits of the user defined coordinate system.
The range of the X and Y axis may be between + and - 1.7 * 10**38. This
routine also displays an X and Y grid with labels. It establishes the
screen's virtual window. 
.SKIP
Returns in Alpha Mode
.SKIP
Calling Format:
.SKIP
CALL GRID(LABELX,XMAX,XMIN,YGRDLO,LABELY,YMAX,YMIN,XGRDLO,MMFLG)
.SKIP
Where:
.SKIP
LABELX	- is the ASCII label displayed below the X grid.
.SKIP
XMAX	- is the floating point maximum value of the X axis. It may be
positive, negative, or zero. It may be less than XMIN. 
.SKIP
XMIN	- is the floating point minimum value of the X axis. It may be
positive, negative, or zero. It may be greater than XMAX. 
.SKIP
XGRDLO	- is the floating point Y coordinate position of the X grid. If it is
out of range, the X grid will appear at YMAX or YMIN depending on which limit
it is closer to. 
.SKIP
LABELY	- is the ASCII label displayed to the left of the Y grid.
.SKIP
YMAX	- is the floating point mayimum value of the Y axis. It may be
positive, negative, or zero. It may be less than YMIN. 
.SKIP
YMIN	- is the floating point minimum value of the Y axis. It may be
positive, negative, or zero. It may be greater than YMAX. 
.SKIP
YGRDLO	- is the floating point X coordinate position of the Y grid. If it is
out of range, the Y grid will appear at XMAX or XMIN depending on which limit
it is closer to. 
.SKIP
MMFLG	- is a flag to specify whether the minimum and maximum values of each
grid should be displayed. a MMFLG integer value of -1 will cause the grid's
value not to be displayed. 
.SKIP
.CENTER;********************
.TEST PAGE 23
.INDEX WINDOW
WINDOW -
.SKIP
This routine establishes the limits of the user defined coordinate system.
The range of the X and Y axis may be between + and - 1.7 * 10**38. This
routine also displays an X and Y grid with labels. It establishes the
screen's virtual window. It calls GRID to perform those functions. However,
unlike GRID, WINDOW will not perform correctly if a grid minimum is greater
than the corresponding grid maximum. in addition, it computes an appropriate
number of tics to display on the X and Y grid and the distance between those
tics. This algorithm to automatically display tic marks with labels is a
compromise between making your programming easier and keeping the library
small. 
.SKIP
Returns in Alpha Mode
.SKIP
Calling Format:
.SKIP
CALL WINDOW(LABELX,XMAX,XMIN,YGRDLO,LABELY,YMAX,YMIN,XGRDLO,MMFLG)
.SKIP
Where:
.SKIP
LABELX	- is the ASCII label displayed below the X grid.
.SKIP
XMAX	- is the floating point maximum value of the X axis. It may be
positive, negative, or zero. It may be less than XMIN. 
.SKIP
XMIN	- is the floating point minimum value of the X axis. It may be
positive, negative, or zero. It may be greater than XMAX. 
.SKIP
XGRDLO	- is the floating point Y coordinate position of the X grid. If it is
out of range, the X grid will appear at YMAX or YMIN depending on which limit
it is closer to. 
.SKIP
LABELY	- is the ASCII label displayed to the left of the Y grid.
.SKIP
YMAX	- is the floating point mayimum value of the Y axis. It may be
positive, negative, or zero. It may be less than YMIN. 
.SKIP
YMIN	- is the floating point minimum value of the Y axis. It may be
positive, negative, or zero. It may be greater than YMAX. 
.SKIP
YGRDLO	- is the floating point X coordinate position of the Y grid. If it is
out of range, the Y grid will appear at XMAX or XMIN depending on which limit
it is closer to. 
.SKIP
MMFLG	- is a flag to specify whether the minimum and maximum values of each
grid should be displayed. A MMFLG integer value of -1 will cause the grid's
value not to be displayed. 
.SKIP
.CENTER;********************
.TEST PAGE 22
.INDEX PLOT
PLOT -
.SKIP
Routine to plot a continuous or dashed curve(line), within the virtual window
established by GRID. 
.SKIP
Returns in Graphic Mode
.SKIP
Calling Format:
.SKIP
CALL PLOT(NUMPTS,XARRAY,YARRAY)
.SKIP
Where:
.SKIP
NUMPTS	- is the integer number of points to be connected to plot the
curve(line). If less than zero every other point is connected. 
.SKIP
XARRAY	- are the virtual floating point X coordinates.
.SKIP
YARRAY	- are the virtual floating point Y coordinates.
.SKIP
.CENTER;********************
.SKIP
.INDEX PLOTC
.TEST PAGE 10
PLOTC -
.SKIP 2
The same as plot except the first point of the curve(line) is connected to
the last point of the last call to plot or plotc. 
.SKIP
Returns in Graphic Mode
.SKIP
.CENTER;********************
.TEST PAGE 20
.INDEX POINT
POINT -
.SKIP
Routine to display a point(s) within the virtual window established by grid. 
.SKIP
Returns in Graphic Mode
.SKIP
Calling Format:
.SKIP
CALL POINT(NUMPTS,XARRAY,YARRAY)
.SKIP
Where:
.SKIP
NUMPTS	- is the integer number of points to be displayed
.SKIP
XARRAY	- are the virtual floating point X coordinates.
.SKIP
YARRAY	- are the virtual floating point Y coordinates.
.SKIP
.CENTER;********************
.TEST PAGE 20
.INDEX POINTI
POINTI -
.SKIP
Routine to display a point(s) within the absolute window of the display. 
.SKIP
Returns in Graphic Mode
.SKIP
Calling Format:
.SKIP
CALL POINTI(NUMPTS,IXARRY,IYARRY)
.SKIP
Where:
.SKIP
NUMPTS	- is the integer number of points to be displayed
.SKIP
XARRAY	- are the absolute integer X coordinates.
.SKIP
YARRAY	- are the absolute integer Y coordinates.
.SKIP
.CENTER;********************
.INDEX TICWIN
.TEST PAGE 20
TICWIN -
.SKIP 2
Routine to display tic marks(crosses) within the complete virtual window
established by GRID. The spacing between tics is in virtual coordinates. 
.SKIP
Returns in Graphic Mode
.SKIP
Calling Format:
.SKIP
CALL TICWIN(XSPACE,YSPACE)
.SKIP
Where:
.SKIP
XSPACE	- is the virtual floating point number of X coordinates between tics.
.SKIP
YSPACE	- is the virtual floating point number of Y coordinates between tics.
.SKIP
.CENTER;********************
.INDEX TICGRD
.TEST PAGE 20
TICGRD -
.SKIP 2
Routine to display tic marks along the X and Y grid. The spacing between tics
is in virtual coordinates, as established by GRID.
.SKIP
Returns in Graphic Mode
.SKIP
Calling Format:
.SKIP
CALL TICGRD(XSPACE,YSPACE)
.SKIP
Where:
.SKIP
XSPACE	- is the virtual floating point number of X coordinates between tics.
.SKIP
YSPACE	- is the virtual floating point number of Y coordinates between tics.
.SKIP
.CENTER;********************
.SKIP
.INDEX HTEXT
.TEST PAGE 23
HTEXT -
.SKIP 2
Routine to display text horizontally, using the coordinate system (window)
established by GRID. 
.SKIP
Returns in Alpha Mode
.SKIP
Calling Format:
.SKIP
CALL HTEXT(TEXT,XCOORD,YCOORD)
.SKIP
Where:
.SKIP
TEXT	- is the ASCII string to be displayed
.SKIP
XCOORD	- is the virtual floating point X coordinate position to begin the
text display. 
.SKIP
YCOORD	- is the virtual floating point Y coordinate position to begin the
text display. 
.SKIP
.CENTER;*******************
.TEST PAGE 24
.INDEX VTEXT
VTEXT -
.SKIP 2
Routine to display text vertically using the coordinate system (window)
established by the call to GRID. 
.SKIP
Returns in Alpha Mode
.SKIP
Calling Format:
.SKIP
CALL VTEXT(TEXT,XCOORD,YCOORD)
.SKIP
Where:
.SKIP
TEXT	- is the ASCII text to be displayed.
.SKIP
XCOORD	- is the virtual floating point X coordinate position to begin the
text display. 
.SKIP
YCOORD	- is the virtual floating point Y coordinate position to begin the
text display. 
.SKIP
.CENTER;********************
.SKIP
.INDEX FLTXT
.TEST PAGE 24
FLTXT -
.SKIP 2
Routine to display a floating point number (in G17.6 Format) within the
coordinate system(window) established by the call to GRID.
.SKIP
Returns in Alpha Mode
.SKIP
Calling Format:
.SKIP
CALL FLTXT(FLTNUM,XCOORD,YCOORD)
.SKIP
Where:
.SKIP
FLTNUM	- is the floating point number to be displated.
.SKIP
XCOORD	- is the virtual floating point X coordinate position to begin the
display. 
.SKIP
YCOORD	- is the virtual floating point Y coordinate position to begin the
display. 
.SKIP
.CENTER;********************
.INDEX PLTSYM
.TEST PAGE 26
PLTSYM -
.SKIP 2
Routine to display any keyboard character(symbol) in the virtual window
established by GRID.
.SKIP
Returns in Alpha Mode
.SKIP
Calling Format:
.SKIP
CALL PLTSYM(NUMSYM,XARRAY,YARRAY,SYMBOL)
.SKIP
Where:
.SKIP
NUMSYM	- is the number of times to display the symbol
.SKIP
XARRAY	- is the array(variable) containing the virtual floating point X
coordinate position(s) to display the symbol 
.SKIP
YARRAY	- is the array(variable) containing the virtual floating point Y
coordinate position(s) to display the symbol 
.SKIP
SYMBOL	- is the ASCII symbol(character) to be displayed 
.SKIP
.CENTER;********************
.INDEX HTEXTI
.TEST PAGE 24
HTEXTI -
.SKIP 2
Routine to display text horizontally, using the display's absolute integer
coordinate system. 
.SKIP
Returns in Alpha Mode
.SKIP
Calling Format:
.SKIP
CALL HTEXTI(TEXT,IXCORD,IYCORD)
.SKIP
Where:
.SKIP
TEXT	- is the ASCII string to be displayed
.SKIP
IXCORD	- is the absolute integer X coordinate position to begin the text
display. 
.SKIP
IYCORD	- is the absolute integer Y coordinate position to begin the text
display. 
.SKIP
.CENTER;*******************
.SKIP
.INDEX VTEXTI
.TEST PAGE 25
VTEXTI -
.SKIP 2
Routine to display text vertically using absolute integer coordinate system. 
.SKIP
Returns in Alpha Mode
.SKIP
Calling Format:
.SKIP
CALL VTEXTI(TEXT,IXCORD,IYCORD)
.SKIP
Where:
.SKIP
TEXT	- is the ASCII text to be displayed.
.SKIP
IXCORD	- is the absolute integer X coordinate position to begin the text
display. 
.SKIP
IYCORD	- is the absolute integer Y coordinate position to begin the text
display. 
.SKIP
.CENTER;********************
.INDEX FLTXTI
.TEST PAGE 22
FLTXTI -
.SKIP 2
Routine to display a floating point number (in G17.6 Format) within the
absolute integer coordinate system. 
.SKIP
Returns in Alpha Mode
.SKIP
Calling Format:
.SKIP
CALL FLTXTI(FLTNUM,IXCORD,IYCORD)
.SKIP
Where:
.SKIP
FLTNUM	- is the floating point number to be displated.
.SKIP
IXCORD	- is the absolute integer X coordinate position to begin the display.
.SKIP
IYCORD	- is the absolute integer Y coordinate position to begin the display.
.SKIP
.CENTER;********************
.SKIP
.INDEX SCURSR
.TEST PAGE 25
SCURSR -
.SKIP 2
Routine to activate the graphic cursor(cross-hair), allowing the user to
position it. The cursor position is transmitted to to the computer when a
keyboard character is struck. This character along with the cursor position
is returned as arguments. NOTE: this has no relevance for the 4663 plotter.
.SKIP
Returns in Alpha Mode
.SKIP
Calling Format:
.SKIP
CALL SCURSR(ICHAR,IX,IY)
.SKIP
Where:
.SKIP
ICHAR	- is the keyboard character typed
.BREAK
	##(right adjusted if not declared as a byte)
.SKIP
IX	- is the absolute integer X screen coordinate of the graphic cursor.
.SKIP
IY	- is the absolute integer Y screen coordinate of the graphic cursor.
.SKIP
.CENTER;********************
.INDEX VCURSR
.TEST PAGE 29
VCURSR -
.SKIP 2
Routine to activate the graphic cursor(cross-hair), allowing the user to
position it. The cursor position is transmitted to to the computer when a
keyboard character is struck. This character along with the cursor position
is returned as arguments. VCURSR transforms the returned coordinates into
virtual floating point coordinates according to the window established by
GRID. NOTE: this has no relevance for the 4663 plotter.
.SKIP
Returns in Alpha Mode
.SKIP
Calling Format:
.SKIP
CALL VCURSR(ICHAR,X,Y)
.SKIP
Where:
.SKIP
ICHAR	- is the keyboard character typed
.BREAK
	##(right adjusted if not declared as a byte)
.SKIP
X	- is the virtual floating point X screen coordinate of the graphic
cursor. 
.SKIP
Y	- is the virtual floating point Y screen coordinate of the graphic
cursor. 
.SKIP
.CENTER;********************
.SKIP
.INDEX ERASE
.TEST PAGE 13
ERASE -
.SKIP 2
Routine to erase the screen. Has no function for the 4663 plotter.
.SKIP
Returns in Alpha Mode
.SKIP
Calling Format:
.SKIP
CALL ERASE
.SKIP
.CENTER;********************
.SKIP
.INDEX COPY
.TEST PAGE 14
COPY -
.SKIP 2
Routine to make a hardcopy of the screen. Has no function for the 4663 plotter.
.SKIP
Returns in Alpha Mode
.SKIP
Calling Format:
.SKIP
CALL COPY
.SKIP
.CENTER;*******************
.INDEX BELL
.TEST PAGE 17
BELL -
.SKIP 2
Routine to ring the terminal bell.
.SKIP
Returns in Alpha Mode
.SKIP
Calling Format:
.SKIP
CALL BELL(N)
.SKIP
Where:
.SKIP
N	- is the integer number of times to ring the bell.
.SKIP
.CENTER;*******************
.INDEX BAUD
.TEST PAGE 20
BAUD -
.SKIP 2
Routine to inform SFGL70 of the baud rate of the user's terminal. it is only
needed if the routines copy, erase, or bell are used. The default baud rate
is 9600. NOTE: this is not required for the 4663 plotter using x-on/x-off
and through connected to a normal terminal.
.SKIP
Returns in Previous Mode
.SKIP
Calling Format:
.SKIP
CALL BAUD(N)
.SKIP
Where:
.SKIP
N	- is the integer baud rate of the terminal.
.SKIP
.CENTER;*******************
.INDEX MVCURI
.TEST PAGE 20
MVCURI -
.SKIP 2
Routine to move the cursor to the desired screen coordinates, using the
absolute integer coordinates of the display. 
.SKIP
Returns in Alpha Mode
.SKIP
Calling Format:
.SKIP
CALL MVCURI(IX,IY)
.SKIP
Where:
.SKIP
IX	- is the absolute integer X coordinate position to move the cursor
to. 
.SKIP
IY	- is the absolute integer Y coordinate position to move the cursor
to. 
.SKIP
.CENTER;*******************
.INDEX MVCUR
.TEST PAGE 22
MVCUR -
.SKIP 2
Routine to move the cursor to the desired screen coordinates, using the
virtual window established by GRID. 
.SKIP
Returns in Alpha Mode
.SKIP
Calling Format:
.SKIP
CALL MVCUR(X,Y)
.SKIP
Where:
.SKIP
X	- is the virtual floating point coordinate position to move the
cursor to. 
.SKIP
Y	- is the virtual floating point Y coordinate position to move the
cursor to. 
.SKIP
.CENTER;*******************
.INDEX GTCURI
.TEST PAGE 20
GTCURI -
.SKIP 2
Routine to obtain the current cursor screen coordinates, using the absolute
integer coordinates of the display.
.SKIP
Returns in Alpha Mode
.SKIP
Calling Format:
.SKIP
CALL GTCURI(IX,IY)
.SKIP
Where:
.SKIP
IX	- is the absolute integer X coordinate position of the cursor. 
.SKIP
IY	- is the absolute integer Y coordinate position of the cursor. 
.SKIP
.CENTER;*******************
.INDEX GTCUR
.TEST PAGE 20
GTCUR -
.SKIP 2
Routine to obtain the current cursor screen coordinates, using the virtual
window established by grid.
.SKIP
Returns in Alpha Mode
.SKIP
Calling Format:
.SKIP
CALL GTCUR(X,Y)
.SKIP
Where:
.SKIP
X	- is the virtual floating point coordinate position of the cursor. 
.SKIP
Y	- is the virtual floating point Y coordinate position of the cursor. 
.SKIP
.CENTER;*******************
.SKIP
.INDEX BACK
.TEST PAGE 17
BACK -
.SKIP 2
Routine to move the cursor back n spaces.
.SKIP
Returns in Alpha Mode
.SKIP
Calling Format:
.SKIP
CALL BACK(N)
.SKIP
Where:
.SKIP
N	- is the integer number of times to backspace.
.SKIP
.CENTER;*******************
.SKIP
.INDEX UP
.TEST PAGE 17
UP -
.SKIP 2
Routine to move the cursor up n lines.
.SKIP
Returns in Alpha Mode
.SKIP
Calling Format:
.SKIP
CALL UP(N)
.SKIP
Where:
.SKIP
N	- is the integer number of lines to move the cursor up.
.SKIP
.CENTER;*******************
.INDEX DOWN
.TEST PAGE 17
DOWN -
.SKIP 2
Routine to move the cursor down n lines.
.SKIP
Returns in Alpha Mode
.SKIP
Calling Format:
.SKIP
CALL DOWN(N)
.SKIP
Where:
.SKIP
N	- is the integer number of lines to move the cursor down.
.SKIP
.CENTER;********************
.SKIP
.INDEX HOME
.TEST PAGE 16
HOME -
.SKIP 2
Routine to move the cursor to the home position (top left corner of the
screen). NOTE: when plotting on A or B size paper with default coordinates,
home will be outside (above) the printing window by about 4 lines in the
default character size.
.SKIP
Returns in Alpha Mode
.SKIP
Calling Format:
.SKIP
CALL HOME
.SKIP
.CENTER;********************
.SKIP
.INDEX ALPHA
.TEST PAGE 13
ALPHA -
.SKIP 2
Routine to return the terminal to Alpha mode.
.SKIP
Returns in Alpha Mode
.SKIP
Calling Format:
.SKIP
CALL ALPHA
.SKIP
.CENTER;********************
.SKIP
.INDEX BLKBOX
.TEST PAGE 17
BLKBOX -
.SKIP 2
Routine to inform the graphics package that the graphics terminal is on a
shared line with the hardcopy device. NOTE: this does not apply to a 4663
plotter which is passing through to a normal terminal. In this case, the
plotter must be set up to intercept commands, and should be turned on
or off as required (see PLOTON, PLOTOF).
.SKIP
Returns in Previous Mode
.SKIP
Calling Format:
.SKIP
CALL BLKBOX
.SKIP
.CENTER;********************
.CHAPTER;ADDITIONS FOR PLOTTER
.TITLE;#Additions for plotter
.LEFT MARGIN 1
.RIGHT MARGIN 80
.PARAGRAPH
The following additions are for the 4663 series plotter, although some are also
relevant to 4014 type terminals. Unless otherwise specified, the commands are
Type 1, the attention character is an Escape (octal 33), and the device address
is "A". 
.BLANK 3
.TEST PAGE 13
.INDEX PLTRON
PLTRON -
.SKIP
Turns on the plotter. This should be sent first to inform the plotter it is to
respond to any commands which follow.
.SKIP
Returns in default mode of plotter.
.SKIP
Calling Format:
.SKIP
CALL PLTRON
.SKIP
.CENTER;********************
.SKIP
.TEST PAGE 13
.INDEX PLTROF
PLTROF -
.SKIP
Turns off the plotter, does a call to ALPHA, and so will flush the buffer.
This should be the last command to the plotter.
.SKIP
Returns in Alpha Mode
.SKIP
Calling Format:
.SKIP
CALL PLTROF
.SKIP
.CENTER;********************
.SKIP
.TEST PAGE 44
.INDEX PLTSET
PLTSET -
.SKIP
Sends an attention (Escape) followed by a single byte. This is a Type#1 or
Type#2 command depending upon the character sent, and may be used to change the
line type, character size, etc. Once the character size or line type has
been changed, it remains in that state for all subsequent commands until reset.
.SKIP
Does not change mode.
.SKIP
Calling Format:
.SKIP
CALL PLTSET(byte)
.SKIP
Where:
.SKIP
byte - is the single byte to be sent. The following are valid for the
4663 plotter and 4014 terminal:
.LIST
.LE;a - sets the line type to dots.
.LE;b - sets the line type to dash-dot.
.LE;c - sets the line type to short dashes.
.LE;d - sets the line type to long dashes.
.LE;e - sets the line type to solid (the default after a device reset).
.LE;8 - sets the characters to the largest size (the default after reset).
.LE;9 - sets the characters to size 2.
.LE;: - sets the characters to size 3.
.LE;; - sets the characters to the smallest size.
.LE;Form-Feed (octal 14) resets graphic characteristics, sets the
line type to solid, puts the pen at home (upper left corner). See PLTREG
.END LIST
Other characters will be valid for the 4014 (such as write through or
defocus) but not for the 4663. Other line types repeat those given above.
.SKIP
.CENTER;********************
.SKIP
.TEST PAGE 12
.INDEX PLTREA
PLTREA -
.SKIP
Resets the Alpha characteristics (character size, font, slant, rotation).
.SKIP
Returns in default Mode
.SKIP
Calling Format:
.SKIP
CALL PLTREA
.SKIP
.CENTER;********************
.SKIP
.TEST PAGE 11
.INDEX PLTREG
PLTREG -
.SKIP
Resets Graphic characteristics (line type, carriage position). See
Form-Feed under PLTSET.
.SKIP
Calling Format:
.SKIP
CALL PLTREG
.SKIP
.CENTER;********************
.SKIP
.TEST PAGE 10
.INDEX PLTRES
PLTRES -
.SKIP
Resets Graphic and Alpha characteristics by calling PLTREG and PLTREA above.
.SKIP
Calling Format:
.SKIP
CALL PLTRES
.SKIP
.CENTER;********************
.SKIP
.TEST PAGE 14
.INDEX PLTLOD
PLTLOD -
.SKIP
Moves the pens to load point. As this is the upper right corner which is
usually outside the window, the locate buttons will light. This does not
generate a pause, and any commands which follow will be executed, so if
a pen change is desired, the program must prompt the user. The command is
useful immediatly prior to PLTROF to move the pens away from the paper.
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Calling Format:
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CALL PLTLOD
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.CENTER;********************
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.TEST PAGE 18
.INDEX PLTPEN
PLTPEN -
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Selects a pen for subsequent use.
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Calling Format:
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CALL PLTPEN(n)
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Where:
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n - is the pen number. The command does a modulo 4 reduction of this parameter,
so that only numbers 0, 1, 2, or 3 result (even if a letter or non-integer
number is used). 1 and 2 select the respective pens, 3 causes no change.
0 selects the cross hairs, but the next command requiring something to be drawn
will result in the previous pen being re-selected. 
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.CENTER;********************
.SKIP
.TITLE;Index
.SUBTITLE;Small#Fast#Graphics#Library
.PAGE
.PRINT INDEX