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1993-06-02
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MICRO CADAM HPGL.SYS DRIVER
October 17, 1988
Hewlett Packard Graphics Language Driver
INTRODUCTION:
Note: The following information pertains to the HPGL.SYS driver
dated 9/7/88 with a filesize of 2701, and its successors.
This driver can be used to create Hewlett Packard Graphic
Language (HPGL) plot files or direct HPGL output to a valid DOS
device names. HPGL plot files are acceptable input to many
desktop publishing systems, such as Aldus' Pagemaker and Xerox's
Ventura Publisher. HPGL plot files can also be plotted on MICRO
CADAM supported plotters which accept the HPGL format. By
utilizing plot files, customers have the ability to make use of
dedicated plot workstations, third-party spooling or plot
buffering programs, or network plot capabilities. These plot
files could also be beneficial for plot service companies.
Additionally, they facilitate electronic data exchange between
companies where the receiving company is allowed the resulting
hardcopy, but it is not desirable for them to have the actual,
modifiable electronic form of the drawing. Plotting HPGL direct
to a parallel port frees up the workstation many times faster
than plotting via serial port communications. The JDL-850 GL+
plotter/printer is one device which has the ability to accept
parallel HPGL input.
The HPGL.SYS driver is installed in the config.sys file in the
root directory of the workstation's c: drive by using the
following statement:
device=c:\mcadam\hpgl.sys
The HPGL.SYS driver should be the only output device driver
installed in the config.sys file. For more information on
installation please refer to the MICRO CADAM Installation Guide.
DRIVER SPECIFIC INFORMATION:
The HPGL.SYS driver recognizes the following environmental
variables:
SET PAPER_SIZE=wxh
Where w is the width of the paper in whole number of inches and h
is the height of the paper in whole number of inches. For best
results w and h should correspond to the width and height values
of a particular MICRO CADAM model's plot data.
SET UNITS=mm
This changes the PAPER_SIZE units from inches to millimeters.
SET PLOT_ID=xxxx
Where xxxx is the Hewlett Packard model number of the targeted
plotter. Valid PLOT_ID's are 7440, 7470, 7475, 7550, 7580, and
7586. The resulting plot files are not restricted to these model
plotters as the Hewlett Packard plotters are divided into
families by number of available plotter pens, size of media
supported, location of the origin, etc.
If PLOT_ID is set equal to 7586, the driver recognizes the
additional environmental variable:
SET NFRAMES=x
Where x is the number of 45 inch long frames desired. Using
NFRAMES provides the capability to do long plots or multiple
frame plots. Techniques used to achieve long plots result in
loss of resolution of the plot which is proportional to the
number of NFRAMES. Therefore the smallest number of frames
required to fit the entire drawing should be used.
SET FLAGGING=x
This enables XON/XOFF protocol during file transfers to the
plotter. This is useful for systems that do not support the
default protocol which is direct control. Systems with UNIX or
XENIX based file servers is one case where this ability may be
beneficial.
Any of the environmental variables discussed above may be added
to the autoexec.bat file in the root directory of the
workstation's c: drive or may be entered at any time from the DOS
prompt. Typing SET followed by the ENTER key will display all
current DOS environment settings.
OPERATION FOR CREATING HPGL PLOT FILES:
1. Create your MICRO CADAM drawing as usual.
2. Place plot data on the drawing.
3. Log off MICRO CADAM.
4. Now key in plot to bring up the MICRO CADAM plotting program.
5. Key in the group, user in which the desired drawing resides.
6. Call and select the desired drawing or key in the drawing
name.
7. Wait until the plot screen returns.
8. Log off the plotting program.
9. Check your current directory for a file with a name in the
following format:
pltfile.n
Where n is a number, ie. 1,2,3 etc. Each time you run the plot
program with HPGL driver, the file number is incremented by one.
OPERATION FOR REDIRECTION OF HPGL OUPUT
Use the additional DOS environmental variable
SET HPGL=filename
to direct the HPGL output to any valid DOS filename including DOS
device names, such as LPT1, LPT2, LPT3, COM1, COM2. All the
aforementioned environmental variables are still valid in this
mode.