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ABSTRACT for the CSM PLOTTING PACKAGE 10-Apr-84
The CSM Plotting Package replaces subroutines PLOT, SYMBOL, and SETABL in
FORLIB version 6 or 7. Output can be sent to TEKTRONIX terminals, ReGIS
devices, or to a compressed plot file on disk. The compressed plot file is
smaller than DEC's spooled file by a factor of over 20 to 1. The plot file can
be viewed on a graphics terminal before being sent to the system queue.
SYMBOL.DAT includes 13 fonts, including the Greek alphabet. Modifications to
SPROUT allow it to drive both an XY10 plotter or a Houston Instruments plotter
with a PTC-6 or CPS-15 interface.
The CSM Plotting Package was invented out of necessity. We make daily plots
of system statistics, showing number of jobs, core used, idle and overhead time,
etc. Back when we had a KA-10, all our disks were RP02s and RP03s, and running
DEC's subroutine PLOT to a spooled disk file would fill up an RP02 rather
quickly. Therefore Rex Shadrick developed a compressed plot file, in which
delta-X and delta-Y were encoded in one or two halfwords. Moves requiring 700
6-bit bytes were reduced to a single 36-bit word. Also included in the
compressed plot were op-codes to control a plotter with 3 pens. The PLTSPL
program was modified to read the compressed plot file and expand the movements
to single-increment bytes, which were then sent to the XY10 plotter interface on
the I/O bus. Later routines were added to drive the TEKTRONIX 4010 graphics
terminal, and a program was written to read a compressed plot file and display
it on the TEKTRONIX terminal.
Another of Rex's improvements was to replace subroutine SYMBOL. DEC's table
of characters had limited resolution, and had to be in core at all times. A
file named SYS:SYMBOL.DAT was built, and subroutine ISETAB read it into core.
Included in the file are fonts for italics, olde English, and script writing.
Since then, the plotting package as been upgraded to 6.03, 7.01, and 7.02.
It now works with FORTRAN-10 version 6 and FORTRAN-77 version 7. (An old
version for FORTRAN-10 version 5 is available.)
Subroutine PLOT can talk directly to a graphics terminal, or it can write to
a disk file. The TEK program can be used to view this disk file, even on
systems with no plotter. The graphics terminals currently supported are:
TEKTRONIX 4006, 4010, 4012, 4014, 4025, and compatible terminals
VT125, VK100/GIGI, VT240, PRO-350, and compatible ReGIS terminals
Houston Instruments DMP-4R, DMP-7R, and compatible ReGIS plotters
The SPROUT program currently supports the following plotters:
All CALCOMP models connected to an XY10 controller on the I/O bus
Any Houston Instruments plotter connected to a PTC-6 controller TTY
Houston Instruments CPS-15 plotter connected to a TTY line
The current version of the software is V12A. Version 12B will utilize the
hardware character generator in devices that support it, and will be able to run
unmodified under TOPS-20.
Colorado School of Mines
1500 Illinois Street
Golden, CO 80401