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HELP.DOC
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1992-08-11
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HELP MENU INDEX
(Select Help Subject)
o Introduction
o SKEM 1.0 Background
o Screen & File Structure Definition
AVAILABLE MAIN MENU CHOICES
o File...(Load or Save schematic, Clear screen)
o Text...(Add to or erase any text from schematic)
o Undo...(Remove last drawn symbol, line or text)
o Line...(Add or Remove Horiz/Vert Line)
o Sym....(Select a symbol to place into schematic)
o Rot....(Select the needed symbol orientation)
o Print..(Send schematic to the HP laser printer)
o Info...(Displays Schematic Name and Symbol Count)
o Help...(User On-Line-Help)
o Quit...(Return to DOS)
INTRODUCTION
SKEM 1.0 is a user friendly schematic drawing program. It
allows you to easily and quickly draw and/or print professional
looking schematics. SKEM 1.0 is designed to operate on any IBM
or compatible computer with 640K of RAM and a 640 by 480 VGA
video system. A 386SX-16mHz or faster computer with a hard drive
is highly recommended. Listed below are some of the key features.
- SKEM 1.0 is fully menu driven for ease of use, controllable
via a Microsoft or compatible mouse.
- Symbols, Horiz/Vert Lines and Text can be added to or erased
from a schematic.
- Symbols can be rotated 90 degrees or flipped horizontally to
provide 8 different orientations.
- Additional symbols can be designed and placed into the symbols
library via the Symbol Editor program, sent when registered.
- Your schematics can be saved and later retrived for additional
editing or printing.
- Printing a schematic drawn by SKEM 1.0 can only be performed on
HP laser or compatible printers. Sorry no dot matrix printers.
- Built in Help Function.
- SKEM 1.0 uses a 4 dot wide snap-to-grid (not visible) to give
the user the ability to easily align symbols, text or lines.
- The X and Y location of the drawing cursor or symbol is
displayed on the screen to allow ease of placement/positioning.
- If needed, there is a 16.6 pitch landscape font for downloading.
SKEM 1.0 BACKGROUND
There are already many CAD programs on the market today that can
draw schematics, so why SKEM 1.0? The typical CAD program is a
verstile program with the ability to draw a wide variety of very
complex objects. There are so many different functions available
in these CAD programs that one can easily become lost in their
various modes of operations.
SKEM 1.0 was developed to fill the need for a simple, easy to use
schematic drawing and printing program. SKEM 1.0 is only intended
to be used to draw and print schematics (nothing else). It is not
a CAD program. A professional looking schematic can be made in
minutes. Printing a schematic is performed using an HP laser
printer (or equivelant). I will work on development of a print
driver for a dot_matrix print driver in the months to come. The
number of registrations I receive will have a direct affect on
this and other enhancements to SKEM 1.0.
The drawing screen is 640 dots wide by 440 dots high. The max
screen size of a symbol is limited to 56 by 56 dots. All Symbols
drawn on the screen are constructed from drawing commands within
files that have a .SCR as an extension. Linked to the each screen
.SCR symbol file is a .PTR (Bit-Map) file to allow printing of the
symbol. The printer Bit-Map files are constructed in the SYMBOL
EDITOR program at the time when the design of a symbol has been
completed. The printer Bit-Map pattern is 3 times the dot
resolution of it's equivelant screen symbol.
Included with SKEM 1.0 is a small 16.6 pitch landscape soft font
which can be downloaded to your laser printer if it does not have
an internal 16.67 pitch landscape font.
SCREEN & FILE STRUCTURE DEFINITION
- SCREEN...The drawing screen is configured to 640 dots across by
440 dot high. A plotting symbol can be a maximum of
56 by 56 dots. The drawing screen has a hidden grid
of 4 dots by 4 dots. When moving anything (a symbol,
text or finger) on the drawing screen, they will jump
4 dots horizontally or vertically. This allows for
easily placement and alignment of the symbols and
interconnection lines.
- FILE.....The symbols drawn on the screen are saved in a master
list in the computer memory. For a symbol the name,
rotation orientation and X/Y plotting coordinates are
saved. For an interconnection line a H or V is saved
along with the X/Y starting location and line length.
Plotable TEXT is saved as T, X/Y plotting location
and the text information. When SAVE is selected from
the FILE FUNCTION menu, the master list is saved as an
ASCII file with a file extension of .SKM. You can
view and even edit the ASCII SKEM file (for example to
make slight changes to plotable TEXT information).
- PRINTER..The printing of a schematic is performed by reading
the ASCII (.SKM) file. Everything plotted on the
screen is sent to the printer 3 times in size and
location. ALL X/Y plotting locations are multiplied
by 3 and sent to the printer. The symbol that is to
be printed is derived from a corresponding BIT-MAP
pattern. The printing BIT_MAP pattern of a symbol is
3 times the size of it's respective screen symbol.
The symbol's BIT_MAP file is generated in an optional
symbol editor program (available at registration).
FILE FUNCTIONS
- LOAD....Displays a file list (sorted by file name) of ALL .SKM
schematic files that are available for loading. To
select a schematic for loading, double-click the left
mouse button on the file name of the file you wish to
load. You can switch to a different sub-directory by
double-clicking the left mouse button on the \.. or to
select a different drive, click on NEW DRIVE button.
- SAVE....Pops open a window to allow you to type in a new file
name (max of 8 chars) or if the schematic on the screen
had been previously loaded, its file name will appear
as a prompt. You can hit the ENTER key to accept the
current file name or BACK SPACE over it and type in a
new file name. Upon hitting the ENTER key after a file
name is present, the schematic on the drawing screen is
saved with the entered file name along with a default
extension of .SKM. To cancel this operation, hit ENTER
when the cusor is in the left most position.
- CLEAR...You will be prompted by a YES/NO menu to confirm your
wish to clear the drawing screen and master list.
- CANCEL..Allows you to QUIT this menu and return back to the
drawing screen. Right mouse button does the same.
The free space on your currently displayed drive is shown on the
bottom of the file selection window.
TEXT FUNCTION
- ADD TEXT.....When the TEXT mode is selected a pop-up window
will appear. You then can type in the needed
text. Up to 12 letters, numbers or puncuation
characters can be typed in. When finished typing
the needed text, hit the ENTER key. The pop-up
window will disappear and the text that was just
typed will become a plotable symbol, moveable via
the mouse. To plot the text, position it at the
needed location and hit the LEFT mouse button.
- DELETE TEXT..Use the above procedure (ADD TEXT) as if you were
going to add new text. Instead of hitting the
LEFT mouse button to plot the text, overlay the
first letter of the new text (can be the original
text) on top of the first letter of the old text.
The first letter of the old and new do do not
have to match. This time hit the RIGHT mouse
button and both the old and new text disappear.
The new text will re-appear when the mouse is
moved. You can move the new text to the correct
location for plotting or hit the RIGHT mouse
button again to exit the TEXT MODE.
- CANCEL.......There are 2 ways to exit out of the TEXT MODE.
1. Hit ENTER when there is no text in the window.
2. Move the text to the top of the screen. When
it reaches the menu bar, it will change to the
pointing finger. You can then select SYM to
grab another electrical plotting symbol or
select QUIT to exit the program.
UNDO FUNCTION
- When you click on the UNDO button, the last drawn symbol, line
or plotable text item is deleted from the master list. The
screen is then erased and redrawn to display the schematic with
the last drawn symbol deleted.
IMPORTANT: when UNDO removes the last drawn symbol,
it is gone forever.
You could take a 100 element schematic and UNDO every plotted
symbol, line or piece of text by clicking on the UNDO button
100 times. It would be a little faster if you wanted to
remove every plotted symbol from the schematic to just use
the CLEAR function on the FILE menu.
LINE FUNCTION
DRAW..Clicking on the LINE button with the LEFT mouse button puts
you in the LINE DRAW mode. When in the line drawing mode,
a crosshair appears that covers the complete drawing screen.
There are 2 modes in the line drawing function.
1. DEFINE THE STARTING X/Y LOCATION OF A LINE.
This function is performed when the color of the top bar
is Blue. Clicking the LEFT mouse button defines the
intersection of the crosshair as the starting point of a
line. As you move the mouse, you will see the rubber
band effect of the drawing of the line. Position the
crosshair at the end point location of the line you wish
to draw, click the LEFT mouse button to define the ending
X/Y location (see # 2). To EXIT out of the line draw
mode, click the RIGHT mouse button at this point.
2. DEFINE THE ENDING X/Y LOCATION OF A LINE.
You can only plot horizontal or vertical lines in the
LINE DRAW FUNCTION (Symbol library has diagonal lines).
This function performed when the color of the top bar is
green. When you click the LEFT mouse button, the ENDING
point is defined, the line is plotted and a NEW STARTING
X/Y location for an additional line is also defined.
This allows you to draw a new line at the end of the
previously drawn line. To stop the continuation of draw
one line at the end of another, click the RIGHT mouse
button. The TOP bar will turn back to blue to signifiy
you are back in the mode to define a new STARTING POINT.
ERASE.Clicking on the LINE button with the RIGHT mouse button
puts you in the ERASE LINE MODE. When in the ERASE LINE
mode, the pointing finger appears and the color of the top
bar changes to red. To erase a line, point to it and click
the LEFT mouse button. The RIGHT mouse button exits.
SYM FUNCTION
Clicking on the SYM button switches you to a graphical display
screen that shows ALL available symbols. The mouse is used to
select which symbol you would like to plot on the schematic.
The RIGHT mouse button EXITS out of the symbol selection
function. Clicking the LEFT mouse button switches you to a
screen that displays the 8 possible rotation/flip orientation
positions of the selected symbol. Select the orientation
needed with the LEFT mouse button.
The ANALOG/DIGITAL selection buttons are not implememnted at
this time.
Symbols are created by using an editor program that is sent to
you upon registration of SKEM 1.0.
ROT FUNCTION
Clicking on the ROT button when a symbol is the moveable icon on
the drawing screen will display the 8 possible rotation/flip
orientation positions of the active symbol. The LEFT mouse
button selects the orientation needed.
PRINT FUNCTION
Clicking on the PRINT button will pop-up a small menu giving you
3 possible choices.
- PRINT........Sends the schematic displayed on the drawing
screen to the laser printer on LPT1. During the
printing of the schematic, a TIME COMPLETED BAR
CHART window appears to indicate the progress of
the printing process. You can terminate the
printing operation by hitting the Esc key during
the printing operation. If you hit Esc, a pop-up
window appears asking if you want to EJECT the
partially drawn page from the laser printer. If
you do not eject the page, you should clear the
laser printers buffer immediately. If you QUIT
SKEM 1.0 when a partial schematic is in the laser
printer's buffer, it will be printed. After you
answer the EJECT Y/N prompt.
- DNLOAD FONT..SKEM 1.0 selects the laser printer internal 16.67
pitch landscape font. If your printer does not
have an internal 16.67 pitch font, download the
16.67 font included with SKEM 1.0. This works
only on laser printers that are HP compatible and
have the ability to accept downloaded fonts.
- PRINT SYM'S..Prints a table of all the available symbols. Each
symbol is drawn in a box, labled with it's name
and number as listed in the SYM_SCR.IDX file.
- CANCEL.......Returns back to the drawing screen without
printing the schematic.
INFO FUNCTION
Displays a pop-up window showing the current file name of a
previously loaded schematic appearing on the drawing screen,
the number of symbols in that schematic and the amount of
free space in your RAM.
HELP FUNCTION
Displays a HELP INDEX MENU to allow you to select HELP on
general information about SKEM 1.0 or HELP for a specific
function in SKEM 1.0.
QUIT
Displays a pop-up window to confirm if you really want to QUIT.
If you click on Yes, SKEM 1.0 terminates and you'r returned to
DOS. If you click No, you are returned to the drawing screen.