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README
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1993-04-26
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===============================================================
GRIDLOCK version 2.0 (README file)
===============================================================
Copyright (C) 1993 Fred Lee
All rights reserved
Thank you for giving GRIDLOCK a try. GRIDLOCK is a shareware
program. That means that you can try it without paying too much
money for it. If you decide to use it, you are expected to
register the program with the author and pay him for it. The
price is only $25. In return, you will get such good things
as telephone help if you need it, notification of updates, a
map of the area where the game takes place, some very useful
charts, and one fairly good solution to the traffic problem.
Here is the address: Fred Lee
888 S. Mary Avenue
Sunnyvale, CA 94087
Tel: (408)736-0828
Note: PLEASE mention your version-number when you write.
ABOUT THE GAME
GRIDLOCK gives you a section of a city and lets you control its
traffic by selecting the types of traffic lights or stop signs to
put at the intersections and setting the lengths of the cycles.
The computer provides most of the traffic to test your designs
while you get to program the routes of two test cars.
EQUIPMENT NEEDED
GRIDLOCK is designed for IBM PCs or compatibles with at least
512K bytes of RAM and EGA or VGA color graphics. Your computer
should have a clock-speed of at least 16 MHz. (Slower computers
slow down the action but even at 10 MHz the speed is still
tolerable.) The computer should have version of 3.2 or higher
of the DOS operating system. The game is played from the
keyboard. No mouse or joy-stick is needed.
THE FILES AND HOW TO RUN THEM
The files that you should have on your disks are these:
README this message
GL.EXE the GRIDLOCK program
GRIDLOCK.RTS must be on the disk with GL.EXE
GRIDLOCK.DAT saves game conditions, must be on
the disk with GL.EXE
GRIDLOCK.TXT the instructions
To read the instructions from your screen, put the diskette with
GRIDLOCK.TXT on it into drive A, set the computer to drive A, and
type TYPE GRIDLOCK.TXT. If you can print them out on a printer,
reading is much easier. To print them, type PRINT GRIDLOCK.TXT.
Or you can use your word processing program to read or print this
ASCII file.
To play the game, put the diskette with the file GL.EXE and
the files GRIDLOCK.RTS and GRIDLOCK.DAT into drive A, set the
computer to drive A, and type GL <ENTER>. Or you can copy these
files to the hard disk and run them from there.
Getting the disk started can be speeded up if you haven't stored
the conditions of a previous game or you don't care about starting
with those conditions. In that case, start the game by entering
GL SKIP instead of just GL. That makes the computer skip the
reading of the .DAT data file.
THE OBJECTIVES OF THE GAME
One object of the game is to design a system of traffic controls
that will let maximum traffic flow without getting hopelessly
blocked intersections (gridlock). That isn't easy to accomplish.
Another object of the game is to design the traffic system so
that the test cars drive their routes in the shortest amounts
of time.
LEARNING THE GAME
When you first turn on the program, it is suggested that you try
the RUN option (3) of the main menu first. (Select some medium
amount of traffic when asked - say 40% - and choose not to speed
up traffic.) Then watch the cars. Watch how traffic flows
without any traffic controls and see where it is the heaviest.
You can change the amount of traffic by pushing F1 and selecting
the RUN option again. After you have studied the traffic, try
putting in some traffic controls using option 1 of the main menu.
You will want to switch back and forth between these options,
making changes in the lights and then testing them in the RUN mode.
(If you have heavy traffic on the screen, stop the RUN mode to
change a traffic light, and then re-start the RUN mode, there is a
small chance that cars in the changed intersection could find
themselves in trouble and have an accident. To prevent that,
clear the traffic before you re-start the RUN mode.) After you
have designed some traffic systems, you can program the two test
cars, using option 2, to see how your systems compare with each
other.