These are the instructions from the Galoob code book
(NES) on how to program your own Game Genie codes, and
how to modify existing codes.



PROGRAMMING YOUR OWN CODES:

The codes listed in this manual give you an idea of the
kinds of effects you can create by programming your own
codes to enhance game play and add to your enjoyment.

When programming your own codes, keep in mind the
following guidelines:

*The easiest way to program your own codes is to make
slight changes in existing codes. In the next section,
there are simple tables that show you how to change the
example codes in the manual to create effects you might
enjoy.

*If you are making small changes to existing codes, it
is best to leave the same number of letters in the code.

*You can also program codes by simply using random
letters. The best results are obtained when you make up
codes of 6 letters.

*Using 3 codes at a time makes it more likely to get an
effect, but it's a more difficult way to program random
codes, since it's harder to tell which code is making
the effect happen.

*Most codes of the proper length will have some effect,
but often it will be such a small change that you will
not even notice any difference. You may have to try 
many random codes before you get an interesting effect.

*If you find a random code that has an interesting 
effect, then try changing it by using the programming
techniques in the next section. This way, you are more
likely to "home in" on a really good effect.

Your success in code programming will depend a lot on
luck. Keep trying! Of course, some of the effects you
create you may not like. Almost any effect is possible-
good, bad, interesting, annoying, fun, or just plain
silly.

If a code you program interrupts the game or causes an
undesired effect, just turn off the power and turn it
on again, and then program different codes to play.

======================================================

HOW TO PROGRAM: (Modifying existing codes)

There are two basic methods used to program your own
codes by changing existing codes.

Using Method #1, you change either the first or second
letter of the code. Using Method #2, you change either
the first or last letter of the code.

You can also combine both methods if you wish.

Method #1 and Method #2 will work best on single codes,
when the effect of the code you wish to change has
numbers in it (for example, number of lives, number of
bullets, number of weapons, number of seconds or minutes
on the timer).

The best way to proceed is to write down the original
code, look up the choices in the tables below, and then
write down all the variations below the original code.
This way, you can return to your Game Genie with your
own list of codes to try.

Reminder: If a code you program interrupts the game or
causes an undesired effect, just turn off the power and
turn it on again, and then program different codes to
play.

======================================================

METHOD #1

Using method #1, you change either the FIRST or SECOND
letter of the original code. First try changing the
first letter and write down the new code. Then try
changing the second. Then try changing both the first
and the second at the same time.

HOW TO USE THE TABLES: Find the letter you want to 
change in one of the tables. Then substitute one of the
other letters in the same table.

The farther apart two letters are in the table, the
bigger the change in the effect will be. For example,
in Table 1, changing A to Y will make a bigger 
difference than changing A to Z. In Table 2, changing
V to O will make a bigger difference than changing 
V to S.

TABLE 1: A P Z L G I T Y

Example: If the first or second letter of the code is P,
you can change it to A,Z,L,G,I,T or Y. Try them all!

TABLE 2: E O X U K S V N

Example: If the first or second letter of the code is U,
you can change it to E,O,X,K,S,V or N. Try them all!

=======================================================

METHOD #2

In method #2, you change either the FIRST or LAST letter
of the original code.  First try changing the first
letter.  Then try changing the last.  Then try changing
both the first and the last at the same time.

HOW TO USE THE TABLE: Find the letter you want to change
in the table below and change it to the letter on its
right.

TABLE 3:

A can be changed to E
E can be changed to A
G can be changed to K
K can be changed to G
P can be changed to O
O can be changed to P
Z can be changed to X
X can be changed to Z
L can be changed to U
U can be changed to L
I can be changed to S
S can be changed to I
T can be changed to V
V can be changed to T
Y can be changed to N
N can be changed to Y

EXAMPLES: If the first letter of the code is O, you can
change it to P.  If the last letter of the code is Y,
you can change it to N.