more blows on the opposing boxer than he
gets on himself. The player doesn't have to
use this button and is able to drop the opposing
boxer with left and right blows. With a com-
bination of joystick moves and the blow
buttons, the challenger (player, is able to
deliver uppercuts too.
The game is very large, measuring 72.5" in
height, lending to it the impression of a large
boxer, not that it looks like a boxer, but looks
about as tall as a large one. It has to be tall to
include the use of the second monitor. The
use of the second monitor would seem to be
superfluous, except for its eye appeal to the
passerby. The upper monitor is used mainly
by background video circuitry to show the
boxing card illustrating the present opposing
boxer, the challenger, who is the player, the
time left in the round, and the strength status
of each boxer. The game employs state-of-
the-art video graphics both in the upper
monitor and even more so in the bottom
monitor. The crowd in the arena is not just
block shapes, but really defined characters.
Some are taking pictures, some cheering on
the challenger, some the opposing boxer, and
funniest of all, Mario and Donkey Kong over at
the edges of either corner of the ring. Donkey
Kong seems to be rooting for the opposing
boxer and Mario is rooting for the challenger
- how expected!
Other features about the cabinet are the
use of the over/under coin door with the
American style coin acceptors, two speakers,
one for the voice and one for the music, and
wheels on the back of the game to roll the
game around. The coin door has lighted entry
chutes and there is a coin counter which
Nintendo has always used. Be aware that it is
a 24vdc counter. Inside the coin door is
service switch which in this game, unlike
some other Nintendo offerings, is only for
adding credit without a counter, not to enter
the service mode. You can enter the service
mode via this switch, but only if you turn the
game off and then back on while holding the
switch in. Also, the service switch, like the
coin switches, has a reaction window which
prevents the use of a coin on a string.
a
BELFTEBT
This self test is a little lacking in complexity. To
get into the service mode, use either the
above mentioned procedure with the service
switch or set the self-test switch toggle P
(SW2) to the ON position and turn the game
on. All that is contained in this test is the RAM
and ROM test for the CPU ROM and RAM,
telling you bif they are bad by the letters NG or
OK if the chip is good. This is enough for me,
but may not be good enough for operators
who would like a switch test on the screen. To
get around this, one will simply have to play
the game to see if the switches are working. It
shouldn't be hard to check the joystick and
blow buttons because they have immediate
effects on the game play, but the KO buttons
operation may be hard to check, especially if
the checker can't get to the proper KO status.
ELECTRICAL
The first thing the power cord encounters
from the wall socket is the line fuse and the
line filter. This 5-amp fuse (120vac) is the only
fuse for the game aside from the monitor
fuses. After the line filter, the power switch
opens and closes both sides of the line. After
this, the line current works into the primary
side of the power transformer. The poi 1 er
transformer supplies isolated supply as he
one used in VS. Tennis and has special pl gs
for the line supply and the logic. It won' be
exactly easy for the technician or ope rat r to
change the supply out if it fails becaus~ the
plugs. Oh yes, the switching power suppl has
a fuse inside of it too. Yet they put th fuse
inside because when it goes, som thing
drastic has usually happened and re lacing
the fuse without first checking out the parts of
the supply could only result in more damage
to the supply and maybe even the logic. So to
those people who may have this condition
mentioned above, beware of the possible
result. Unplugging the logic power plug would
be the best thing to do if you would attempt to
change this fuse.
LOGIIC BOARD
This logic board has a lot of circuitry on it as
one might expect, it being a two-monitor
game. The board is divided into three sections,
one being the main CPU board which has the
main CPU, voice, and sound generating
sections; the second board being the video
board which contains the largest amount of
memory for the generation of the boxers and
FIGURE "I: SC3UARE WAVE OSCILLATOR CIRCUIT
OUTPUT
1K..n..¼W
+5vdc
1
2
=
R2
1K
@
GND
555
v+
TRIGGER
DIS
OUTPUT
THR
RESET
CV
IC1
R1
8
7
6
C1
5
C2
I_ .01 UFO @ 10v
10KD..
LINEAR TAPER
PARTB LIST
IC1 555 TIMER OSCILLATOR
R2 1 K.n..@ ¼W OR GREATER
R3 SAME AS R2
R1 1 OK ,n_ LINEAR TAPER
C1 .01 UFO AT 10v OR GREATER
C2 2.2 UFO AT 10v OR GREATER
+
I_
2.2UFD@ 10v