Play Meter

Issue: 1978 June 30 - Vol 4 Num 12

Update in Atari's
Interchangeability
Chart
Vol. 4, No. 12
June 30, 1978
Staff
Publisher and Editor:
Ralph C. Lally II
Managing Editor:
David Pierson
International Editor:
David Snook
Editor, Coin Slot
Technical Editor:
Robin Minnear
Game Doctors
Correspondents:
Roger C. Sharpe
Gene Seley
Dick Welu
Art Direction :
Katey Schwark
Administrative Assistant:
Valerie Mitchell
Typography:
Vickie Lofton
Circulation Manager:
Debbie Barnes
Staff Cartoonist :
Norm Rockwell
Advertising Representative :
Ralph C. Lally II
European Representative :
Esmay Leslie
PLAY METER , June 30, 1978.
Volume 4, No. 12. Copyright 1978 by
Skybird Publishing Company. PLAY
METER is published semi-monthly on
the 15th and end of the month .
Publishing offices : 112 North Road-
way, New Orleans, La . 70124, P.O.
Box 24170, New Orleans, La. 70184 .
Tel. : 504 / 282-0261 . Subscription
rates: U.S. and Canada - $25; Europe
and Japan - $45; elsewhere - $50 .
One order subscription : 2-9, $20
each; 10-24, $17 each ; 25 or more,
$15 each . Advertising rates available
on request . No part of this magazine
may be reproduced without expres-
sed permission . The editors are not
responsible for unsolicited manu-
scripts . Second-class postage paid at
New Orleans 70113 . Postmaster:
Send Form 3579 to PLAY METER ,
P.O. Box 24170 , New Orleans, La .
70184.
European office : PLAY METER Pro-
motions, 15 Great North Road,
Brookmans Park, AL 9 6 LV,
Hertfordsh ire, England .
There has been an update with minor changes in the chart outlining the
interchangeability of pinball manufacturers' coils with Atari devices . The
outdated chart appeared in PLAY METER's Update Edition for May 26 .
This information is based on current games from the manufacturers; so
it is possible there may be other coils from older equipment that would
work . However, without adequate testing on a particular part , Atari cannot
recommend random replacement.
It is important that all the footnotes be read and heeded .
On all coils listed below (except Bally coil #AQ-25 -500134-5050) diodes
must be replaced with 1N4005 diodes before installing these coils in Atari
machines. Before remov ing coil from Atari machine identify harness wire
connected to coil terminal on the striped (cathode) end of diode. Connect
th is wire to similar terminal on replacement coil.
INfERCHANGFABll..ITY CHART WITH ATARI DEVICES
MANUFACTURER I Part Number
ATARI DEVICE
GOTfl..IEB
BALLY
Sf ERN
Wll..LIAMS
. ..
AQ-25-500/
34-5050 #
. . .
. ..
Sling Shot
A-5195
AN-26-1200
J -25-1050
G-25-1100
Thumper Bumper
A-5195:t:
AN-26-1200
:t:
J -25-1050
G-25-1100
....
. ..
J -25-1050
G-25-1100
Flippert
Drop Target
#
Not necessary to replace diodes , but the coil is wound opposite
therefore when installing it in Atari machine swap the harness wires going
to the two outer terminals of the coil. May not be used for an extended
period because it is likely to shorten life of the flipper button switch
t Interchange only with Atari part no. A020470-01 (Orange wrapper)
coil. DO NOT REPLACE the retrofit flipper coil (Red wrapper) Atari part
no. A020498-01 with any other coil
:t:
Thumper Bumper action will be noticeably weak
• • • DO NOT USE- Tested and found unacceptable for use in Atari
machines
By Paul Crankshaw
of Electronic Amusement Service
Learning logic circuits
INPUT
OliTPUf
0
I
1
0
INVERTERS
Figure 1
All your digital equipment , from
Pong to Sea Wolf II to the electronic
pin games, are constructed from a
few basic circuits. The microproces-
sor games have other more complex
circuits but still use many of the basic
circuits. Once you learn the basic
logic circuits you will be able to
understand and determine the oper-
ation or detect the non -operation of
the digital game .
A logic circuit performs some
specific logic functions on binary
data. Binary data is information in
the form of O's and 1's. A logic 0 is a
lo or ground and a logic 1 is a hi or
+ 5 v. level. Ajgic data ~be
termed as A or A. (or 1H or 1H) ; a
signa! name may mean anything , but
single letters are easier for examples .
Data A is lliLnerally an originating
data signal ; A~ pronounced A or A
NOT, is its complement.
Data A can be a 1 or a 0 or pulsing
data . Data that has been ANDED
~S§ther is represented as A • B or
• . Data that has been ORED is
represented as A+ B or A + S'.
Signal names with a • between them
is the result of ANDing , and signal
names with a + between them is the
result of ORing . A truth table is a
chart that shows all possible input
states and the resulting outputs of a
logic circuit.
The simplest logic circuit is the
inverter or NOT circuit. The output
of an inverter is always the opposite
or the complement of its input. If the
inJllit is A the output isA, if the input
isAthe output is A.
An inverter has one input and one
output that is its complement . The
circuit symbol itself is the triangle
while the circle on the output
designates the inverter (Figure One) .
The same symbol (the triangle)
without the circle would be a buffer
where the output would be the same
as the input.
The AND gate (Figure 2A) is a
multiple input device that has an
active H1 or 1 output when all the
inputs are Hi. The truth table shows
that any LO or 0 on any input will
result in a LO out, and only a H 1 on
all inputs will give a 1 out. The same
is true for an AND gate with more
than the two inputs shown . The
NAND gate (Figure 2B) output is
exactly opposite that of the AND
gate . Both inputs must be a 1 for an
active LO out. Simply it would be an
AND gate whose output goes
through an inverter.
Where the AND gate can be
represented mechanically by two
switches in series, the OR gate can be
represented by two parallel switches .
The OR gate device will have an
active Hi output when anyone of its
inputs is an active Hl. Only when
both A and B inputs are a LO will the
output be a low . The more common
NOR device again operates exactly
opposite the OR gate as can be seen
by comparing the truth tables of
Figures 2C and 2D .
AND GATE
A
=iCY-
OR GATE
i[Y-
c
NAND GATE
u~
B
I
LO
LO
HI
HI
2
LO
HI
LO
3
LO
LO
LO
HI
HI
I
2
3
LO
LO
HI
HI
LO
HI
LO
HI
HI
HI
HI
I
LO
LO
HI
HI
2
LO
3
HI
HI
HI
HI
NOR GATE
LO
LO
HI
HI
D
EXCLUSIVE OR GATE
E
~
F'lgure 2
LO
LO
HI
HI
LO
HI
LO
LO
2
3
LO
HI
LO
HI
HI
2
3
LO
HI
LO
HI
HI
HI
LO
LO
LO
LO
LO

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