The
system1 MPU DIP switches
A) introduction:
You can find these DIP switches in the upper middle of the sys1 MPU. There are 24 switches, that are devided into 3 components with 8 switches each. The function of the switches is listed below. From my point of view, Gottlieb did not know, what to do with the DIPs. Most of the functions are really stupid except maybe the coin/credit combination.
B) switch 1 to 4:
These four switches control coin chute 1.
|
switch
1
|
switch
2
|
switch
3
|
switch
4
|
credit
/ coin
|
|
OFF
|
OFF
|
OFF
|
OFF
|
1/1
|
|
OFF
|
OFF
|
OFF
|
ON
|
2/1
|
|
OFF
|
OFF
|
ON
|
OFF
|
3/1
|
|
OFF
|
OFF
|
ON
|
ON
|
4/1
|
|
OFF
|
ON
|
OFF
|
OFF
|
5/1
|
|
OFF
|
ON
|
OFF
|
ON
|
6/1
|
|
OFF
|
ON
|
ON
|
OFF
|
7/1
|
|
OFF
|
ON
|
ON
|
ON
|
8/1
|
|
ON
|
OFF
|
OFF
|
OFF
|
9/1
|
|
ON
|
OFF
|
OFF
|
ON
|
1/2
|
|
ON
|
OFF
|
ON
|
OFF
|
2/2
|
|
ON
|
OFF
|
ON
|
ON
|
3/2
|
|
ON
|
ON
|
OFF
|
OFF
|
4/2
|
|
ON
|
ON
|
OFF
|
ON
|
5/2
|
|
ON
|
ON
|
ON
|
OFF
|
3/2*
|
|
ON
|
ON
|
ON
|
ON
|
1/3
|
|
*1st
coin = 1 credit, 2nd coin = 2 credits
|
||||
C) switch 5 to 8:
These four switches control coin chute 1.
|
switch
5
|
switch
6
|
switch
7
|
switch
8
|
credit
/ coin
|
|
OFF
|
OFF
|
OFF
|
OFF
|
1/1
|
|
OFF
|
OFF
|
OFF
|
ON
|
2/1
|
|
OFF
|
OFF
|
ON
|
OFF
|
3/1
|
|
OFF
|
OFF
|
ON
|
ON
|
4/1
|
|
OFF
|
ON
|
OFF
|
OFF
|
5/1
|
|
OFF
|
ON
|
OFF
|
ON
|
6/1
|
|
OFF
|
ON
|
ON
|
OFF
|
7/1
|
|
OFF
|
ON
|
ON
|
ON
|
8/1
|
|
ON
|
OFF
|
OFF
|
OFF
|
9/1
|
|
ON
|
OFF
|
OFF
|
ON
|
1/2
|
|
ON
|
OFF
|
ON
|
OFF
|
2/2
|
|
ON
|
OFF
|
ON
|
ON
|
3/2
|
|
ON
|
ON
|
OFF
|
OFF
|
4/2
|
|
ON
|
ON
|
OFF
|
ON
|
5/2
|
|
ON
|
ON
|
ON
|
OFF
|
3/2*
|
|
ON
|
ON
|
ON
|
ON
|
1/3
|
|
*1st
coin = 1 credit, 2nd coin = 2 credits
|
||||
D) switch 9 to 16:
|
switch
|
position
|
function
|
|
9
|
ON
|
3
balls per game
|
|
OFF
|
5
balls per game
|
|
|
10
|
ON
|
match
feature
|
|
OFF
|
no
match feature
|
|
|
11
|
ON
|
beating
high score to date: replay
|
|
OFF
|
extra
ball, switches 10 and 22 are disabled
|
|
|
12
|
ON
|
Tilt
effect: ball in play
|
|
OFF
|
Tilt
effect: game over
|
|
|
13
|
ON
|
credits
displayed in credit display
|
|
OFF
|
no
credits are displayed
|
|
|
14
|
ON
|
credit
button tune on
|
|
OFF
|
credit
button tune off
|
|
|
15
|
ON
|
not
used
|
|
OFF
|
not
used
|
|
|
16
|
ON
|
not
used
|
|
OFF
|
not
used
|
E) switch 17 and 18:
|
switch
17
|
switch
18
|
maximum
credits
|
|
OFF
|
OFF
|
5
|
|
OFF
|
ON
|
8
|
|
ON
|
OFF
|
10
|
|
ON
|
ON
|
15
|
F) switch 19 to 24:
|
switch
|
position
|
function
|
|
19
|
ON
|
coin
chute is also controlled with switch 1-4
|
|
OFF
|
2.
coin cute controlled separate
|
|
|
20
|
ON
|
tones
when scoreing on
|
|
OFF
|
tones
when scoreing off
|
|
|
21
|
ON
|
high
score to date is displayed
|
|
OFF
|
high
score to date does not appear in displays
|
|
|
22
|
ON
|
beating
high score to date = 3 replays
|
|
OFF
|
beating
high score to date = 0 replays
|
|
|
23
|
ON
|
coin
switch tune on
|
|
OFF
|
coin
switch tune off
|
|
|
24
|
ON
|
not
used
|
|
OFF
|
not
used
|
