Star Tech Journal
Issue: 1981-December - Vol 3 Issue 10 - Page 18
S*TJ DECEMBER 1981 18
EXIDY
MONITOR
* ADJUSTMENT *
PROCEDURE
To Freeze Picture For Monitor Adjustment
If you have to adjust the color on your
monitor or make other adjustments, you
may wish to "freeze" the picture. The
easiest way to do this is to activate one
of the coin switches. While the switch is
activated, the picture will "freeze" on
the screen, and as long as you hold down
the coin switch it will remain frozen.
Another way of doing this is to jump
the switch terminals together or remove
either of the wires and place it on the
empty terminal. Do your adjustments
and then disengage your coin switch.
COIN DOOR
- 0
0
0
0
'---
0
0
COIN SWITCH
SWITCH TERMINALS
Checking Voltages on Exidy "Venture"
One of the first things
to check when you have
a problem is your
voltage. A good place
to check for all your
voltages is at the con-
nector P-5 on the
Audio/Color board.
The voltages should be
shown at right with
connector connected to
the audio/color board.
P-5
1
GND
2
+12vdcHI
-12vdc HI
-12vdc LO
-5vdc
+ 12vdc LO
SPKR(A)
3
4
5
6
7
+5vdc
SPKR(B)
8
9
10
11
12
13
14
15
EXIDY
The traces on the audio color board
connect 2 pins each from the connector
so that you have the same voltages at:
pin 1 & 15
gnd
2& 14
+ 12vdc HI
3 & 13
-12vdc HI
4 & 12
-12vdc LO
5 & 11
-5vdc
6 & 10
+ 12vdc LO
7 & 9
Speaker (A) and (B)
8
+ 5vdc
l
* "MOUSETRAP" * SPECIAL * DEVICE * NOTES
Exidy "Mousetrap": Microprocessor On Logic Board
"Mousetrap" uses two microprocessors on the
audio board (a 6502 and a Z-80) and one
microprocessor on the logic board (a 6502A).
The logic board must use a 6502A otherwise
it will not operate correctly. On the audio
board any 6502 will suffice.
Example:
2114-25
Exidy "Mousetrap": 2114 Logic Rams
The logic board on "Mousetrap" uses (8) 2114
RAMs. The speed of these RAMs must be
300 nanoseconds or less or the system will
not operate correctly. The way to identify how
fast these are is to look at the number
following the 2114 marking.
2114-25 means the speed of this RAM is
250 nanoseconds.
If you have any questions concerning this
information, call Exidy Customer Service at
(800) 538-8402 or (408) 734-9410.
COURTESY OF EXIDY'S TECHNICAL NEWSLETTER " ZERO DOWNTIME"
EXIDY
MONITOR
* ADJUSTMENT *
PROCEDURE
To Freeze Picture For Monitor Adjustment
If you have to adjust the color on your
monitor or make other adjustments, you
may wish to "freeze" the picture. The
easiest way to do this is to activate one
of the coin switches. While the switch is
activated, the picture will "freeze" on
the screen, and as long as you hold down
the coin switch it will remain frozen.
Another way of doing this is to jump
the switch terminals together or remove
either of the wires and place it on the
empty terminal. Do your adjustments
and then disengage your coin switch.
COIN DOOR
- 0
0
0
0
'---
0
0
COIN SWITCH
SWITCH TERMINALS
Checking Voltages on Exidy "Venture"
One of the first things
to check when you have
a problem is your
voltage. A good place
to check for all your
voltages is at the con-
nector P-5 on the
Audio/Color board.
The voltages should be
shown at right with
connector connected to
the audio/color board.
P-5
1
GND
2
+12vdcHI
-12vdc HI
-12vdc LO
-5vdc
+ 12vdc LO
SPKR(A)
3
4
5
6
7
+5vdc
SPKR(B)
8
9
10
11
12
13
14
15
EXIDY
The traces on the audio color board
connect 2 pins each from the connector
so that you have the same voltages at:
pin 1 & 15
gnd
2& 14
+ 12vdc HI
3 & 13
-12vdc HI
4 & 12
-12vdc LO
5 & 11
-5vdc
6 & 10
+ 12vdc LO
7 & 9
Speaker (A) and (B)
8
+ 5vdc
l
* "MOUSETRAP" * SPECIAL * DEVICE * NOTES
Exidy "Mousetrap": Microprocessor On Logic Board
"Mousetrap" uses two microprocessors on the
audio board (a 6502 and a Z-80) and one
microprocessor on the logic board (a 6502A).
The logic board must use a 6502A otherwise
it will not operate correctly. On the audio
board any 6502 will suffice.
Example:
2114-25
Exidy "Mousetrap": 2114 Logic Rams
The logic board on "Mousetrap" uses (8) 2114
RAMs. The speed of these RAMs must be
300 nanoseconds or less or the system will
not operate correctly. The way to identify how
fast these are is to look at the number
following the 2114 marking.
2114-25 means the speed of this RAM is
250 nanoseconds.
If you have any questions concerning this
information, call Exidy Customer Service at
(800) 538-8402 or (408) 734-9410.
COURTESY OF EXIDY'S TECHNICAL NEWSLETTER " ZERO DOWNTIME"
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