S
* T J FEBRUARY 1982 10
EXIDY "MOUSETRAP"
A Regular Monthly Feature Technically Outlining A Newly Released Game
General System Description
For the first time, the entire electronics assembly, including PCBs and
power circuits, slide out through the Electronics Service Door to allow
technicians to work while boards are installed in the game. By releasing a
catch, the entire electronics module may be taken to a bench for trouble-
shooting. Other features in the Electronic Service Door include an
accessible DIP switch, a power interlock switch, and simple I 10 or 220
conversion.
Access to the Coin Box is controlled by a separate key. The Oversize Coin
Box is enclosed in a strong, solid metal box, preventing access through any
other door.
The Coin.Mech Door requires a separate key and has lit coin entry bezels.
The Coin Mech accepts all standard coins and may be adjusted for tokens.
Coin Meters are mounted on a separate bracket for easy reading. Through
this door, latches for the control panel can be released, allowing the control
panel to swing down for service. Additionally, the monitor can be removed
from the front of the game.
Route Operator Features include two large, heavy-duty casters which, on
pivot, support the full weight of the game for one-man ease of transportation.
Two hand holds provide a secure grip. Two skid ·rails permit the game to
slide onto a truck bed and are spaced to line up in truck bed groves providing
stability during transport. A recessed AC cord storage prevents damage to
the cord.
Game Logic Board (77-3391)
VOLTAGE INPUTS
+5VDC (Jl-R thru Jl-V)
GND (Jl-10 thru Jl-21)
+I2VDC (LO) (Jl-M)
-5VDC (Jl-N)
CONTROL INPUTS
4 Way Down
Fire (Dog)
4 Way Right
One Plyr Start
Coin GND
Audio GND
Power Supply GND
Control Panel GND
Coin
4 Way Up
4 Way Left
2 Plyr Start
Coin 2 (Aux)
Anti-Slam
Anti-Static
Jl-5
Jl-6
Jl-7
11-8
Jl-10
Jl-11
Jl-12
Jl-13
Jl-E
Jl-F
Jl-H
Jl -1
Jl-Y
Jl-L
JI-A
CONTROL OUTPUTS
11-3
Plyr I IND
Jl-4
Plyr 2 IND
MISC. TECHNICAL INFO (LOGIC PCB)
6502A CPU (LOC 2A)
11.289 MHZ XT AL
Rams are 2114 (l024x4 £ 300ns)
2 Screen Rams (LOC 7B , SB)
4 Image Storage Rams (LOC llC, 12C, 13C, 14C)
2 Page Zero, One & Scratch Pad (LOC 4A, 5A)
Program Roms (8) (LOC 6A, 7 A, SA, 9A, 1 0A, I IA , 12A, 13A)
Video Output to Audio/Color PCB ( 14 PIN DIP Socket at LOC 16B) J 4
Control Input Port/74LS241 (LOC 9E)
Audio Board Port/74LS245 (LOC 15B)
Peripheral Control Latch/74LS374 (LOC 9D)
Audio/Color Board (77-3392)
VOLTAGE INPUTS
Logic GND
+ l2VDC (HI)
-l2VDC (HI)
-I2VDC (LO)
-5VDC
+I2VDC (LO)
+5VDC
REG PCB GND
15-1
15-2
15-3
15-4
15-5
15-6
15-8
15-15
CONTROL INPUTS
YEL Gate
RED Gate
BLU Gate
14-1
14-2
14-4
OUTPUTS
SPKRA
SPKRB
J5-7
J5-9
Video GND
V Sync
H Sync
BLU Data
GRN Data
RED Data
121-7
121-6
121-5
121-3
121-2
121-l
MISC. TECHNICAL INFO (AUDIO/COLOR PCB)
6502 CPU (LOC B4)
Program Memory (LOC A3, A4, AS, A6, A 7)
3.579545 MHZ XTAL
280 CPU (LOC DI)
Memory (LOC D2, D3, D4, D5)
Control lnput/74LSI25 (LOC A9)
Video Output to Monitor/74LS174 (LOC 13A)
Audio Output (Ql-TIP120/Q2-TIP125 Both Heat Sinked)°
Audio Adjustments - Dog Volume Pot, Music Volume Pot, Special Effects
Volume Pot, Master Volume Pot
MISC. CONNECTIONS (AUDIO/COLOR-LOGIC)
Audio/Color PCB J2 (IO PIN) to Logic PCB P2
Audio/Color PCB J3 ( 10 PIN) to Logic PCB P3
Audio/Color (14 Pin Dip Socket) J20 from Logic PCB 14
Power Supply Outputs
+5VDC
P27-l , 2
GND
P27-3 , 4
Only the 5VDC Supply is adjustable. Measure on the Logic PCB and
adjust Power Supply +5V Pot to read +5.0 VDC ± .25V
REGULATOR BOARD OUTPUTS
19-1 , 11, 12
GND
19-2
+ 12VDC (HI)
19-3
+ 12VDC (LO)
19-5
-12VDC (LO)
19-6
-12VDC (HI)
19-10
+ I2VDC (COIN)