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Bubbles

Typed in by Jonathan Deitch (jdeitch@umiami.miami.edu)

Williams Bubbles
----------------

This has four boards ... CPU/Video, ROM, Interface, Sound.


CPU/Video
=========
IJ3 : Monitor Control
7 : N/C
6 : Horiz. Sync.
5 : Vert. Sync.
4 : Ground
3 : Blue
2 : Green
1 : Red

IJ2 : Memory Protect Interlock
4 : N/C
3 : N/C
2 : Key
1 : Memory Protect (Inverted)

IJ1 : Power Input
9 : - 5 V DC
8 : + 12 V Unregulated
7 : + 5 V DC
6 : N/C
5 : + 12 V DC
4 : Key
3 : Ground
2 : Ground
1 : N/C


ROM Board
=========

2J4 : Sound Board Interface
9 : N/C
8 : CB2
7 : PB4
6 : PB5
5 : PB2
4 : PB3
3 : PB0
2 : PB1
1 : N/C

2J3 : Coin Door Switches
10 : N/C
9 : Key
8 : N/C
7 : Slam Switch
6 : Center Coin Slot
5 : Left Coin Slot
4 : High Score
3 : Right Coin Slot
2 : Advance
1 : Up = Auto, Down = Manual

2J2 : Power Input
6 : N/C
5 : N/C
4 : + 5 V DC
3 : Key
2 : N/C
1 : Ground


Interface Board
===============

3J2 : Not connected

3J3 : Player Panel
10 : Ground
9 : N/C
8 : N/C
7 : N/C
6 : Player 2 Start
5 : Player 1 Start
4 : Move Right
3 : Move Left
2 : Move Down
1 : Move Up


Sound Board
===========

10J3 : Sound Select (From ROM Board)
9 : N/C
8 : CB2
7 : PB4
6 : PB5
5 : PB2
4 : PB3
3 : PB0
2 : PB1
1 : N/C

10J4 : Volume Control
4 : Shield
3 : Key
2 : Out
1 : In

10J2 : Speakers
4 : GND
3 : N/C
2 : N/C
1 : Audio Out : Note - the schematic does not say if this is
amplified or not ...

10J1 : Power Input
9 : Key
8 : 12 V DC Unregulated
7 : N/C
6 : N/C
5 : GND
4 : N/C
3 : + 5 V DC
2 : + 12 V DC
1 : N/C



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