Defender
From Williams Arcades Wiki
More actions
Released - 1981
Upright Cabinet
- Overall Dimensions/Weight
| Height | Width | Depth | Weight |
|---|---|---|---|
| 72" | 26" | 32.5" (32 1/2") | 265 lbs. |
- Marquee Information
| Height | Width |
|---|---|
| 7.75" (7 3/4") | 24.375" (24 3/8") |
- Control Panel Information
Joystick: 2-way - Leaf Switch (up, down) Buttons: 5 Fire-Thrust-Reverse-Hyperspace-Smart Bomb
Cocktail Cabinet
- Overall Dimensions/Weight
Documentation
Drawings/Schematics
Early Drawings
Later Drawings
- Front Cover
- Table Of Contents
- Board Layout Diagram 1
- Board Layout Diagram 2
- MPU Layout Diagram 1 (R8570)
- MPU Layout Diagram 2 (Parts List) (R8570)
- MPU Schematic/Logic 1 (R8570)
- MPU Schematic/Logic 2 (R8570)
- Interface/Widget Board (C8573)
- ROM Board Layout Diagram (D8572)
- ROM Board Schematic (D8572)
- Power Supply Diagram (D8359)
- Power Supply Schematic (D8359)
- Cabinet Power Schematic
- Power Board Diagram (D8373)
- Early Sound Board Diagram/Layout (D8121)
- Early Sound Board Schematic (D8121)
- Later Sound Board Diagram/Layout (D8224)
- Later Sound Board Schematic (D8224)
- Manual Stored Here
- Parts Catalog Stored Here
Boards
ROM Board
Interface Board (I/O, Widget)
Description: The interface board is used to provide input ports that allow the physical connection of user inputs from the Control Panel. This board uses a 6821 PIA (peripheral interface adapter) that digitizes all inputs and provides to the MPU board when requested.
- Jumpers W1 and W2
- W1
- Is used to identify to the system if the game is an Upright or Cocktail
- W1 Removed - Cocktail Game - Screen Flip and unique controls (+5v Pull-Up resistor to PIA)
- W1 Installed - Upright Game - 2 Players share same controls, no screen flip (Connects PIA input to Ground)
- Notes: Green Rom Version has no support for Cocktail Mode
- W2
- Is used to allow the program to enable or disable the Multiplexers (Muxers)
- W2 should always be connected there is no reason to remove jumper
- Inputs
- 16 inputs are possible with the Defender Interface board - (20 pins, 2 are Ground, 2 are cut as keys to prevent the wrong connector from being installed)
- Upright (Green and Red ROM Versions)
- 3J3 Connector (Lower closest to ribbon cable - Pin 1 is lowest)
- Upright (Green and Red ROM Versions)