Williams WPC

Note: This page is a work in progress. Please help get it to a completed state by adding any useful information to it.

1 Introduction

This guide covers Williams WPC, WPC-S, and WPC-95 games.

2 Game List

2.1 WPC (Alphanumeric)

• Funhouse
• Harley-Davidson
• The Machine: Bride of Pin*Bot

2.2 WPC (Dot Matrix)

• Gilligan's Island
• Terminator 2: Judgement Day
• Hurricane
• Party Zone

2.3 WPC Fliptronics I & II

• The Addams Family / Addams Family Gold
• The Getaway: High Speed II
• Black Rose
• Fish Tales
• Doctor Who
• Creature from the Black Lagoon
• White Water
• Bram Stoker's Dracula
• Twilight Zone

2.4 WPC DCS Sound

• Indiana Jones: The Pinball Adventure
• Judge Dredd
• Star Trek: The Next Generation
• Popeye Saves The Earth
• Demolition Man

2.5 WPC-S CPU

• World Cup Soccer
• The Flintstones
• Corvette
• Red & Ted Road Show
• The Shadow
• Dirty Harry
• Theatre of Magic
• No Fear: Dangerous Sports
• Indianapolis 500
• Johnny Mnemonic
• Jack*Bot
• WHO Dunnit

2.6 WPC-95 CPU

• Congo
• Attack from Mars
• Safecracker
• Tales of the Arabian Nights
• Scared Stiff
• Junk Yard
• NBA Fastbreak
• Medieval Madness
• Cirqus Voltaire
• No Good Gofers
• The Championship Pub
• Monster Bash
• Cactus Canyon

3 Technical Info

Motorola 68B09E, running at 2Mhz. It is an 8-bit/16-bit CPU with a 64KB address space. Bank switching is required to address more than 64KB. The game ROM size varies from 128KB to 1MB, depending on the game. 8KB of battery backed RAM is available.

For more information, see The FreeWPC Manual

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3.8 Miscellaneous WPC Boards

Note: Some of these might best be located in the "Game Specific Problems & Fixes" section. Perhaps the pervasiveness of their use within the WPC game list would drive the decision.

3.8.3 Auxiliary 8-Driver Board

as used in TZ, DM, IJ, etc...

4 Problems and Solutions

4.1 MPU boot issues

4.1.1 Relocating the battery from the MPU board

Relocating the 3xAA battery pack from the MPU board is always a good idea. Leaky alkaline batteries are the #1 killer of MPU boards. Simply removing the batteries is not an option with WPC games as you will always receive a "Factory Settings Restored" message when the game boots.

Options:

1. Remotely locate the battery holder somewhere below all other boards. This ensures that even if the remotely located batteries leak, they won't leak onto (or even drip onto) any circuit board. Replace the batteries annually, dating them with a Sharpie! as you do.
2. Replace the 6264 static RAM with a SIMTEK non-volatile RAM. These RAM chips are increasingly hard to find but offer a nice alternative to changing batteries annually. This method requires desoldering/soldering on the MPU and also has the down-side of not maintaining the Real Time Clock (meaningless in some games...nice in games like Twilight Zone that moves the playfield "toy" clock to the current time during attract mode, and Who?Dunnit which has a "Midnight Madness" feature.

4.3 Solenoid problems

Before proceeding to diagnose solenoid or flasher problems, see this section: How are coils driven?