Dragon's Lair / Space Ace Engineering Mode

DRAGON'S LAIR / SPACE ACE ENGINEERING MODE
Written by Jeff Kulczycki - 20 March 2000

Engineering mode was designed to let the engineers play-test a scene without having to play through the whole game.
This document will show you how to get into engineering mode and how to use it.

When the engineering mode is enabled, one of the DIP switch banks on the game's main PCB will
allow the selection of which scene to play, according to the charts below.

NOTE: All DIP switches discussed in this document must be switched while the game's power is turned off!

NOTE: All DIP switches are numbered from 0-7, as printed in white on the main PCB (not 1-8 on the plastic switch banks.)

Dragon's Lair's engineering mode is activated by turning DIP switch A3 OFF while the power is off.
That much is documented in the manual, but the following details are not.
Use DIP switch bank B to select the scene to play, per the chart below.
The attract mode will begin normally. Insert coins (if not set to free play) and press start.
The game will jump immediately to the selected scene. The only way to exit engineering mode
is to turn off the game and reset the DIP switches.

With the Dragon's Lair revision F and F2 ROMs, you will have a problem using engineering mode.
These ROM revisions assign DIP switch B3 to select which laserdisc player model is being used,
and this curtails your ability to use switch B3 to make your scene choice. Without changing your
laserdisc player setup, you have to leave B3 set to its working position.

B7	B6	B5	B4	B3	B2	B1	B0	Scene
ON	ON	ON	ON	ON	ON	ON	OFF	Tentacles & Halberd
ON	ON	ON	ON	ON	ON	OFF	ON	Mist Room (snakes)
ON	ON	ON	ON	ON	ON	OFF	OFF	Fire Pit (ropes)
ON	ON	ON	ON	ON	OFF	ON	ON	Yellow Brick Road (pool of water / spider)
ON	ON	ON	ON	ON	OFF	ON	OFF	Wizard's Chamber (Acid Creature / Cauldron Wizard)
ON	ON	ON	ON	ON	OFF	OFF	ON	Spiral Staircase (Giddy Goons)
ON	ON	ON	ON	ON	OFF	OFF	OFF	YMCA Room (flattening stairs)
ON	ON	ON	ON	OFF	ON	ON	ON	Forge (Smithee)
ON	ON	ON	ON	OFF	ON	ON	OFF	Socker Boppers (Grim Reaper)
ON	ON	ON	OFF	ON	ON	ON	ON	Breathing Door (wind room)
ON	ON	ON	OFF	ON	ON	ON	OFF	Bower (closing wall)
ON	ON	ON	OFF	ON	ON	OFF	ON	Fire Room (lightning / bench over exit)
ON	ON	ON	OFF	ON	ON	OFF	OFF	Flying Barding
ON	ON	ON	OFF	ON	OFF	ON	ON	Chapel (Robot Knight / checkered floor)
ON	ON	ON	OFF	ON	OFF	ON	OFF	Mausoleum (Crypt Creeps)
ON	ON	ON	OFF	ON	OFF	OFF	ON	Catwalk (bats)
ON	ON	ON	OFF	ON	OFF	OFF	OFF	Fire Pit (ropes) (reversed)
ON	ON	ON	OFF	OFF	ON	ON	ON	Yellow Brick Road (pool of water / spider) (reversed)
ON	ON	ON	OFF	OFF	ON	ON	OFF	Giant Bat
B7	B6	B5	B4	B3	B2	B1	B0	Scene
ON	ON	OFF	ON	ON	ON	ON	ON	Elevator Floor (9 levels available)
ON	ON	OFF	ON	ON	ON	ON	OFF	Forge (Smithee) (reversed)
ON	ON	OFF	ON	ON	ON	OFF	ON	Flying Barding (reversed)
ON	ON	OFF	ON	ON	ON	OFF	OFF	Pot of Gold (Lizard King)
ON	ON	OFF	ON	ON	OFF	ON	ON	Wizard's Kitchen ("Drink Me")
ON	ON	OFF	ON	ON	OFF	ON	OFF	Mausoleum (Crypt Creeps) (reversed)
ON	ON	OFF	ON	ON	OFF	OFF	ON	Socker Boppers (Grim Reaper) (reversed)
ON	ON	OFF	ON	ON	OFF	OFF	OFF	Tilting Room
ON	ON	OFF	ON	OFF	ON	ON	ON	Throne Room
ON	ON	OFF	ON	OFF	ON	ON	OFF	Chapel (Robot Knight / checkered floor) (reversed)
ON	ON	OFF	OFF	ON	ON	ON	ON	Elevator Floor (9 levels available) (reversed)
ON	ON	OFF	OFF	ON	ON	ON	OFF	Pirates of the Caribbean (underground river)
ON	ON	OFF	OFF	ON	ON	OFF	ON	Mudmen
ON	ON	OFF	OFF	ON	ON	OFF	OFF	Knight & Light (Black Knight / horse)
ON	ON	OFF	OFF	ON	OFF	ON	ON	Boulder Trench (colored balls)
ON	ON	OFF	OFF	ON	OFF	ON	OFF	Three Caves (jagged door / geyser)
ON	ON	OFF	OFF	ON	OFF	OFF	ON	Dragon's Lair
ON	ON	OFF	OFF	OFF	ON	ON	ON	Elevator Floor (3 levels available)
ON	ON	OFF	OFF	OFF	ON	ON	OFF	Vestibule (small crumbling room)
B7	B6	B5	B4	B3	B2	B1	B0	Scene

Space Ace's engineering mode is activated by turning DIP switch B3 ON while the power is off.
This function is not documented in the manual, which marks switch B3 as "Not used."
Use DIP switch bank A to select the scene to play, per the chart below. Because of Space Ace's style of game play, the scene may not always start over at the beginning.
You will not have the problem with the laserdisc player selection mentioned above with the Dragon's Lair revision F/F2 ROMs, because Space Ace uses DIP switch B0 for player selection.
To exit engineering mode, turn off the game and reset the DIP switches.

A7	A6	A5	A4	A3	A2	A1	A0	Scene
ON	ON	ON	ON	ON	ON	ON	ON	Attract Mode
ON	ON	ON	ON	ON	ON	ON	OFF	"There's Borf's Ship"
ON	ON	ON	ON	ON	ON	OFF	ON	First Flight: Asteroids
ON	ON	ON	ON	ON	ON	OFF	OFF	First Flight: Asteroids (reversed)
ON	ON	ON	ON	ON	OFF	ON	ON	Space Station: Power Cylinders / Video Guards
ON	ON	ON	ON	ON	OFF	ON	OFF	Space Station: Power Cylinders / Video Guards (reversed)
ON	ON	ON	ON	ON	OFF	OFF	ON	Space Station: Security Spheres
ON	ON	ON	ON	ON	OFF	OFF	OFF	Space Station: Security Spheres (reversed)
ON	ON	ON	ON	OFF	ON	ON	ON	Space Station: Space Pups / Robots
ON	ON	ON	ON	OFF	ON	ON	OFF	Space Station: Space Pups / Robots (reversed)
ON	ON	ON	OFF	ON	ON	ON	ON	Space Station: Trash Masher
ON	ON	ON	OFF	ON	ON	ON	OFF	Space Station: Trash Masher (reversed)
ON	ON	ON	OFF	ON	ON	OFF	ON	Second Flight: Dogfight
ON	ON	ON	OFF	ON	ON	OFF	OFF	Second Flight: Dogfight (reversed)
ON	ON	ON	OFF	ON	OFF	ON	ON	Speed Tunnel: Le Grins
ON	ON	ON	OFF	ON	OFF	ON	OFF	Speed Tunnel: Le Grins (reversed)
A7	A6	A5	A4	A3	A2	A1	A0	Scene
ON	ON	ON	OFF	ON	OFF	OFF	ON	Shag's Jungle
ON	ON	ON	OFF	ON	OFF	OFF	OFF	Shag's Jungle (reversed)
ON	ON	ON	OFF	OFF	ON	ON	ON	Hexter
ON	ON	ON	OFF	OFF	ON	ON	OFF	Hexter (reversed)
ON	ON	OFF	ON	ON	ON	ON	ON	Motorcycle Chase
ON	ON	OFF	ON	ON	ON	ON	OFF	Motorcycle Chase (reversed)
ON	ON	OFF	ON	ON	ON	OFF	ON	Maze of Madness / Water Tank
ON	ON	OFF	ON	ON	ON	OFF	OFF	Maze of Madness / Water Tank (reversed)
ON	ON	OFF	ON	ON	OFF	ON	ON	Final Battle with Borf
ON	ON	OFF	ON	ON	OFF	ON	OFF	"Which Way?"
ON	ON	OFF	ON	ON	OFF	OFF	ON	"Which Way?" (alternate)
ON	ON	OFF	ON	ON	OFF	OFF	OFF	First Flight: Asteroids (shortened) (no Dexter/Kimmy banter)*
ON	ON	OFF	ON	OFF	ON	ON	ON	First Flight: Asteroids (shortened) (reversed)*
ON	ON	OFF	ON	OFF	ON	ON	OFF	Space Station: Security Spheres (shortened) (1st sphere cut)*
ON	ON	OFF	OFF	ON	ON	ON	ON	Space Station: Security Spheres (shortened) (reversed)*
ON	ON	OFF	OFF	ON	ON	ON	OFF	~~Maze of Madness~~ / Water Tank (shortened) (no maze)*
ON	ON	OFF	OFF	ON	ON	OFF	ON	~~Maze of Madness~~ / Water Tank (shortened) (reversed)*
A7	A6	A5	A4	A3	A2	A1	A0	Scene