Merlin-Jr Multi-Game ROM set

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Software and Design by Shaun Wood - June 2026

Introduction
Merlin-Jr is a multigame ROM set for Dragon's Lair and Space Ace arcade machines.
It allows you to play Dragon's Lair, Dragon's Lair II, and Space Ace, in your original arcade machine.

Merlin-Jr must be used with the Dexter laserdisc replacement player.

Merlin-Jr requires a hardware modification of the upper ROM board for the use of larger (27C256) EPROMS.



Download the Merlin-Jr V1.0 ROM set

Parts
5 - 27c256 EPROMs - Programmed with the Merlin-Jr binaries from the above download package.
A bit of wire
Soldering skill and tools.



Procedure
Remove the upper ROM board from your Dragon's Lair or Space Ace boardset.
Remove the existing EPROM chips.

On the backside, locate the circuit bridge connecting pins 27 & 28 for each EPROM...



Cut out the small bit of circuit between the pins...
      Before                                                                                                     After
 

Repeat for all five EPROM sockets (U1 - U5).


Take note of the 4 solder points in a vertical stack on the left side of the board.
Solder a jumper wire connecting pin-27 on all five EPROMs to the 3rd solder point down...



Solder a jumper wire connecting pin-26 on all five EPROMs to the 4th solder point down...



Board modification is complete.

Install your new Merlin-Jr EPROM set



Reassemble the board. Set dip-switches according to the included settings charts, and enjoy the game!

DISCLAIMER OF LIABILITY
If you proceed to modify your equipment, you are doing so at your own risk and you accept full and sole responsibility for the results.
LaserCon makes no warranty or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any
information found in this document. Use at your own risk.