Braze Technologies
Innovative solutions for the "classic" arcade collector

Space Invaders Multigame Kit
"Space Invaders Multigame" is an easy to install kit that extends your Midway Space Invaders or Midway Space Invaders Deluxe boardset to play 8 games.

  • Space Invaders
  • Space Invaders Deluxe
  • Jatre Specter
  • Lunar Rescue
  • Space Laser
  • Balloon Bomber
  • Galaxy Wars *
  • Super Earth Invasion

Plus many extras features such as Free Play, High Score Save, powerup Diagnostics, on-screen configuration Settings, and a interactive testmode.

Space Invaders Multigame Kit

Kit installs in minutes! No soldering or special skills needed. No special wiring or switches are needed! Switch between games by simply pressing both the player-1 and player-2 start buttons at the same time. A game selection menu will appear.

Includes on-screen game configuration settings and high score save for all games.

This is must have for any Space Invaders owner!

Only $59. To order, call 1-800-514-9506

Space Invaders
Space Invaders Deluxe
Selection Menu
* Galaxy Wars does not support free play at this time.


Easy Installation. Kit installs in just minutes on your Space Invaders board, no soldering required.

Switch between games by simply pressing and holding both Player 1 and Player 2 start buttons at the same time. A menu will appear with a game selection.

An on-screen setup menu allows for configuration changes for all games which eliminates the need for dip switches.

High Scores and names (if applicable) are saved.

Free Play. No coins needed, nor the need to open your coin door to add credits. Attract mode is functional while in free play mode.

Power on self test diagnosis game hardware. See Power on Self Test below for details.

Test mode allows for running additional tests and diagnostics such as monitor patterns, RAM and switch tests.

Space Invaders Multigame Installation Guide

Step 0: Make sure your Space Invaders game is fully working

Before installing this kit, make sure your Space Invaders game is fully functional. This kit can only work in a fully functional game. This kit only works on the Midway/Bally black and white style of space invaders which has the L-shaped board set.

Click images for a larger view

Motherboard CPU location

Motherboard CPU removed

Step 1: Turn off power to the game

While it may be possible to install this kit without removing your board from its cabinet, you may find it easier to install the kit if you do remove the board. In that case, pay careful attention (or label), any wire connections as you disconnect your board so that you can correctly reconnect the game board set afterwards. Take note of which side of the edge connectors are facing the parts side of the board and which sides face the solder side, It is possible the connectors may not me keyed and can be inadvertently plugged in backwards - ouch! It is recommended that you label the connectors face with something like "parts side" or "solder side".

Step 2: Remove the L-shaped game board set from the cabinet

For the upright, the game board set is usually attached to the right side of the cabinet (as viewed from the back). Refer to your game manual for additional information about locating and removing the game board set. See also the pictures in step 0.

Step 3: On the Motherboard, locate and remove the 8080 CPU chip

Locate and remove the 8080 CPU chip on the board. Use the images below to assist in locating it. The 8080 CPU chip is a 40 pin (large) chip, located in Row 2 There are three 40 pin chips in a cluster near the corner of the board. Remove only the 8080 CPU. Use the photos as a guide to help locate the chip. Remove the chip gently by using a flat head screwdriver or an IC remover to pry it out of its socket from each end. Some of the board sets may have open frame sockets which do not protect the PCB traces. Be careful not to scratch any of the PCB traces underneath the socket. Also be careful not to bend any of the pins. If any pins do get inadvertently bent, you will need to straighten them out before the next step. Needle nose pliers work well for this.

Click images for a larger view

Motherboard CPU location
Motherboard 8080 CPU location

Motherboard CPU removed
Motherboard with 8080 CPU Removed

Step 4: Insert the 8080 CPU into the kit daughter card

Insert the just removed 8080 CPU chip into the empty 40 pin socket on the kit daughter card. Make sure pin-1 is correctly oriented. Pin-1 is usually indicated on the 8080 CPU chip by some type of indentation or circle molded into the plastic. Pin-1 on the daughter card is marked by a large "1" on the PCB, as well the with the text "8080".
If the 8080 chip is installed backwards it will cause permanent damage to the 8080 chip.

Pin-1 Identification
Click images for a larger view

Invaders Kit
Invaders Multigame kit

Kit with 8080 installed
Kit with 8080 installed

Pin-1 Closeup
Pin-1 Identification

Step 5: Insert the daughter card into the board

Insert the daughter card back into the 8080 CPU socket on the board where the 8080 CPU chip was originally removed from. Again, make sure pin-1 of the 8080/daughter card is oriented to correctly match pin-1 on the board. Use the photos as a guide. The gold machined pins on the daughter can bend very easily, make sure they are all straight and that each pin is inserted in the motherboard socket.

Click images for a larger view

Multikit installed

Multikit installed

Step 6: Double check your work

Review the previous steps double checking that 8080 CPU is properly installed into the daughter card with no bent pins and that it is correctly oriented for pin-1. And that the daughter card is also installed snug into the 8080 CPU socket at Row 2 with pin-1 matched up.
REPEAT: If any of these devices are installed backwards it may cause permanent damage to the kit and your board!

kit Installed
Click image for larger view

Step 7: Reinstall game board set into cabinet and Power up

Reinstall your Invaders board set into the cabinet, re-hookup the edge connectors with the original orientation. Then power up your game. If the game does not come up, turn power off immediately, double check your work, and read over the trouble shooting section.

Step 8: Verify Multigame functionality

When the game powers up, it first runs a built in self test and attempts to display the results on the screen. The default behavior when you first install the kit is for the game to remain in boot mode for 10 seconds. You should see a screen that looks similar to this:

Three options are available at this point. If no option is selected before the timeout expires the game will transition into game play mode automatically.

  1. Enter setup mode (p1-start)

  2. Enter test mode (p2-start)

  3. Enter game play mode (fire)

Now is a good time to configure your desired game settings via the setup menu. Press p1-start to enter setup mode. Note: The setup menu allows you to configure your bootup preference.

Once in setup mode, verify the settings displayed are the ones desired. To change a setting, use the left and right buttons to move up and down to select the setting to be changed. The selected setting is indicated by an invader icon on the left. Once selected, use the fire button to toggle though the available combinations. When done making changes to settings, be sure to select "SAVE AND EXIT". At this time the game will transition into game play mode.

The new settings should now be active.

As a side note, if you want, you can also remove the old code EPROMs/ROMs. These are located at the edge of the board near the 8080 CPU location.

Space Invaders Multigame – Power up Self test

When the game first powers up, it performs a series of self test diagnostics to insure the game is operating properly. This kit can also be a useful tool for debugging broken board sets.

The first thing the kit does is in an internal checksum of the code EPROM which is contained on the kit. If the checksum fails, the kit cannot continue. It will attempt to display a ROM checksum failure message on the screen and after a few seconds, the game will reset because of the watchdog reset circuit will repeat the power up self test. A EPROM checksum failure usually indicates a problem with the kit itself.

After the EPROM checksum test passes, the kit performs an extensive Dynamic RAM test. The test writes various patterns (accounting for aliasing), with various hold times to increase the DRAM coverage. If the ram test fails, the diagnostic then performs additional testing to narrow down and isolate the suspected failed ram chips. During the memory test, you may see patterns on the screen that look similar to those below

If the memory test passes (normal case), the self test will continue on to other hardware tests.

If the memory test fails, the software will pulse out a series of sounds indicating the FIRST bad RAM chip location. This is very similar to how Atari self tests function. That is, the number of "beeps" indicate the first suspected chip. That chip then needs to be replaced, and then the test rerun to identify any other faulty chips. Again, this test only indicates one chip failure at a time. It should be noted that these types of memory tests are not a 100% guarantee that the identified chip is indeed wrong. In some cases the problem can also be broken traces on the board set, or problems with other chips (e.g., drivers, buffers, etc...). So use it as a guide.

When the memory test fails, a few seconds later after the chip code has been pulsed out, the game will reset because of the watchdog reset circuit and the power up self test will repeat. The table below is used to map the number of "beeps" (missile shot sounds) to the suspected bad memory chip.