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Intel 8080 Space Invaders Emulator

An Emulator for The Original 1978 Space Invaders Arcade Machine. Written in C using SDL2 for renderering and imgui for a GUI. The emulator is capable of runnning a few different arcade machines: Space Invaders, Lunar Rescue, Balloon Bomber, Space Invaders pt2, Space Laser and Space Chaser

Space Invaders - invaders.zip Lunar Rescue - lrescue.zip Balloon Bomber - ballbomb.zip
invaders_470_540 lrescue_470_540 ballbomb_470_540
Space Invaders Pt2 - invadpt2.zip Space Laser - spclaser.zip Space Chaser - schaser.zip
invaderspt2_470_540 space_laser_470_540 schaser_470_540

Input

Both player 1 and player 2 controls are mapped to the same keys.

Key Desc
1 Player one start
2 Player two start
Space Fire
Left Arrow Left
Right Arrow Right
3 / C Insert Coin
Esc Toggle Main Menu
F11 Full Screen
P Pause/Unpause
I Spawn Space Ship
U Kill Space Ship
F5 Save Machine State
F9 Load Machine State

A Windows binary is available for download on the releases page. See: Releases

How to use

This project uses the same names for the roms as the MAME project. Roms are loaded from a directory named after their MAME name. eg.

 Space-Invaders.exe

 invaders\
         | - invaders.e
         | - invaders.f
         | - invaders.g
         | - invaders.h

 lrescue\
         | - lrescue.1
         | - lrescue.2
         | - lrescue.3
         | - lrescue.4
         | - lrescue.5
         | - lrescue.6

Changing ROMSETS:

1.) Open the menu using Esc

2.) Select the drop down menu and choose a romset.

Screenshot 2025-02-05 205313

Building

The project is built in Visual Studio 2022

Dependencies

  1. Clone the repo
git clone https://github.com/tommojphillips/Space-Invaders.git
  1. CD to lib/ dir
cd Space-Invaders/lib
  1. Clone imgui into lib/ dir
git clone --depth 1 --branch v1.91.6 https://github.com/ocornut/imgui.git
  1. Clone imgui-club into lib/ dir
git clone https://github.com/ocornut/imgui_club.git

  1. Download SDL2 VC package SDL2-devel-X.X.X-VC.zip (direct download link)

    • Extract and copy the include and lib folders into Space-Invaders/lib/SDL2 you will have to create the SDL2 directory

  2. Open vc\Space-Invaders.sln in visual studio and build and run

The project directory structure should look like this:

Space-Invaders\
      | -- lib\
      |        | -- i8080\
      |        |          | -- i8080.h
      |        |          | -- i8080.c
      |        |          | -- i8080_mnem.h
      |        |          | -- i8080_mnem.c
      |        |
      |        | -- imgui\
      |        |          | -- backends\
      |        |
      |        | -- imgui-club\
      |        |          | -- imgui_memory_editor\
      |        |
      |        | -- SDL2\
      |                  | -- include\
      |                  | -- lib\        
      | -- src\
      |
      | -- vc\
      |       | -- Space-Invaders.sln
      |       | -- Space-Invaders.vcxproj