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NES emulator in <5000 bytes of C++

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@binji
binji Add image of source code.
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b84855e Oct 28, 2022
Add image of source code.
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smolnes Features Screenshots Building Running Updating keys

README.md

 smolnes

A NES emulator in ~5000 significant bytes of c++.

 Features

Plays some mapper 0 and mapper 1 games.

 Screenshots

Bionic Commando Donkey Kong Dragon Warrior Adventures of Lolo Legend
of Zelda Metroid Mega Man 2 Ninja Gaiden Rad Racer Super Mario Bros.
Teenage Mutant Ninja Turtle

Source Code

 Building

Probably only builds on Linux and macOS.

$ make

 Running

$ ./smolnes <rom.nes>

Keys:

  Action     Key
DPAD-UP     |
DPAD-DOWN   |
DPAD-LEFT   -
DPAD-RIGHT  -
B           Z
A           X
START       Enter
SELECT      Tab

 Updating keys

Look for lines 23 and 24 in the source code. The following table
shows which numbers map to which keyboard keys:

number default key gameboy button
27     X           A Button
29     Z           B Button
43     Tab         Select Button
40     Return      Start Button
79     Arrow Right DPAD Right
80     Arrow Left  DPAD Left
81     Arrow Down  DPAD Down
82     Arrow Up    DPAD Up

Replace the numbers on this line with one from the SDL scancode list.

About

NES emulator in <5000 bytes of C++

Resources

Readme

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58 stars

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  * C++ 99.5%
  * Makefile 0.5%

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