smolnes

Open source

NES emulator in <5000 bytes of C

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NES emulator in <5000 bytes of C

A NES emulator in ~5000 significant bytes of c.

Plays some mapper 0/1/2/3/4/7 games.

Probably only builds on Linux and macOS. Try gcc or clang.

$ make

$ ./smolnes

Keys:

Look for line 20 in the source code. The following table shows which numbers map to which keyboard keys:

character	number	default key	NES button
\33	27	X	A Button
\35	29	Z	B Button
+	43	Tab	Select Button
(	40	Return	Start Button
R	82	Arrow Up	DPAD Up
Q	81	Arrow Down	DPAD Down
P	80	Arrow Left	DPAD Left
O	79	Arrow Right	DPAD Right

p2r3/smolnes-nut The smolnes emulator ported to Squirrel for Portal 2 - https://youtu.be/PUTRvF7slYs
nevesnunes/ghidra-plays-mario Playing NES ROMs with Ghidra's PCode Emulator
sysprog21/rv32emu Compact and Efficient RISC-V RV32I[MAFC] emulator (uses smolnes as a demo)
ma.tthias.xyz/en/blog/smolnes-vuln-research/ Vulnerability Research on SmolNES

Let me know if you've used smolnes and I'll add it to the list.