NES gravity toy project

This is a simple toy project with gravity simulation in 6502 assembly for the NES.

It comes with the assembly code and a NES compiled ROM.

It also includes an editor for files in CHR format written in JavaScript:

You can use this editor on GitHub Pages.

Run

Download the mesen emulator (arch/manjaro linux):

sudo pacman -Sy mesen

Run the .nes file with it:

mesen gravity.nes

Building the source

Since the NES uses a 6502 processor, you will need the following to compile the code:

• asm6.

To build the assembly simply run the following in a terminal:

asm6f gravity.asm gravity.nes

CHR Editor

In the chreditor-js/ folder you can find chreditor.html. Double-click or open it in a web browser and you should see a simple editor for CHR files.

You can use this editor on GitHub Pages.