2.3: Initial import of hardware.inc

Author: tobiasvl

README.md

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+# Gameboy Hardware definitions – `hardware.inc`
+
+`hardware.inc` has been the standard include file containing Game Boy hardware definitions for use in [rgbds](https://github.com/rednex/rgbds) projects for over 20 years.
+
+This repo is an attempt at version control. This is simply a kind of git mirror of the various flatfiles out there. I haven't written any of the actual code myself.
+
+## Version history
+
+The file was originally created by Jeff Frohwein in 1997, who still hosts [his latest version (2.3)](http://www.devrs.com/gb/files/hardware.zip) on his great [Dev'rs](http://devrs.com) website.
+
+Although Jeff Frohwein tried to version control the file with a rudimentary change log at the top of the file, people have added small changes throughout the years, often without bumping the version number.
+
+The most notable fork is by [@AntonioND](http://github.com/AntonioND), which is the one I've used as the mainline in this repo. Other forks will be added as branches, although I rarely know who made them.
+
+## Contributors
+
+* Jones (created the original `hardware.inc`, now lost)
+* Carsten Sorenson (whose ideas Jeff based his file on)
+* Jeff Frohwein
+* AntonioND
+* Probably lots of other people who have added to the file throughout the years