Update README.md

README.md

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-# heron
+# About
+
+This is a Game Boy Advance emulator I wrote around 2013. Requires a GBA bios copy (not provided) to run.
+
+## References
+
+GBATEK: https://www.problemkaputt.de/gbatek.htm
+
+Pan Docs: https://gbdev.io/pandocs/
+
+GBSOUND.TXT
+
+Game Boy Sound Operation.txt
+
+ARM Architecture Reference Manual
+
+ARM7TDMI Data Sheet
+
+ARM7TDMI Technical Reference Manual 
+
+## Build Instructions (Visual Studio)
+
+Note: Requires wxWidgets (https://www.wxwidgets.org/)
+
+Set Character Set to Use Unicode Character Set.
+
+Disable SDL checks.
+
+Include wxWidgets headers.
+
+Include the following libraries: d3d9.lib, dsound.lib, dinput8.lib, dxguid.lib, wxWidgets libs.
+
+Set SubSystem as Windows.
+
+Build.