Updated README with build instructions.

README.md

@@ -1,5 +1,67 @@
 # l65
 
-Enable vim files:
+l65 is a 6502 assembler, operating from within Lua and written in Lua. This means assembler mnemonics become regular Lua statements anywhere in the moddle of regular Lua code.
+
+## Building
+
+Use CMake to build a standalone executable. Following are basic instructions if you've never used CMake.
+
+### Windows
+
+32b version:
+```
+mkdir build\win32
+cd build\win32
+cmake -G "Visual Studio 15 2017" ..\..
+cmake --build win32 --config Release
+```
+
+64b version:
+```
+mkdir build\win64
+cd build\win64
+cmake -G "Visual Studio 15 2017 Win64" ..\..
+cmake --build win64 --config Release
+```
+
+### Linux
+
+```
+mkdir build/linux
+cd build/linux
+cmake ../.. -DCMAKE_BUILD_TYPE=Release
+make
+```
+
+Force 32b build on 64b system:
+```
+mkdir build/linux32
+cd build/linux32
+cmake ../.. -DCMAKE_BUILD_TYPE=Release -DCMAKE_C_FLAGS=-m32
+make
+```
+
+## Vim files installation
+
  * copy vim/* into ~/vimfiles/
- * add "au BufRead,BufNewFile *.l65 set syntax=l65 filetype=l65" to ~/.vimrc (or ~/_vimrc on Windows)
+ * add `au BufRead,BufNewFile *.l65 set syntax=l65 filetype=l65` to ~/.vimrc (or ~/_vimrc on Windows)
+
+## Credits
+
+Developed by g012, using:
+ * [Lua 5.3.4](https://www.lua.org/)
+ * [LuaMinify](https://github.com/stravant/LuaMinify)
+ * Lua syntax file shipping with [vim](http://www.vim.org)
+ * Lua indent file from [vim-lua](https://github.com/tbastos/vim-lua)
+
+Not using, but integrated for end-user convenience:
+ * [LuaFileSystem](https://keplerproject.github.io/luafilesystem)
+ * [LPeg](http://www.inf.puc-rio.br/~roberto/lpeg)
+
+Projects which inspired l65:
+ * [nimble65](https://bitbucket.org/kylearan/nimble65)
+ * [k65](http://devkk.net/wiki/index.php?title=K65)
+
+## License
+
+l65 is licensed under the MIT License, see LICENSE for more information.