Add information in README.md

README.md

@@ -1 +1,24 @@
 # CHIP-8
+
+## Compile-time options
+
+You can tweak some variables:
+- `SCALE`: Increase the size of pixels
+- `WAIT`: Time waited between two opcodes in microseconds
+
+You can set them in the CPPFLAGS of the Makefile with `-DWAIT=100 -DSCALE=20`
+
+## How-to run
+
+```
+make
+./bin/chip8 ROM
+```
+
+## Find ROMs
+
+You can find ROMs [here](https://github.com/dmatlack/chip8/tree/master/roms).
+
+## Test ROM
+
+https://github.com/corax89/chip8-test-rom