Reorganize src/ directory

src/core/dune

@@ -1,3 +1,3 @@
-(executable
+(library
 	(name oboy)
 	(libraries threads))

src/core/memory.ml

@@ -13,10 +13,10 @@ open Printf
     @see http://imrannazar.com/GameBoy-Emulation-in-JavaScript:-Memory *)
 
 (** Common addresses *)
-let gDIV  = 0xFF04 (** divider register *)
-let gTIMA = 0xFF05 (** timer counter *)
-let gTMA  = 0xFF06 (** timer modulo *)
-let gTAC  = 0xFF07 (** timer control *)
+let gDIV  = 0xFF04 (* divider register *)
+let gTIMA = 0xFF05 (* timer counter *)
+let gTMA  = 0xFF06 (* timer modulo *)
+let gTAC  = 0xFF07 (* timer control *)
 
 type map = {
   rom_bank_00 : bytes; (* cartridge, 16KB *)

src/retroarch/retroarch.ml

@@ -0,0 +1,7 @@
+open Ctypes
+open PosixTypes
+open Foreign
+
+(* typedef void (RETRO_CALLCONV *retro_video_refresh_t)(const void *data, unsigned width,
+unsigned height, size_t pitch); *)
+let retro_video_refresh_t = ptr void @-> int @-> int @-> returning void