more cleanup, joystick works again

libsrc/pce/readme.txt

@@ -0,0 +1,31 @@
+
+joystick support should get verified on real hw, the masks for buttons may be
+wrong.
+
+clock() does not work for unknown reasons
+
+get_tv() is a dummy function and always returns 0
+
+revers() is a dummy function, actual reverse output is not supported yet
+
+waitvblank() is missing
+
+some graphical petscii chars should get added to the charset
+
+conio-init should get initialized from a constructor rather than always get
+called from crt0
+
+--------------------------------------------------------------------------------
+
+a good emulator to use for PC-Engine is "mednafen" (mednafen.sourceforge.net)
+
+run the compiled binary like this:
+
+> mednafen -force_module pce <yourprogram.pce>
+
+joypad keys are mapped like this:
+
+w/s/a/d         up/down/left/right
+numpad 2        (?) button
+numpad 3        (?) button
+enter           (start) button