<sect1>NES specific functions<p>
<itemize>
-<item>waitvblank
+<item>waitvblank - wait until the start of vblank
<item>get_tv
</itemize>
</descrip><p>
+The generic interface doesn't export the start and select buttons. To
+test for those, use the defines in nes.h instead of the generic masks.
+
+Example:
+<tscreen><verb>
+if (joy_read(0) & KEY_A)
+</verb></tscreen>
+
<sect1>Mouse drivers<p>