??b&nbsp;&nbsp; b: button state</TT>
<BR><TT>On write:</TT>
<BR><TT>????????&nbsp;&nbsp; ?: strobe activation value</TT>

<P>These are called the "old-style" joypad registers because they are used
like the NES used them.&nbsp; First of all, to use these registers, bit
0 of $4200 must be clear (I suppose to prevent conflict between the SNES's
automatic read mechanism and the manual method.)&nbsp; If this bit is set,
then these registers simply return whether the joypad is connected (0=Not
connected.)&nbsp; B