NAME   
	SetBPen -- Set secondary pen for a RastPort

   SYNOPSIS
	SetBPen( rp, pen )
		 a1  d0

	void SetBPen( struct RastPort *, UBYTE );

   FUNCTION
	Set the secondary drawing pen for lines, fills, and text.

   INPUTS
	rp - pointer to RastPort structure.
	pen - (0-255)

   RESULT
	Changes the minterms in the RastPort to reflect new secondary pen.
	Sets line drawer to restart pattern.

   BUGS

    SEE ALSO
	SetAPen() graphics/rastport.h