S_MAC_SPEED_SEL
#define M_MAC_SPEED_SEL _SB_MAKEMASK(2,S_MAC_SPEED_SEL)
#define V_MAC_SPEED_SEL(x) _SB_MAKEVALUE(x,S_MAC_SPEED_SEL)
#define G_MAC_SPEED_SEL(x) _SB_GETVALUE(x,S_MAC_SPEED_SEL,M_MAC_SPEED_SEL)