S_SYS_PART
#define M_SYS_PART _SB_MAKEMASK(16,S_SYS_PART)
#define V_SYS_PART(x) _SB_MAKEVALUE(x,S_SYS_PART)
#define G_SYS_PART(x) _SB_GETVALUE(x,S_SYS_PART,M_SYS_PART)