sfr S0_TCON             = 0x88;
  sbit    SB0_TCON_TF1    = 0x8f;
  sbit    SB0_TCON_TR1    = 0x8e;
  sbit    SB0_TCON_TF0    = 0x8d;
  sbit    SB0_TCON_TR0    = 0x8c;
  sbit    SB0_TCON_IE1    = 0x8b;
  sbit    SB0_TCON_IT1    = 0x8a;
  sbit    SB0_TCON_IE0    = 0x89;
  sbit    SB0_TCON_IT0    = 0x88;