sfr SF_TCON     =  0x88;	// timer control
  sbit SB_TCON_TF1   = 0x8F;              // timer 1 overflow flag
  sbit SB_TCON_TR1   = 0x8E;              // timer 1 on/off control
  sbit SB_TCON_TF0   = 0x8D;              // timer 0 overflow flag
  sbit SB_TCON_TR0   = 0x8C;              // timer 0 on/off control
  sbit SB_TCON_IE1   = 0x8B;              // ext. interrupt 1 edge flag
  sbit SB_TCON_IT1   = 0x8A;              // ext. interrupt 1 type
  sbit SB_TCON_IE0   = 0x89;              // ext. interrupt 0 edge flag
  sbit SB_TCON_IT0   = 0x88;              // ext. interrupt 0 type
  #define SM_TCON_TF1       0x80
  #define SM_TCON_TR1       0x40
  #define SM_TCON_TF0       0x20
  #define SM_TCON_TR0       0x10
  #define SM_TCON_IE1       0x08
  #define SM_TCON_IT1       0x04
  #define SM_TCON_IE0       0x02
  #define SM_TCON_IT0       0x01