... that to expect Keil to provide complete and error free header files for all 4711 deriatives is just asking too much.

Erik

PS I never use them, the "standard system" for header files leads to way too many misses in a global search. And missing a place where a bit is manipulated can lead to veeeeery long debugging sessions.

as an example, here is my TCON for 93x

sfr     SF_TCON         = 0x88;
  sbit    SB_TCON_IT0     = 0x88;
  #define SM_TCON_IT0       0x01
  sbit    SB_TCON_IE0     = 0x89;
  #define SM_TCON_IE0       0x02
  sbit    SB_TCON_IT1     = 0x8A;
  #define SM_TCON_IT1       0x04
  sbit    SB_TCON_IE1     = 0x8B;
  #define SM_TCON_IE1       0x08
  sbit    SB_TCON_TR0     = 0x8C;
  #define SM_TCON_TR0       0x10
  sbit    SB_TCON_TF0     = 0x8D;
  sbit    SB_TCON_TR1     = 0x8E;
  #define SM_TCON_TR1       0x40
  sbit    SB_TCON_TF1     = 0x8F;