PIC 18f65j10 flash write - erase

BSF EECON1, EEPGD ; point to Flash program memory
BCF EECON1, CFGS ; access Flash program memory

extern volatile near unsigned char       EECON1;
extern volatile near struct {
  unsigned :1;
  unsigned WR:1;
  unsigned WREN:1;
  unsigned WRERR:1;
  unsigned FREE:1;
} EECON1bits;