FIXXC800 Compiler Directive

FXC8

None.

Compiler generates code that may contain MOV dir,dir with two special function registers.

Options — C51 — Misc Controls.

The FIXXC800 directive prevents from creating code that contains MOV dir,dir with two special function registers (i.e. MOV P1,B). This directive is implemented to bypass chip problems on some XC800 device variants. Refer to the errata sheet of your device for more information.

sfr X1=0x91;
sfr X2=0xA2;
sfr16 Y1=0xFA;

unsigned int j;
char c;
void main (void) {
  X1 = X2;           // by default creates MOV X1,X2
  Y1 = X1 * 12;      // by default creates MOV Y1+1,B
}