I«ve read the PIC16C5x datasheets and found this: 1.- In PIC16C5x the portA is taken as f5 : i.e. in PIC16C5x portA register«s adressess is h«05« . For example: to write in portA: movf w,f5. But in PIC16C7x this register is treated as PORTA, not as fx where x is the adressess of the register. So here is my doubt: Can I handle a register as "fx", where x is the adressess of the registe r, in both PICs ???? and In PIC16C5X can I use PORTA instead f5 or PORTB instead f6 ???? If somebody Can help me I«d be very glad, Thanks.