It doesn't matter to the compiler if you define TRISB as 0x86 or 0x06
because it cannot fit 8 bits of data into the file register data of the
instruction you are using (MOVWF TRISB). Therefore the compiler
truncates the value to be 7 bits long. You should then get a message
telling you of this.

What does make the difference is setting the status,rp0 bit to access
the TRIS registers which you appear to have done. However I would do it
like this..

movlw 0xFF
movwf PORTB
movwf PORTA
bsf STATUS,5
clrf TRISA
clrf TRISB
bcf STATUS,5

If your chip is not agreeing with this code then I would suspect that
the rest of your code is in error. Did you remember to go back to RAM
page 0 after setting the TRIS registers?


--
Best regards

Tony

Multimedia 16F84 Beginners PIC Tools.

http://www.picnpoke.com
Email picnpoke@cdi.com.au