> ;*************Wire 1*******************
> Instant call Bank1
>                 movlw b'11111110'
>                 movwf TRISB
>                 call Bank0
>                 clrf PORTB
>                 clrf PORTC
>                 movlw b'00000001'
>                 movwf PORTB
>                 movf WIR1S, w
>                 iorwf PORTB, w
>                 iorwf PORTC, w
>                 movwf WIR1S
>                 movlw 0xFF
>                 btfsc PORTC,0
>                 movwf WIR1C

I think you should use shadow registers for the ports to eliminate
any possibility of the problem being caused by read-modify-write,
particularly, if I understand you, because each pin has a series
resistor and there will be cable capacitance

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