Hello Jen,

I see two points, where you may have something to do:

1)      ;divide by powers of 10 to get one decimal character at a time
        MOVFF   RCREG,AARGB0

probably an small test on data ready flag in RCReg is missing

2)
SERDISP BTFSS   TXSTA,TRMT              ;if transmit shift register full
        GOTO    SERDISP                 ;loop until ready
?!      BSF     TXSTA,TXEN              ;enable transmission
        MOVFF   CHARIN,TXREG            ;move new character into buffer
        RETURN

why you re-enable the tranceiver each time you send an char? May be the
read-modify-write is the reason.

Good luck.

A.

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