I am trying to write a bcd down counter. If i have a hex value of
0x81 and then decrement the file with 'decf file,f' the new value
will be 0x80, if i dec again i will get 0x7f. I thought that the dc
flag would be set when going from 0x80 to 0x7f. It doe's'nt appear to
in mpasm using a pic18c84. Is'nt the dc flag a carry/borrow. whis is
set when going up from 0x0f-0x10 and down from 0x80-0x7f. The data
sheets say the the dc flag is effected by 'decf file' inst.

part of my code is

BCDDEC  DECF DISPD1,F
        BTFSS STATUS,DC    ;see if d3-d0 = 0x0f
        RETURN             ;not yet so return

        MOVF DISPD1,W      ;put count into w
        BTFSC STATUS,C     ;see if d7-d4 gone from 0x00-0xf0
        GOTO BCDDEC1       ;yep so go bcddec1
        SUBLW 0x06         ;no just d3-d0
        MOVWF DISPD1       ;sub 0x06 to return to 0x09
        RETURN             ;return


Am i wrong in my assumption, the dc flag works for a bcd up counter
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Kenny baby
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The Samaratans........They bring a smile to an empty heart.