> DLY3          MOVLW       D'250'          ;
>                    MOVWF        TEMP1        ;  LITTLE DELAY
>                    DECFSZ        TEMP1,1     ;
>                    GOTO    DLY3

This loop will put the value 250 into the TEMP1 register, then decrement
it, then put 250 into TEMP1, then decrement it, then put 250 into TEMP1
then decrement it, etc.  To make this loop work, move the "DLY3" label down
by two lines, so it's on the DECFSZ instruction.

However, it seems rather unlikely that you'd really need anywhere near that
long a duration for the enable signal.  You'd need to check the 4094's data
sheet for the minimum time required, but I would imagine that a NOP or two
would give a sufficient delay.

You will need to add some NOPs in the nexout loop for reliable operation,
unless your PIC is running at a very low clock rate.  Successive BCF/BSF
operations to the same port (I'm assuming that _data and _clock are bits in
the same port) will produce unexpected results if there is enough of a load
on the port pins that it takes more than one clock cycle for them to
actually change state.  This should be explained in your PIC's data sheet.

It would be a good idea for you to use the 'W' or 'F' symbol for the
destination operand of instructions that require one (for example, "DECFSZ
TEMP1,F"), as this is a lot more readable and meaningful than using '0' or
'1'.
        Jason Harper