>                       00009
> Warning[205]: Found directive in column 1. (end)
>                       00010 end

Although you have the often missed 'end' directive, try putting it in the
correct column!

        list    p=16f84
                radix   hex

;------------------------------------------------------------

        org     0x000
nop
        nop
                nop

        end

This should assemble OK and correctly tell you that the first nop is in the
wrong column.

Cheers

Dave B