I'm liking this idea more and more myself.  Oringinally I
didn't care much for it because as someone else mentioned,
different look up tables for different digits.  Don't know
if someone else has pointed it out and I didn't see it, but
for 9 7seg +dp displays the coding would be easy.  Just
shift the connections by one for each digit.  Use the carry
as the common, read the table, and rotate.  Just wire each
digit differently..

   Disp 0:   0  a b c d e f g p
   Disp 2:   b  c d e f g p 0 a

  All of a sudden easy to use with one code table.  Anyone
have some good code to do a rotate through one byte w/o
carry for 8 7 segments on just one port?  May just be easier
to waste a pin but I hate to waste a pin due to lack of
coding.  Not to mention I'd rather just have 8 locations to
pump out for scanning and not have to store and find the 9th
bit if I don't need it..

Alan


James Cameron wrote:

> Yes, now I finally understand too.  Ingenious.
>
> I think I might use this idea, but I would imagine the coding to be a
> challenge.
>