On Tue, 4 Apr 2006, Gerhard Fiedler wrote:

> Vertical counters:
>  H0 G0 F0 E0 D0 C0 B0 A0
>  H1 G1 F1 E1 D1 C1 B1 A1
>  H2 G2 F2 E2 D2 C2 B2 A2
>
> See why they are called "vertical"? :)  The handling itself is more
> complicated for vertical counters, but it has to be done only once for a
> whole set of 8 inputs. (And Scott already explained how to do it :)
>
> I don't think they make sense for two or three inputs. Not sure where the
> threshold is. I guess the threshold depends also on the number of counts.

No, it does not. Vertical counters can be expanded to more than 8 bits 
easily.

Peter

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