> or do I have to resort to a 16-bit shift register? Note the fact that I
> need to light 1 green & 1 red led at the same time, so usual matrix
> arangements won't work.

I *think* you would need 16 pins to control 8 * 2-pin LEDs. If so, you
could either connect 2 * 8-bit SRs serially and have each LED to an
adjacent pair of SR o/ps or use the SRs in parallel with the LEDs
between them (ie SR1d0 - LED+R - SR2d0), which amounts to the
same thing except 1 * 16-bit is a little simpler to i/f to

OTOH Maxim et al are always putting out new LED controller ICs

www.maxim-ic.com

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