John Hansen wrote:

> Checking the schematic, I see that 9 volts was indeed drawn off before
> the regulator, but I can't find anywhere on the set of schematics that
> actually uses this voltage level.

  Probably for RS-232.  I haven't looked at the thing (haven't got one).

>  Has anyone tried running an ICD from a standard 12-13 volt supply?

  No, but put your finger on the 7812.  If you get burnt, bolt a
heatsink to it.
--
  Cheers,
        Paul B.