Re: PATCH : LEDs - possibly the most pointless kernel subsystem ever

[jw schultz <jw@pegasys.ws>]

On Wed, Jul 30, 2003 at 05:08:34PM +0100, John Bradford wrote:
> I'll buy some LEDs and build a parallel port connected LED panel
> tomorrow...  Do you think the overhead of driving the LEDs would have
> too much of a negative effect on system performance?  If so, or if we
> want more flexibility, maybe we could work out a design for a PCI
> card, which could include more than 12 LEDs - 7-segment numeric
> displays of pid, etc.

If you are going to talk special hardware i'd suggest making
it a USB device instead of a PCI card.

Most systems manufactured in the last five years or so ago
have USB but laptops don't and many servers don't have a
spare PCI slot.  There is enough power specified by the
standard to make it a passive device in most cases.  If you
want you could use a cable long enough to mount the display
on the wall outside the wiring closet or server room.

Sounds fun so have some.

-- 
________________________________________________________________
	J.W. Schultz            Pegasystems Technologies
	email address:		jw@pegasys.ws

		Remember Cernan and Schmitt