Messages in this thread | | | Date | Tue, 8 Jul 1997 22:34:20 +0200 | From | Pavel Machek <> | Subject | Kernel debugging hardware - blinkenlights |
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Hi!
Some time ago it was debate here about what hw could be used for debugging kernel... Here's what I built:
8 leds connected to paralel port, so what goes on hw port 378 can be easily seen. (Actually they are 12, but 4 remaining due not shine too much - not worth that work).
I make them display stage of kernel booting, and after bootup low bits of PID of current process. You can see _much_ of what happens on such lights!
And now questions: 1) How many other similar devices are out there? [Something similar is put on port 0x80, I saw something similar on sun 4/330 - do newer suns have this?] 2) I would like some led to indicate ppp & eth0 activity. Where should I add a hook?
Pavel
-- I'm really pavel@atrey.karlin.mff.cuni.cz. Pavel Look at http://atrey.karlin.mff.cuni.cz/~pavel/ ;-).
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