The Oscillator on a 25xx is a Saronix 3.864Mhz oscillator chip. Also see this
This is from one of Cisco's configuration guides - my documentation unfortunately was covered by a Cisco NDA I am looking for a public document which describes serial interrupt handling. But when you think about it input must also have a interrupt handler otherwise one would never be able to send a break sequence and have it acted upon. !--- Reduce async framing overhead to improve throughput. speed 115200 !--- The AUX port on the 2600 supports a speed of 115200. !--- Note: If you route through the AUX port, each character generates a !--- processor interrupt. This is an abnormally high load on the CPU, !--- which can be resolved if you use a lower AUX port speed. flowcontrol hardware !--- This configures RTS/CTS flow control. On Sun, Oct 5, 2008 at 10:54 PM, Dave hartzell <[EMAIL PROTECTED]> wrote: > Hmmm... > > I would be interested to see those docs. > > I find it hard to believe that a pin going high on a serial port would > generate an interrupt unless a process is listening to it. > > Its not that I don't believe you, I just have never run into this in > my 12+ years dealing with Cisco. Output logging crashes for sure, but > never anything with terminal servers. > > Scary stuff. I'm going to unplug all my consoles now! ;-) > > > On Sun, Oct 5, 2008 at 11:28 AM, Scott McGrath <[EMAIL PROTECTED]> wrote: >> Interrupts happen on any serial operation I'll dig out the relevant >> doc's as another interesting way to crash a 6509 is to have a terminal >> server randomly generating text. Been there, got the scars... and >> the root cause analysis from TAC... >> >> > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.