Austen, The CYCLE_CNT CSR (accessable from the IX Bus Interface Unit) can be used to implement timing schemes. Have you taken a look at the cycle macros (found in \IXP1200\Microcode\include\cycle.uc) for examples on how to access this 64-bit counter? Eric Heaton Technical Marketing Engineer Intel Corporation - PNPO phone: 978-568-6027 -----Original Message----- From: Austen McDonald [mailto:austen@cc.gatech.edu] Sent: Tuesday, June 05, 2001 2:47 PM To: ixp1200@CS.Princeton.EDU Subject: [ixp1200] Timer from microengines... Im looking for a timer for use inside microcode (for network protocol timeout). I know there is the timer from the arm but Ive heard that the IX bus has some kind of timer that I might be able to tap into? Does anyone know about this? Must I use the SA timer if I want to wait a certain period of time? Austen McDonald austen@cc.gatech.edu God does not care about our mathematical difficulties. He integrates empirically. -- Albert Einstein