site_archiver@lists.apple.com Delivered-To: darwin-kernel@lists.apple.com On Jan 24, 2005, at 12:38 PM, Justin Walker wrote: Currently I see my IOLog() messages in to the /var/log/system.log file. Can I redirect it to my serial port? My Sytem is MAC OS X 10.3.7 on Power MAC G5. If yes, Do I have to set do nvram boot-args="debug=0x08" ? (DB_KPRT) I learned from Kernel Programming.pdf . I tried it, but I still get IOLog() messages in the same file. About the USB thing that some folks have mentioned, that won't work. The kprintf requires a serial chip that is directly addressable because it uses polled I/O (so that it can work with interrupts disabled). That pretty much means that without a complete rewrite, you're pretty much limited to the serial hardware on the main logic board, unless you find a PCI card with a Zilog 8530 (in which case you'd probably still need to hack the PCI drivers up a bit to guarantee that the device didn't get remapped or anything...). There are stealth cards for the first generation G5s available from GeeThree. If you have a second generation G5 (after the 2.5 GHz speed bump), well... the stealth cards reportedly won't fit. I don't know if they'll be doing a redesign for those or not (or even if it's possible---you'd have to ask someone at GeeThree). David _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.a... I believe this should work, if you have a serial port. This email sent to site_archiver@lists.apple.com