To answer question 2... A search for "null modem cable" on google will give you lots of good hits. For local kernel debug, you might just need to connect: Athlon Mac ground to ground txd to rxd rxd to txd If that is not enough, handshaking might require additional connections. There are variations, but I have had success, in other applications, with this handshaking setup: dtr to cd & dsr cd & dsr to dtr rts to cts cts to rts On a 9-pin connector: 1 = cd 2 = rxd 3 = txd 4 = dtr 5 = ground 6 = dsr 7 = rts 8 = cts 9 = ri You can probably buy a null modem cable at radio shack. It might also be sold as a lap-link serial cable. Be sure that the sex (protruding pins vs. recepticle) of the connector on the cable matches that on the computer you will connect to. Robert N. Evans Software Engineer S T R A T U S T E C H N O L O G I E S 111 Powdermill Road, Maynard, MA 01754-3409 U.S.A. * Tel. 978-461-7680 / * Fax. 978-461-3610 robert.evans@stratus.com Amateur Radio Call: N1BE -----Original Message----- From: Skip Gaede [mailto:sgaede@attbi.com] Sent: Friday, June 14, 2002 6:58 AM To: wlug@mail.wlug.org Subject: [Wlug] Xmon / Serial cable Folks, I'd like to try my hand at debugging the kernel boot process on a Macintosh PPC. I have a couple of silly questions, though. 1) Can I debug a Mac from an x86 box using Xmon? 2) I need a null modem cable to connect my Athlon and my Mac. Any thoughts as to where I could buy such a beast, or how to wire one up from parts obtained from Radio Shack? Thanks, Skip _______________________________________________ Wlug mailing list Wlug@mail.wlug.org http://mail.wlug.org/mailman/listinfo/wlug