Xref: utzoo unix-pc.general:90 comp.sys.att:1818 Path: utzoo!mnetor!uunet!ukma!cbosgd!gwspc!cbcsta!n8emr!uncle!jbm From: jbm@uncle.UUCP (John B. Milton) Newsgroups: unix-pc.general,comp.sys.att Subject: The mystery 4th LED Message-ID: <203@uncle.UUCP> Date: 14 Dec 87 02:24:28 GMT Reply-To: jbm@uncle.UUCP (John B. Milton) Organization: Just me and my computer, Columbus Ohio Lines: 29 As some of you noticed who have had your UNIXpc apart, there are not 3, but 4 LEDs on the motherboard near the vents on the left. There were a bunch of messages a while ago about what each of these means. For fun I was reading through section 2 of the users manual and found syslocal (2). Some very neat and dangerous stuff here. Surprise surprise there is a cmd for syslocal called SYSL_LED to turn on and off the "user LED". You don't even have to super-user. I have no idea what possible use this could be. I can remember a time back in the old 1802 days when it was though... Here is a quicky utility to usr it. #include#include int main (argc,argv) int argc; char *argv[]; { if (argc<2) { fprintf(stderr,"Usage: %s 0|1\n",argv[0]); exit(1); } else syslocal(SYSL_LED,atoi(argv[1])); } -- John Bly Milton IV, jbm@uncle.UUCP, {ihnp4|cbosgd}!n8emr!uncle!jbm home: (614) 294-4823, work: (614) 424-7677, FLAME via email :)