perry@bluemtn.uucp (Perry Minyard (3MTA3)) (02/07/90)
Im running SCO XENIX 386 2.3.3-AT using a 20MHZ 80386 "DYNA" machine with 4 meg ram, and an 80 meg seagate drive. I have a Hayes 9600 baud V Series modem attached to COM1 (tty1A). If I turn the modem off while the operating system is up and running, the machine does a cold boot. This also happens on another machine which is a 33 mhz 80386 using the same type of serial card and modem and OS. The card is a generic "SUNTEK" serial card with just one serial port. The system only reboots though while running Xenix. If I'm under dos, or if I issue a haltsys command, then turn the modem off, it wont reboot, which leads me to believe there is a bug or something in Xenix that triggers the reboot when the modem is turned off. I also have the same type of serial card and 33mhz machine running at my office under SCO XENIX 386 2.3.3 (GT Version (for a SCSI drive), and it doesn't reboot when the modem is turned off. All three computers, modems, and serial cards are the same brand. 2 of the 3 computers are 33mhz 80386, and the third is a 20mhz. Two of the three (20mhz and 33mhz) reboot when the modem is turned off. They both are using the AT version of Xenix, which leads me to believe that this problem is not hardware specific and is occurs in the AT, not GT version. Has anyone else had similar experiences or know of a fix for this? Thanks, Perry Minyard ..!uunet!emory!bluemtn!perry
jbayer@ispi.UUCP (Jonathan Bayer) (02/08/90)
perry@bluemtn.uucp (Perry Minyard (3MTA3)) writes: }Im running SCO XENIX 386 2.3.3-AT using a 20MHZ 80386 "DYNA" machine with }4 meg ram, and an 80 meg seagate drive. I have a Hayes 9600 baud V Series }modem attached to COM1 (tty1A). }If I turn the modem off while the operating system is up and running, }the machine does a cold boot. This also happens on another machine which }is a 33 mhz 80386 using the same type of serial card and modem and OS. }The card is a generic "SUNTEK" serial card with just one serial port. [ deleted ] }I also have the same type of serial card and 33mhz machine running at my office }under SCO XENIX 386 2.3.3 (GT Version (for a SCSI drive), and it doesn't reboot }when the modem is turned off. All three computers, modems, and serial [ more stuff deleted ] It sounds like you might have a bad serial card. Somehow the serial card is triggering a hardware reset when the modem is turned off. Try replacing the serial card or even swapping it with the one at the office and see what happens. JB -- Jonathan Bayer Intelligent Software Products, Inc. (201) 245-5922 500 Oakwood Ave. jbayer@ispi.COM Roselle Park, NJ 07204