Here goes: linux-w5px:/proc # chmod 777 /dev/ttyS* linux-w5px:/proc # ls -l /dev/ttyS* crwxrwxrwx 1 root uucp 4, 64 2009-04-14 06:32 /dev/ttyS0 crwxrwxrwx 1 root uucp 4, 65 2009-04-14 06:32 /dev/ttyS1 crwxrwxrwx 1 root uucp 4, 66 2009-04-14 06:32 /dev/ttyS2 crwxrwxrwx 1 root uucp 4, 67 2009-04-14 06:32 /dev/ttyS3 crwxrwxrwx 1 root uucp 4, 68 2009-04-14 06:32 /dev/ttyS4 crwxrwxrwx 1 root uucp 4, 69 2009-04-14 06:32 /dev/ttyS5 crwxrwxrwx 1 root uucp 4, 70 2009-04-14 06:32 /dev/ttyS6 crwxrwxrwx 1 root uucp 4, 71 2009-04-14 06:32 /dev/ttyS7 I should point out that I'm trying two different computers: an old IBM laptop 600X, and, a really old Toshiba desktop. Both! have exactly the same ls listing! Software is Chyenne Bitware Voice Mail System (works real well). When I try to "setup" the modem - the message is: "... com port currently used by another application ...". But it's not, that I am aware of. Dmesg on the old Toshiba referenced ttyS1, so, I have links in dosdevices to both com1 and com2. As you can see, I don't think this is a permissions issue. Interestingly, I have some really old DOS "Testcoms" software. Both report no com port (in xdosemu)! Is this an old Bios issue?
