Every time you unplug and re-plug a USB serial cable you cause the system to create a new IRQ address for it, called COM5, 6,7,8,9 etc. If you do the thing where you "remove usb devices safely" routine you can avoid this. b
On Mon, Nov 19, 2018 at 12:13 PM geneb via cctalk <cctalk@classiccmp.org> wrote: > On Mon, 19 Nov 2018, Ethan via cctalk wrote: > > >> I have a question. I use the USB port for serial. In my program, I use > a > >> fixed com port. When going to the control panel, I find that I see (in > use) > >> tags on some of the com ports. I'm the only one currently using the com > >> ports but recently another (in use) showed up, requiring me to modify > my > >> program to use another com port. How does one unuse a com port? how do > I > >> find out what is using it so I can stop it? I'm using windows 7 > >> professional. Has anyone else had this problem? Dwight > > > > Do you unplug the USB to Serial dongle with a terminal program open? > > > FYI, "In Use" doesn't mean the port is actively used by another process, > it means that the /name/ has been assigned and isn't available to assign > to a new COM device. > > g. > > -- > Proud owner of F-15C 80-0007 > http://www.f15sim.com - The only one of its kind. > http://www.diy-cockpits.org/coll - Go Collimated or Go Home. > Some people collect things for a hobby. Geeks collect hobbies. > > ScarletDME - The red hot Data Management Environment > A Multi-Value database for the masses, not the classes. > http://scarlet.deltasoft.com - Get it _today_! >
