Maybe there's a parameter in windoze setup that allows it to poll ports
like there is one for polling drive to see if the replacable disk has
changed. That makes it see a new floppy or CD even though all you did
was insert it. In a PC with a floppy or worse a hot removable drive
(like some Gateway laptops have used to switch from CD to floppy) when
it looks for the floppy or CD and the drive is gone or empty it hangs
the computer. My windoze XP computer SP2 doesn't have any serial ports,
but that board is at hand so I can key a rig for packet radio. I sure
don't want it keying randomly.
I suspect some uber thinker windoze function is asserting DTR (which is
used for keying) to detect if a hardware serial device is attached hot.
RS232 standard would require a modem to respond with DSR.
I didn't find the check floppy flag but I recall its found from the
control panel. I don't have any serial ports to check, and the USB
serial I want to check.
73, Jerry, K0CQ
On 3/2/2011 10:45 PM, Kim Elmore wrote:
> I've installed a new UTS and I still have the same issue. I also
> obtained a serial port slot plate adapter for the on-board COM port
> on the motherboard and tried that. I still have the same issue with it.
>
> Now, this really is new and I haven't the faintest idea what's
> happening. It's as if the DTR line (which is what the RigBlaster uses
> for PTT) is being polled. But it's being polled even through the
> on-board COM port (which I assume really is a 16650 UART).
>
> When I start any program that uses the assigned com port (COM2 if it
> matters) for PTT, such as MMTTY, HamScope or WinPSK, the polling
> behavior stops. When I use any of these, I go through EXTFSK (v1.06).
> If I go through the hardware manager and disable the port, the
> polling behavior stops. But, as soon as I enable the port, the
> polling behavior recommences.
>
> Has anyone ever seen behavior like this? If you did, how did you
> solve it? I'm using XP SP3...
>
> 73,
>
> Kim Elmore N5OP
>
>
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