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ddg://enumerate COM ports site:perlmonks.org -> open com port list, Re: finding a serial port with Win32::SerialPort, Marrying Tk, threads and SerialPort - a COM port monitor
$ reg query "HKLM\Hardware\DEVICEMAP\SERIALCOMM
! REG.EXE VERSION 3.0
\Device\AgereModem5 REG_SZ COM3
$ mode COM2
Illegal device name - COM2
$ mode COM3
Status for device COM3:
Data Bits: 7
Stop Bits: 1
CTS handshaking: OFF
DSR handshaking: OFF
DSR sensitivity: OFF
DTR circuit: ON
RTS circuit: ON
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