Chapter 3: Software Installation - Windows NT
3-43
Echo
User's Manual, ver. 0.00
Technical tips
1.
You can test the additional serial ports with a program like
Terminal or HyperTerminal.
2.
A test program is available on the
DFlex DOS Driver
diskette (p/n: DISK306). It is a Windows 95 and Windows
NT compatible test program. For more information please
check the file
sertest.zip
. This program requires a loopback
connector (see the file
readme.pts
on the
DFlex DOS Driver
diskette for loopback wiring instructions)
3.
There is no direct support for RS-485 half duplex
communications within the Windows NT serial driver.
4.
The RS-422 interface will work in point to point, full duplex
and multi-drop communications.
5.
Some Windows 95 and Windows NT applications can only
access up to COM9. These applications include:
Modem Setup Wizard
Printer Setup Wizard
Visual Basic
Terminal
For developers a work around is available under Microsoft
C++. You can label serial ports as
COM1, COM2...
, etc., for
serial ports 1 to 9. An alternative method is to label them as
\\.\COM1, \\.\COM2...
,
etc. You can access all serial ports under
Windows NT and Windows NT using this alternative method.
See your Microsoft C++ documentation for more
information.