USB ports not detected by MAX

[AJones]

My system has 2 serial ports, one parallel port, and 2 ver 1.1 USB ports. I am running Windows 2000, with ver 3.0.2.3005 of MAX. When I look at the devices under MAX it shows the following ports:

Alias0 = "'COM1','ASRL1::INSTR'"
Alias1 = "'COM2','ASRL2::INSTR'"
Alias2 = "'LPT1','ASRL10::INSTR'"
Alias3 = "'LPT1.5','ASRL11::INSTR'"

When I look on other PC's with usb ports they show up as COM3, COM4 etc... Why don't they show up on mine, and what does LPT1.5 represent ?

I've tried removing and reinstalling MAX and VISA with no luck. I really need to be able to access the USB ports with VISA using both LabVIEW, and Visual Basic.NET. Is there some way to straighten this out ?

[rolfk]

AJones wrote:
> My system has 2 serial ports, one parallel port, and 2 ver 1.1 USB
> ports. I am running Windows 2000, with ver 3.0.2.3005 of MAX. When I
> look at the devices under MAX it shows the following ports:
>
> Alias0 = "'COM1','ASRL1::INSTR'"
> Alias1 = "'COM2','ASRL2::INSTR'"
> Alias2 = "'LPT1','ASRL10::INSTR'"
> Alias3 = "'LPT1.5','ASRL11::INSTR'"
>
> When I look on other PC's with usb ports they show up as COM3, COM4
> etc... Why don't they show up on mine, and what does LPT1.5 represent?

Windows does not have any standard drivers for USB to RS-232 adapters.
You need to install the drivers which came with your USB adapter to make
those ports available to Windows as COM ports. Then VISA will see them also.

LPT1.5 seems VERY strange. Windows has mes
sed up somehow here.

Rolf Kalbermatter