Dear Diego,
now I got the time to make some tests. All tests are performed on a Windows NT 4.0 SP6a german system with a development system and a NI clean system (meaning no NI products were installed before the test).
The hardware has two serial ports and two parallel ports. On the development system there were three COM ports emulated by my AVM Fritz! ISDN card. The NI clean system has the same hardware but there were no drivers installed for the AVM Fritz! ISDN card.
The tests are running with LV 6.0.2, LV 6.1, LV 7.0 with VISA 3.0 on the development system and VISA 2.6 on the NI clean system. All test results are the same. I've got "ASRL1 (COM1)", "ASRL2 (COM2)" and so on. The ports for the AVM Fritz! ISDN card are reporting "(AVMISDN
". Using the interface description string and scanning for "(COM" will give all serial ports.
Interestingly on my NI clean system FindResource also found "ASRL3::INSTR" and "ASRL4::INSTR" with an empty interface description string. My scanner is connected to "ASRL10 (LPT1)" and the printer to "ASRL11 (LPT2)" which will be displayed correctly. On my development system it was "ASRL6::INSTR" and "ASRL7::INSTR" with an empty interface description string. MAX reports them with an alias and Port Binding named HPF_151 and HPF_152 and an unknown interface name. These ports are listed in the registry as a DosDevice and some further searching results in that this ports belong to the printer driver and the HP Printing system for Windows.
Waldemar
Waldemar
Using 7.1.1, 8.5.1, 8.6.1, 2009 on XP and RT
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