TULIP4041 Startup Question

[MeindertKuipers]

Summarizing this issue:
A terminal emulator is used to verify connections and find out the COM port number for the various interfaces. The HP-IL virtual interface simulates a closed loop when there is no virtual device connected. This results in the NO DRIVE message when doing a DIR.
If the connected device is a terminal emulator the loop will appear open, sine the emulator does not pass the HP-IL packets. This results in the TRANSMIT ERR.
Only a virtual HP-IL device (like ILPer or pyILPer) will process the HP-IL packets in the correct way and the TULIP then acts as an HP-IL module with PILBox attached.