Re: 48GII USB adaptor for serial cable Message #2 Posted by Michael de Estrada on 1 Apr 2009, 2:21 p.m., in response to message #1 by Carl
It depends. If your HP48Gii already has Xmodem, then it should work fine. The adapter itself will register in the USB port as "new hardware", and you will install the drivers that came with the adapter. Once installed, it will show up in Windows Device Manager as a new serial port, which on my computer is COM3. When you connect your calc and run Xmodem, then Conn4x will find it on the new serial port. However, I have an HP-48SX, which does not have Xmodem, so I had to copy the file XSrvr48.hp from the Conn4x folder to my old DOS PC and then upload it via serial cable and Kermit from the PC to the calc. After that I had to attach it to the library in the calc before it could be run.
One other caveat. If you also have a HP-50g with a USB port that you are connecting to your PC, its USB drivers will be overwritten by those for the adapter, and it will no longer be recognized by the USB port. You would have to re-install those drivers, at which point the drivers for the adapter would be overwritten. Since I have a HP-50g, it was not worth the hassle, so I am no longer using the adapter. What I do instead is connect the HP-48SX to HP-50g via serial cable and connect the HP-50g to the PC via USB.
Hope this wasn't too confusing.
Michael
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