Re: USB-Serial Adaptor? Message #3 Posted by James M. Prange on 16 Apr 2003, 3:04 a.m., in response to message #1 by David Bengtson
I'm primarly curious as to how the PC Connectivity kit works
with a USB to Serial adaptor.
I expect that it may well depend on which adapter and the driver that
comes with it.
I've been using a "USB Serial Converter-UC 310". It came with a USB
cable, the converter itself, a DB25 to DB9 adapter, and a driver CD-ROM.
It's not listed now, but visit
http://www.cablewholesale.com/catalog/usbadaptors.htm
Using HPComm v3.0r4, ASCII and binary file transfers, "Backup...", and
"Restore" (all using the Kermit protocol) work fine, but "Capture
Image..." doesn't work with the converter.
If I use the built-in serial port instead of the converter, then
"Capture Image..." does work.
The HP Connectivity Kit XModem kit version 1.0.9 can't find the COM port
when I use my converter.
If I use the built-in serial port instead of the converter, then the
XModem kit does work.
Hilgraeve's HyperTerminal Private Edition, Ver 6.3 (see
http://www.hilgraeve.com/htpe/index.html) works with either the
converter or the built-in serial port. I guess that the HyperTerminal
that comes with MS Windows would also work, but I don't know that for
certain. This works as a terminal emulator, allows you to "Capture
Text..." (from XMIT or the various print commands), "Send Text File..."
(using SRECV on the calculator), transfer using the Kermit protocol, and
transfer using the XModem protocol. But note that it doesn't recognize
the 49G's XModem Server mode, so you have to use XSEND and XRECV on the
calculator and always provide a name on the receiving device. Also, for
XModem, it initially expects CRC error checking, and it takes a
considerable time to fall back to checksum error checking.
I usually use HyperTerminal, it always works. Sometimes I have trouble
with HPComm losing the connection, and occasionally I
can't get it to connect at all without rebooting MS Windows.
I haven't found any application that works as well as MS-DOS Kermit
(though I suppose that I could try Kermit 95), but it's no surprise that
it can't find the adapter's serial port. Under MS Windows 98SE, it often
has trouble finding the built-in serial port, though it always works
perfectly with the built-in serial port if I boot to DOS.
All of this is using MS Window 98SE. With the various possible operating
systems and software and hardware configurations, "Your Mileage May
Vary".
Regards, James
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