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- Path: FreeNet.Carleton.CA!an171
- From: an171@FreeNet.Carleton.CA (Anthony Hill)
- Newsgroups: comp.dcom.modems
- Subject: Re: USR Sportster Winmodem Questions
- Date: 4 Apr 1996 04:00:22 GMT
- Organization: The National Capital FreeNet
- Sender: an171@freenet6.carleton.ca (Anthony Hill)
- Message-ID: <4jvhgm$aev@freenet-news.carleton.ca>
- References: <3161C9BC.6A1C@tamu.edu>
- Reply-To: an171@FreeNet.Carleton.CA (Anthony Hill)
- NNTP-Posting-Host: freenet6.carleton.ca
-
-
- (BenDover@tamu.edu) writes:
- > I recently purchased a USR Sportster Winmodem 28.8 internal. I am happy
- > with the improvement from the RPI 14.4 I had (Zoom), but I would like to ask a few questions
- > about the Winmodem...
- >
- > 1) Could I get more performance out of it? (sustained transfer of zipped files is around 2.7 K)
-
-
- There's probably not a heck of a lot you can do to improve the
- performance of the modem. Depending on what sortware you're using you
- might be able to improve the performance of you're software, but if you're
- getting 2700cps you're modems probably working about as well as it can
- over your current phone lines.
-
- > 2) Should I buy a 16550 UART for my Winmodem?
- > I have an older computer with a 8250 UART, and the last modem I used
- > (int 14.4) had its own 16550 UART. The Winmodem does not seem to have its own UART (at least it
- > didn't show up when I ran MSD... please correct me if I am wrong) Maybe something about the
- > Winmodem's design eliminates the need for a 16550 UART???
-
-
- Yup, something in the Winmodem does eliminate the need for a
- 16550, or more accurately the lack of something. Since all the processing
- for the Winmodem is done by your host computer, the drivers also have to
- emulate a serial port instead of having a real serial port as part of the
- modem card. This is actualy one of the advantages of the Winmodem as it
- completely eliminates the possibility of com overruns (which is why
- regular modems need a 16550 UART in the first place) and it reduces the
- amount of processor power used for I/O.
-
- > 3) Why won't the Winmodem give me the option during configuration to choose 02F8 as the address
- > for com2? That, with irq = 3, was what I used for my old modem.
-
- 2F8 is the default address for Com2. Assuming Com2 is free, you
- should be able to choose that from the configuration menu.
-
- > 4) What Winsock, DTE, etc... settings have given the best (throughput) results? I am using 536,
- > 576, 2144, and 57,600 as the settings in my winsock.
-
- I dunno about the TCP/IP settings, I'm not the one to ask about
- those. As for DTE speeds though, it really shouldn't matter. Because of
- the way the Winmodem emulates a serial port (as mentioned above), it
- should transfer full speed whether you have the modem set at 300bps or
- 115200bps.
-
- Anthony
- --
- Anthony Hill | an171@FreeNet.Carleton.CA
-