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- Path: news1.channel1.com!usenet
- From: tonypere@user1.channel1.com (Tony PΘrez)
- Newsgroups: comp.dcom.modems,comp.ibm.pc.hardware,comp.sys.ibm.pc.hardware.comm
- Subject: Re: Silly problem with Supra FaxModem
- Date: Sun, 28 Jan 1996 15:37:16 GMT
- Organization: Channel 1 Communications
- Message-ID: <4eg5bs$b6s@news1.channel1.com>
- References: <4c2kip$35l@accursio.comune.bologna.it> <rcgoldschmidt.186.01C8E361@nih.gov>
- NNTP-Posting-Host: user1.channel1.com
- X-Newsreader: Forte Free Agent 1.0.82
-
- rcgoldschmidt@nih.gov (Bob Goldschmidt) wrote:
-
- >In article <4c2kip$35l@accursio.comune.bologna.it> pod1466@iperbole.bologna.it (Simone Colombara e Annarita P.) writes:
- >>From: pod1466@iperbole.bologna.it (Simone Colombara e Annarita P.)
- >>Subject: Silly problem with Supra FaxModem
- >>Date: Sat, 30 Dec 1995 05:58:23 GMT
-
- >>Sorry for my english!
-
- >>I've got an external SupraFaxModem V32Bis modem.
- >>Using it as usually with dos communications programs to download files
- >>and mail from Fidonet, I receive a lot of "CRC error" and CPS slow
- >>down from 1600 to about 800.
- >>Since the problem've started (yes, there were a time with no
- >>problems...), I've changed communication program, cables, and even the
- >>serial card!
- >>A friend of mine has also tryed the modem on his computer, without any
- >>problem.
-
- >>Well, I've discovered that, opening a dos shell under windows,
- >>launching the same dos communication program and with the same modem
- >>configuration, the download goes well and CPS stand on 1600-1650.
-
- >>Have you any reason for that?
-
-
-
- >>
- >>e-mail pod1466@iperbole.bologna.it (Simone Colombara e Annarita P.)
-
- >Just a guess - but could it be that under real DOS you have a problem
- >initializing your UART 16550 buffer? That means a comm driver problem. 14.4
- >modems - using data compression - need the 16bit FIFO bufffer in the 16550
- >UART chip in order not to outstrip incoming data stream. In Windows - with a
- >recent COMM.DRV or replacement - the UART buffer is taken care of
- >automatically. In DOS it may be a different story. If the buffer is not
- >initialized and configured at the start of your modem session, you may well
- >get dropped information and all sorts of weird stuff. A least at high speeds.
-
- >Bob.
- >-------------------------------------------------------------
- >Robert Goldschmidt, Ph.D.
- >Sr. Systems Analyst - Designer
- >National Institutes of Health
- >Office of Extramural Research
- >Email: rcgoldschmidt@nih.gov
- As Bob says, it's the FIFOs in your UART. I read Curt's response also
- and his site has good info, but one thing I find lacking wherever I
- look is how to set the UARTs in DOS alone, such as what you are trying
- to do.
-
- I had once found shareware called FEEFIFO that claimed to do this in
- DOS alone, but unfortunately discovered that I couldn't use it because
- it was hobbled to only address COM1. You might do a search on FEEFIFO
- and maybe it will help you.
-
- Lastly, the best modem web site I have found is:
-
- http://web.aimnet.com/~jnavas/modem/faq.html
-
- Then again, someone who is trying to use DOS, and went into windows to
- circumvent a communications problem, might not even HAVE a Web
- browser.
-
- Make sure to come back and tell us what the fix was.
-
-
-
-