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- Path: sparky!uunet!ogicse!qiclab!leonard
- From: leonard@qiclab.scn.rain.com (Leonard Erickson)
- Newsgroups: comp.dcom.modems
- Subject: Re: 16550 vs. 16550AFN
- Message-ID: <1992Aug22.060307.19838@qiclab.scn.rain.com>
- Date: 22 Aug 92 06:03:07 GMT
- Article-I.D.: qiclab.1992Aug22.060307.19838
- References: <1992Aug18.221918.1@vax1.umkc.edu> <BtAt51.JD8@news.cso.uiuc.edu>
- Reply-To: 70465.203@compuserve.com
- Organization: SCN Research/Qic Laboratories of Tigard, Oregon.
- Lines: 23
-
- berger@atropa (Mike Berger) writes:
-
- >It's not even something you should worry about. The concern is that
- >the modem has to keep up with the maximum data throughput rate. If
- >you use an external modem, then your computer's hardware (your serial
- >port) has to be able to handle the data rate. When you use an
- >internal modem, you eliminate that potential bottleneck. Who cares
- >what kind of uart is used on an internal modem (or indeed, that one
- >is used at all)? If the modem can handle the maximum data rate,
- >then a different uart chip will make no difference at all. A modem
- >doesn't have to emulate a 16550AFN to have buffering on board.
-
- Excuse me? The software that is fetching the bytes doesn't act
- *at all* differently if the modem is internal. The PC *still*
- has to go thru a UART to get the data from the modem! The
- bottelneck still exists.
-
-
- --
- Leonard Erickson leonard@qiclab.scn.rain.com
- CIS: [70465,203] 70465.203@compuserve.com
- FIDO: 1:105/51 Leonard.Erickson@f51.n105.z1.fidonet.org
- (The CIS & Fido addresses are preferred)
-