home *** CD-ROM | disk | FTP | other *** search
- Path: news.med.ge.com!nuge
- From: nuge@ct.med.ge.com (James A. Nugent)
- Newsgroups: comp.dcom.modems
- Subject: Re: Does any 28.8 modem have a built-in 16650UART chip
- Date: 16 Apr 1996 19:02:33 GMT
- Organization: GE Medical Systems, Milwaukee, WI
- Distribution: world
- Message-ID: <NUGE.96Apr16140233@newport.ct.med.ge.com>
- References: <4ka0cb$5m7@newshound.csrv.uidaho.edu> <4kouq7$cdk@news.xs4all.nl>
- <4ks998$pbb@news.tricon.net>
- NNTP-Posting-Host: 3.7.72.3
- In-reply-to: cooperst@tricon.net's message of Mon, 15 Apr 96 01:35:20 GMT
-
- In article <4ks998$pbb@news.tricon.net> cooperst@tricon.net (Mark
- Cooperstein) writes:
-
- > why would any internal modem need a UART 16550/16650?? A
- > uart is a device that can change serial data to parallel data.
- > External modems need UARTS, internal modems should not as they are
- > already sitting on a parallel bus!!
-
- The computer expects to be talking to a UART when it acesses a serial
- port. An internal modem implements both the port as well as the modem,
- hence it must contain or at least emulate a UART.
-
- External modems NEED a UART at the other (computer) end of the RS232
- connection. Thus they cannot contain the UART that is accessed by the
- computer.
-
- >
- > Mark
- --
- Jim Nugent
-
- nuge@ct.med.ge.com
-
- nugentj@ct.med.ge.com
-