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- Path: news.MediaCity.com!not-for-mail
- From: brian@easy1.mediacity.com (Brian Litzinger)
- Newsgroups: comp.dcom.modems
- Subject: Re: Dos comms prog to handle over 115k ?
- Date: 16 Apr 1996 20:02:36 -0700
- Organization: http://www.MediaCity.com 415-843-6848
- Message-ID: <4l1n0c$mtp@easy1.mediacity.com>
- References: <31696b50.18183496@news.demon.co.uk> <4kdkhp$aq@nnrp1.news.primenet.com> <316ae0ed.447158@news.demon.co.uk> <pumaDpwMMD.FJL@netcom.com>
- NNTP-Posting-Host: easy1.mediacity.com
-
- >>>john@gtbar.demon.co.uk wrote:
- >>>: Can any one recommend a dos prog that can handle 230k or above, all
- >>>: the ones I have will not allow over 115k, I want to use a direct
- >>>: connection to another pc.
-
- In article <pumaDpwMMD.FJL@netcom.com>, Gary Breuckman <puma@netcom.com> wrote:
- >What everyone is ignoring here, even though it's been said several times,
- >is that the design specs of the 16550 UART and the clock circuits that
- >it uses are limited to 115.2K - it won't go faster. See now?
- >puma@netcom.com
-
- Long ago, I worked quite extensively with NS16550A UARTs. I do not
- recall them being limited to 115.2 kbaud. I remember that the IBM PC
- serial port was limited to 115.2 kbaud due to the choice of a
- 1.8432MHz (or 18.432Mhz?) master clock to drive the UART and the divisors
- that are available within the UART.
-
- Using a different clock, as I recall, one could generate different and
- faster baud rates. Hence the limitation was not in the UART itself.
-
- Brian Litzinger
- brian@mediacity.com
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