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- From: davidg@aegis.or.jp (Dave McLane)
- Newsgroups: comp.dcom.modems
- Subject: Re: Can I upgrade a 16450 uart to a 16550a?
- Message-ID: <3596@aegis.or.jp>
- Date: 9 Jan 93 01:58:11 GMT
- References: <1993Jan7.152939.28987@wam.umd.edu> <1993Jan7.211441.1411@spectrum.CMC.COM>
- Sender: daemon@aegis.or.jp
- Lines: 38
-
- lars@spectrum.CMC.COM (Lars Poulsen) writes:
-
- >In article <1993Jan7.152939.28987@wam.umd.edu>
- > joel@wam.umd.edu (Joel M. Hoffman) writes:
- >>I just purchased a high speed modem (14.4K from Boca) for my Dell
- >>325D. ... Dell ... uart ... turns out it's a 16450. ... I'm losing
- >>char.s with high-speed transfers, especially with a loaded machine
- >>...
- >>Is it possible to upgrade the 16450 to a 16550a?
- >>...
- >>[I tried asking the representative a Dell, but, when he answer my
- >>question of "What kind of uart is in the machine" with "You have a
- >>VLSI chip," I gave up.]
-
- >The answer is that you don't have a 16450 UART - you have a simulation
- >of one (or two) on a custom-made chip, probably together with a parallel
- >port. You are stuck with what you have.
-
- I also have a Dell 325D and was told the chip also does handles the
- printer and keyboard.
-
- >If you are only going to use the modem with the PC, it would have been
- >cheaper to disable the serial port that you are now using, and
- >installing an internal modem instead. It would have had the buffering
- >built in ...
-
- No need to disable the port, if you add an internal modem or an
- add-on card the 325D will automatically disable itself (assuming the
- BIOS options are default).
-
- I installed a 2-port card with 2 X 16550AFN chips on it and it works OK.
-
- Dave
-
- --
- Dave McLane
- JUNET: davidg@aegis.or.jp (ONLY within Japan: post otherwise)
- Nagaokakyoshi, Kyoto Japan Tel: +81-75-951-1168 Fax: +81-75-957-1087
-