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- Path: sparky!uunet!valinor.mythical.com!n5ial!jim
- From: jim@n5ial.mythical.com (Jim Graham)
- Newsgroups: comp.dcom.modems
- Subject: Can I upgrade a 16450 uart to a 16550a?
- Message-ID: <726768660snx@n5ial.mythical.com>
- Date: Mon, 11 Jan 93 16:11:00 GMT
- References: <2To7wB1w165w@halcyon.com>
- Distribution: world
- Organization: Me? Organized? Hah! :-)
- Lines: 45
-
- In article <2To7wB1w165w@halcyon.com> puma writes:
-
- > jim@n5ial.mythical.com (Jim Graham) writes:
- > >
- > > usually (and there are exceptions), sales droids don't have a clue about
- > > these things. the guy you talked to probably doesn't know the
- > > difference between a UART and a toaster, and just pulled out a term
- > > (VLSI) that he'd heard in the past somewhere. :-)
-
- > He likely was correct, many systems don't use "real" UARTS, they use
- > a VLSI chip that is programmed to emulate the uarts and other parts.
-
- yes, but the original poster said specifically that this chip *IS* a
- 16450. not a clone in a multi-function VLSI chip, a 16450, period.
- the sales droid said it was a VLSI, while the original poster had
- already determined it to be a 16450 (I'm assuming he knows how to read
- the identification off a chip).
-
- if I look at a chip, and the type designation on the label says it's
- a 16450 (especially if it's in the familiar 40-pin DIP package), while
- a sales droid tells me it's something else, my visual inspection of the
- chip wins. sorry.
-
- > *flame on* - Why bother talking with your manufacturer who "doesn't
- > have a clue," when you can talk with an equally clueless person on
- > the net.
- > *flame off*
-
- flame away all you want, but it doesn't change the wording of the data
- sheets I've got sitting right here in front of me. the question asked
- was if the 16450 could be replaced with a 16550. the answer is yes,
- it can. the data sheets tell us we can do this. I've done it. others
- have also done it. it works. I guess National Semiconductor is
- clueless, too?
-
- --jim
-
- --
- #include <std_disclaimer.h> 73 DE N5IAL (/4)
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