lane@cs.dal.ca (John Wright/Dr. Pat Lane) (06/02/90)
I am interested in serial ports using the new 16550 UART chip:
What is the difference between this chip and the 16450 chip used in most
AT I/O cards? What are the advantages/disadvantages in using this chip?
Can one simply pop in a 16550 in place of a 16450 or should one get an
I/O card specifically designed for this chip?
Where can I get an I/O card using the 16550? I would like a card with
2 serial ports, a parallel port and a game port. Who manufactures such
a card and who sells them in North America - preferably in Canada?
Please reply by mail or send me a copy of any followup postings as I
can't keep up with the flood of news and things often get deleted before
I see them. Many thanks for any help on this.
--
John Wright ////////////////// Phone: 902-424-3805 or 902-424-6527
Post: c/o Dr Pat Lane, Biology Dept, Dalhousie U, Halifax N.S., CANADA B3H-4H8
Cdn/Eannet:lane@cs.dal.cdn Uucp:lane@dalcs.uucp or {uunet watmath}!dalcs!lane
Arpa:lane%dalcs.uucp@uunet.uu.net Internet:lane@cs.dal.cashim@zip.eecs.umich.edu (Sam Shim) (06/02/90)
In article <1990Jun1.175846.16111@cs.dal.ca> lane@cs.dal.ca (John Wright/Dr. Pat Lane) writes: >I am interested in serial ports using the new 16550 UART chip: > >What is the difference between this chip and the 16450 chip used in most >AT I/O cards? What are the advantages/disadvantages in using this chip? > >Can one simply pop in a 16550 in place of a 16450 or should one get an >I/O card specifically designed for this chip? > >Where can I get an I/O card using the 16550? I would like a card with >2 serial ports, a parallel port and a game port. Who manufactures such >a card and who sells them in North America - preferably in Canada? > >Please reply by mail or send me a copy of any followup postings as I >can't keep up with the flood of news and things often get deleted before >I see them. Many thanks for any help on this. > >-- >John Wright ////////////////// Phone: 902-424-3805 or 902-424-6527 >Post: c/o Dr Pat Lane, Biology Dept, Dalhousie U, Halifax N.S., CANADA B3H-4H8 >Cdn/Eannet:lane@cs.dal.cdn Uucp:lane@dalcs.uucp or {uunet watmath}!dalcs!lane >Arpa:lane%dalcs.uucp@uunet.uu.net Internet:lane@cs.dal.ca The 16550 is less buggy and has a bigger buffer than the 16450 and the 8450 (I think that's the number). There's also a 82450 (I think) UART chip which is similar to the 8450. The 16550 also has a few other features, but I can't recall them off the top of my head. It's competely backward compatible with the other 3 UART chips so you can get pop out an oler UART chip and put in the 16550. That's what I did. You don't need a special i/o card. Some comm software such as DSZ and Telix (I think only when you shell to DOS) take advantage of it. I hope you don't mind me posting it since there has been another question about UART chips lately. ----------------------------------------------------------------------------- | Sam Shim | "I didn't do it... | | EECS Departmental Computing Organization | It wasn't me... | | University of Michigan | Nobody saw me do it... | | Ann Arbor, MI 48109 | Nobody can prove a thing..." | | internet: shim@eecs.umich.edu | - Bart Simpson | -----------------------------------------------------------------------------
ken@nsc.nsc.com (Kenneth Trant) (06/02/90)
From article <2481@zipeecs.umich.edu>, by shim@zip.eecs.umich.edu (Sam Shim):
$ In article <1990Jun1.175846.16111@cs.dal.ca> lane@cs.dal.ca (John Wright/Dr. Pat Lane) writes:
$>I am interested in serial ports using the new 16550 UART chip:
$>
$>What is the difference between this chip and the 16450 chip used in most
$>AT I/O cards? What are the advantages/disadvantages in using this chip?
$>
$ -----------------------------------------------------------------------------
The 16550 has FIFO buffers so they handle much higher thru-put.
Ken Trant