home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!ogicse!qiclab!leonard
- From: leonard@qiclab.scn.rain.com (Leonard Erickson)
- Newsgroups: comp.dcom.modems
- Subject: Re: 16550A UART VS BNU
- Message-ID: <1992Aug22.060709.19957@qiclab.scn.rain.com>
- Date: 22 Aug 92 06:07:09 GMT
- Article-I.D.: qiclab.1992Aug22.060709.19957
- References: <Bt39ID.1z3@undergrad.math.waterloo.edu> <1992Aug20.153810.15758@qiclab.scn.rain.com> <20AUG92.20901820.0032@vmxa.polymtl.ca>
- Reply-To: 70465.203@compuserve.com
- Organization: SCN Research/Qic Laboratories of Tigard, Oregon.
- Lines: 21
-
- CT61 <CT61@polytec1.polymtl.ca> writes:
-
- >>>By the way, what's the big diff. between a 450 and 550A?
- >>
- >>The only real difference is that the 16550A has a 16-byte buffer on
- >>both the send and receive. The 16450 only keeps the *last* byte. So if you
- >>don't fetch it before the next one comes in, it's gone...
- >>
- >----------------------------------------------------------------------
- >What's different if I use a BNU prog instead of this 16550A ???
- >======================================================================
-
- The 16550 is needed to keep data from being lost at the UART. Using
- BNU or X00 won't help, because the characters will have been lost
- *before* they got a chance at them.
-
- --
- Leonard Erickson leonard@qiclab.scn.rain.com
- CIS: [70465,203] 70465.203@compuserve.com
- FIDO: 1:105/51 Leonard.Erickson@f51.n105.z1.fidonet.org
- (The CIS & Fido addresses are preferred)
-