Path: utzoo!mnetor!uunet!husc6!hao!ames!ucbcad!ucbvax!CORY.BERKELEY.EDU!dillon
From: dillon@CORY.BERKELEY.EDU (Matt Dillon)
Newsgroups: comp.sys.amiga
Subject: Re: Serial port expansion
Message-ID: <8801120538.AA06381@cory.Berkeley.EDU>
Date: 12 Jan 88 05:38:23 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Lines: 17


	The *real* problem is character loss.  If I disable task switching
I can read a 76.8Kbaud line with only one or two overruns every 30 seconds.
Needless to say, if I disable interrupts there would be no problems at all.

	IBM PC's don't have this problem 'cause nobody ever goes above
9600 baud, and do not usually use more than one port at a time anyway.
However, *I* like to go quite a bit faster...

	So *anybody* planning to do a multiple serial port expansion should
consider using a single chip microcomputer to buffer the data.  These are
not slow devices! and could easily handle, say, four 76.8KBaud lines each.

	In the DEC world this is known as SILOing.


				-Matt