Path: utzoo!attcan!uunet!lll-winken!ames!mailrus!csd4.milw.wisc.edu!nic.MR.NET!umn-d-ub!rutgers!cbmvax!jesup
From: jesup@cbmvax.UUCP (Randell Jesup)
Newsgroups: comp.sys.amiga.tech
Subject: Re: Multiple Serial Ports
Message-ID: <5712@cbmvax.UUCP>
Date: 18 Jan 89 04:00:55 GMT
References: <8812150227.AA09671@postgres.Berkeley.EDU> <14049@oberon.USC.EDU> <554@sunkisd.CS.Concordia.CA> <3241@sugar.uu.net> <147@ziggy.UUCP> <373@madnix.UUCP> <150@ziggy.UUCP> <385@madnix.UUCP> <154@ziggy.UUCP> <347@antares.UUCP>
Reply-To: jesup@cbmvax.UUCP (Randell Jesup)
Organization: Commodore Technology, West Chester, PA
Lines: 16

In article <347@antares.UUCP> jms@antares.UUCP (Joe Smith) writes:
>Some older terminals
>will lose data if the host sends more than 3 characters after the terminal
>sends XOFF.  Here is where having a FIFO on the input side of the UART can
>work against you.  And it's even worse if the DMA on the output side of the
>UART cannot be quickly disabled.  Very nasty to have 16 characters sent to
>the terminal after it says to stop.

	Nothing should require immediate response to ^S.  By it's very nature,
a number of characters may have already been sent/queued, and the host repsonse
time may vary.

	If you need immediate response, use CTS/RTS.

-- 
Randell Jesup, Commodore Engineering {uunet|rutgers|allegra}!cbmvax!jesup