Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!munnari.oz.au!metro!natmlab.dap.csiro.au!ditsydh.syd.dit.CSIRO.AU!evans
From: evans@syd.dit.CSIRO.AU (Bruce.Evans)
Newsgroups: comp.sys.nsc.32k
Subject: Re: zmodem, arc
Message-ID: <1990Nov15.054411.7951@syd.dit.CSIRO.AU>
Date: 15 Nov 90 05:44:11 GMT
References: <9011111208.AA18526@echo.canberra.edu.au>
Organization: CSIRO Division of Info Tech, Sydney, Australia
Lines: 18

In article <9011111208.AA18526@echo.canberra.edu.au> eyal@echo.canberra.edu.au (Eyal Lebedinsky) writes:
>BTW, any reason why speeds higher than 9600 should not be added to the
>serial driver? (apart from compatibility with mainstream minix).

The PC mainstream allows 19200. When I want more (usually for transferring
to another machine) I edit the device registers and/or a couple of bytes in
the running device image ;-) to give 115200. I have been waiting for
someone to do the POSIX termios.h interface before doing it better. POSIX
seems to encourage a limited range of speeds with the usual Bxxx defines :(.

I like zmodem too. However, at high speeds its performance is greatly impeded
by blocking i/o - it does not stream. It needs the stuff controlled by #ifdef
READCHECK for decent performance. This is available with the 1.5 tty driver
plus a simple change.

Bruce
-- 
Bruce Evans		evans@syd.dit.csiro.au