From owner-doc-jp@jp.freebsd.org  Mon Aug 26 17:25:05 1996
Received: by mail.jp.freebsd.org (8.7.3+2.6Wbeta5/8.7.3) id RAA14057
	Mon, 26 Aug 1996 17:25:05 +0900 (JST)
Received: by mail.jp.freebsd.org (8.7.3+2.6Wbeta5/8.7.3) with SMTP id RAA14052
	for <doc-jp@jp.freebsd.org>; Mon, 26 Aug 1996 17:25:02 +0900 (JST)
Received: from sonygw.sony.co.jp ([43.0.1.249]) by sonyinet.sony.co.jp (8.6.10/3.4W4-96030410) with ESMTP id RAA06170 for <doc-jp@jp.freebsd.org>; Mon, 26 Aug 1996 17:24:41 +0900
Received: from s64.saskg.semicon.sony.co.jp ([43.0.234.82]) by sonygw.sony.co.jp (8.6.12+2.4W/3.4W-96071914) with ESMTP id RAA22276 for <doc-jp@jp.freebsd.org>; Mon, 26 Aug 1996 17:24:23 +0900
Received: from s64 by s64.saskg.semicon.sony.co.jp (8.7.4+2.6Wbeta6/3.4W5-Mimoric1.2-MX)
	id RAA17818; Mon, 26 Aug 1996 17:24:30 +0900 (JST)
Message-Id: <199608260824.RAA17818@s64.saskg.semicon.sony.co.jp>
To: doc-jp@jp.freebsd.org
Cc: saeki@saskg.semicon.sony.co.jp
Date: Mon, 26 Aug 1996 17:24:30 +0900
From: Takashi Saeki <saeki@saskg.semicon.sony.co.jp>
Reply-To: doc-jp@jp.freebsd.org
X-Distribute: distribute [version 2.1 (Alpha) patchlevel=19]
X-Sequence: doc-jp 517
Subject: [doc-jp 517] Please suggest to me. (uart.sgml)
Errors-To: owner-doc-jp@jp.freebsd.org
Sender: owner-doc-jp@jp.freebsd.org

$B:4Gl!w%=%K!<$G$9!#(B

uart.sgml $B$rLu$7$F$$$^$9$,!">/!9$*CN7C$r$*B_$7$/$@$5$$!#(B
# $B:#D+$K$O(B ML $B$KN.$7$?$$$H;W$C$F$$$?$N$G$9$,!"$A$H4V$K9g$$$^$;$s$G$7$?!#(B


1. Constellation Stuffing $B$NLu8l$K$D$$$F(B

   380 $B9TL\$+$i!'(B
	                          High speed modem are able to encode more
	bits of data into each Symbol using a technique called Constellation
                                                               ~~~~~~~~~~~~~
	Stuffing, which is why the effective bits per second rate of the
        ~~~~~~~~
	modem is higher, but the modem continues to operate within the
	limited audio bandwidth that the telephone system provides.

   $B$*$=$i$/<~GH?tB?=E2=$K4X$9$k8@MU$@$H;W$&$N$G$9$,!"$b$7$+$7$FDjLu$,$"$C$?$j(B
   $B$7$^$9$G$7$g$&$+!):#$N$H$3$m!V%3%s%9%F%l!<%7%g%s!&%9%?%C%U%#%s%0!W$H(B
   $B$7$F$$$^$9!#(B


2. race conditions $B$NLu8l$K$D$$$F(B

   421 $B9TL\$+$i!'(B
	The 8250 uses eight I/O ports and has a one-byte send and
	a one-byte receive buffer.  This original UART has several
	race conditions and other flaws. 
        ~~~~~~~~~~~~~~~
   $B6qBNE*$JFbMF$,=q$$$F$J$$$N$GNI$/$o$+$j$^$;$s$,!"(B
   $BAw?.$H<u?.$,F1;~$K5/$3$k$H;I$5$k$H$+$$$&;v$G$7$g$&$+!)(B
   # $B$"$$$K$/(B 8250 $B$N%P%0$K4X$9$kCN<1$,$J$$$b$N$G!D!D(B (^_^;
   $B!V6%9g$K4X$9$k@)Ls!W$G$O$I$&$+$J$H;W$C$F$$$k$N$G$9$,!D!D(B


3. RS232-C $B$K$D$$$F(B

   $B$3$N%I%-%e%a%s%H$G$O(B RS232-C $B$H=q$+$l$F$$$k$N$G$9$,!";d$,CN$kHO0O$G$O(B
   $B!JF|K\$G$O!K(BRS-232C $B$H$$$&I=5-$,9-$/;H$o$l$F$$$k$h$&$K;W$$$^$9!#(B
   s/RS232-C/RS-232C/ $B$7$F$7$^$$$?$$$H;W$&$N$G$9$,!"$I$s$J$b$N$G$7$g$&!)(B


$B:G8e$K$J$C$F?=$7Lu$"$j$^$;$s$,!"(B

[doc-jp 506]  iwasaki@pc.jaring.my $B$5$s!'(B

> $B$*4j$$$7$^$9!#(B(1)$B$N7o$OB?J,:Q$^$7$F$$$k$H;W$$$^$9$N$G!"(B(2)$B$NJ}$b(B
> $B$D$$$G$K$*4j$$$7$^$9!#(B
>
$BN;2r$7$^$7$?!#(B

--------------------------------------------------------------------
    $B:4GlN4;J(B  $B%=%K!<3t<02q<R!!%;%_%3%s%@%/%?%+%s%Q%K!<(B
              $BBh#1#L#S#IItLg!!@_7W5;=QIt!!5;=Q?d?J2]!!O@M}#C#A#D78(B
              E-mail : saeki@saskg.semicon.sony.co.jp
--------------------------------------------------------------------
