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Date: Thu, 21 Nov 1996 15:53:26 +0900 (JST)
From: Naoki Hamada <nao@sbl.cl.nec.co.jp>
Message-Id: <199611210653.PAA21634@sirius.sbl.cl.nec.co.jp>
References: <199611210613.PAA13017@th.phys.titech.ac.jp>
To: FreeBSD-users-jp@jp.freebsd.org
In-reply-to: Takashi Inoue's message of "Thu, 21 Nov 1996 15:13:02 +0900"
	     <199611210613.PAA13017@th.phys.titech.ac.jp>
Reply-To: FreeBSD-users-jp@jp.freebsd.org
X-Distribute: distribute [version 2.1 (Alpha) patchlevel=19]
X-Sequence: FreeBSD-users-jp 6630
Subject: [FreeBSD-users-jp 6630] Re: DMA? bus master?
Errors-To: owner-FreeBSD-users-jp@jp.freebsd.org
Sender: owner-FreeBSD-users-jp@jp.freebsd.org

$B$O$^$@$G$9!#(B

  $B$Y$D$K>\$7$$$o$1$8$c$J$$$G$9$,!#(B

$B0f>e$5$s(B:
>   $B$3$N!"$$$o$f$k!V%P%9%^%9%?!<E>Aw!W$G$9$,!"(B
>   $B;d$O!"K\Mh$N0UL#$N(B DMA $BE>Aw$KF~$C$F$7$^$&$H;W$&$N$G$9$,!"(B
>   $B$3$NM}2r$O4V0c$C$F$k$G$7$g$&$+!)(B $B!d(B $B>\$7$$J}(B

  DMA $B$H$$$&$N$O!"(BCPU $B$r2p$5$J$$%a%b%j%"%/%;%9$N$3$H$G!"%a%b%j4VE>Aw$@$C(B
$B$?$j<~JU5!4o$H%a%b%j$N4V$NE>Aw$@$C$?$j$7$^$9$M!#(B

  $B$G!"(BCPU $B$N$+$o$j$K%P%9$r$K$.$k$N$,(B DMA $B%3%s%H%m!<%i$@$C$?$j!"<~JU5!(B
$B4o$=$N$b$N$@$C$?$j$9$k$o$1$G!#(B

  $B$H$$$&$o$1$G!"!V%P%9%^%9%?!<E>Aw!W$O(B DMA $BE>Aw$N0l<o$G$9$h$M!#(B


  ISA($B$"$k$$$O(B C-BUS?) $B$,$G$-$?$P$+$j$N$3$m$O!"(BCPU $B$,$N$m$+$C$?$N$G(B 
DMA $B%3%s%H%m!<%i$K$h$k<~JU5!4o$H%a%b%j$N4V$NE>Aw$O=<J,Aa$+$C$?$o$1$G$9(B
$B$,!"(BCPU $B$,$a$A$c$/$A$c$K9bB.$K$J$C$F!":#$H$J$C$F$O$+$?$D$`$j$5$s$K$J$C(B
$B$F$7$^$C$?!"$H!#(B

  $B$A$J$_$K!"(BCPU $B$,<~JU5!4o$H%a%b%j$N4V$r$H$j$b$C$FE>Aw$9$k>l9g$O(B PIO
(Process I/O) $BJ}<0$H8F$V$_$?$$$G$9$M!#(B

>   $B%P%9%^%9%?!<$H(B DMA $B$G$OBPHf8l$K$J$C$F$J$$5$$,$7$^$9!#(B
>   $B$3$3$G8@$C$F$k(B DMA $B$K$U$5$o$7$$L>A0$,$J$$$N$G$7$g$&$+!)(B

  $B87L)$J$3$H$r8@$$=P$9$H$-$j$,$J$$$N$G!"(BPC98 $BMQ8l$H$$$&$3$H$G$h$m$7$$(B
$B$N$G$O$J$$$G$7$g$&$+!#(B

$BIMED(B $BD><y(B
