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>3. $B3d$j9~$_(B (IRQ) $B$H(B DMA $B%"%/%;%9(B</A
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>$B%f!<%6%b!<%I$N%W%m%0%i%`$+$iD>@\$K3d$j9~$_$d(B DMA $B$r;H$&$3$H$O$G$-$^$;$s!#(B
$B$3$l$K$O!"%+!<%M%k%I%i%$%P$r:n@.$9$kI,MW$,$"$j$^$9!#$=$N>\:Y$K$D$$$F$O(B
<A
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>$B!V(BLinux $B%+!<%M%k%O%C%+!<%:(B $B%,%$%I!W(B</A
>$B$r!"$^$?$=$NNc$H$7$F$O!"%+!<%M%k$N(B
$B%=!<%9%3!<%I$rFI$s$G2<$5$$!#(B</P
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>$B%f!<%6%b!<%I$N%W%m%0%i%`$+$i3d$j9~$_$r6X;_$9$k$3$H$O!"4m81$rH<$$$^$9$,!"(B
$B2DG=$G$9!#(B($B%+!<%M%k%I%i%$%P$G$9$i$=$l$r<B9T$9$k$H$-$O$G$-$k8B$jC;$$;~4V(B
$B$G$9$k$b$N$G$9!#(B)
<TT
CLASS="FUNCTION"
>iopl(3)</TT
> $B$r8F$S=P$7$?$"$H!"(B<TT
CLASS="FUNCTION"
>asm("cli");</TT
> $B$r8F$S=P$9$@$1$G3d$j9~$_$r6X;_$9$k$3$H$,$G$-$^$9!#(B
$B:F$S3d$j9~$_2DG=$K$9$k$K$O(B <TT
CLASS="FUNCTION"
>asm("sti")</TT
> $B$r(B
$B8F$S$^$9!#(B</P
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>C $B%W%m%0%i%`$+$i(B I/O $B%]!<%H$r;H$&(B</TD
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