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>Linux I/O $B%]!<%H%W%m%0%i%_%s%0(B mini-HOWTO</TH
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>9. $B%W%m%0%i%`$NNc(B</A
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>$B$3$l$O!"(BI/O $B%]!<%H%"%/%;%9$NC1=c$J%3!<%G%#%s%0Nc$G$9(B:</P
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>/*
* example.c: $B$H$C$F$b4JC1$J%]!<%H(BI/O$B$NNc(B
*
* $B$J$K$bLr$K$?$D$3$H$O$7$F$$$^$;$s!#%]!<%H$K=q$-9~$_!"0l;~Dd;_$7$F!"(B
* $B%]!<%H$+$iFI$_=P$9$@$1$G$9!#!V(Bgcc -O2 -o example example.c$B!W$G(B
* $B%3%s%Q%$%k$7$F!"%k!<%H%f!<%6$K$J$C$F!V(B./example$B!W$G<B9T$7$F$/$@$5$$!#(B
*/
#include <stdio.h>
#include <unistd.h>
#include <asm/io.h>
#define BASEPORT 0x378 /* lp1 */
int main()
{
/* $B%]!<%H$X$N%"%/%;%95v2D$rF@$k(B */
if (ioperm(BASEPORT, 3, 1)) {perror("ioperm"); exit(1);}
/* $B%]!<%H$N%G!<%?(B (D0-D7)$B$rA4$F(B low (0) $B$K$9$k(B */
outb(0, BASEPORT);
/* $B$7$P$i$/$N4V(B (100 ms) $B%9%j!<%W(B */
usleep(100000);
/* $B%9%F!<%?%9%]!<%H(B (BASE+1) $B$+$iFI$_=P$7$F!"I=<($9$k(B */
printf("status: %d\n", inb(BASEPORT + 1));
/* $B$b$&%]!<%H$r;H$o$J$$$N$G8e;OKv(B */
if (ioperm(BASEPORT, 3, 0)) {perror("ioperm"); exit(1);}
exit(0);
}
/* example.c $B$*$o$j(B */</PRE
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