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To: FreeBSD-users-jp@jp.freebsd.org
In-reply-to: Your message of Wed, 14 May 97 07:25:59 JST.
             <199705132227.HAA13501@jaz.jp.freebsd.org> 
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Date: Wed, 14 May 1997 21:10:00 +0900
From: Akihiro Hirano <hirano@dsp.cl.nec.co.jp>
Reply-To: FreeBSD-users-jp@jp.freebsd.org
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Subject: [FreeBSD-users-jp 12938] E-IDE FAQ (Was: FAQ page)
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Sender: owner-FreeBSD-users-jp@jp.freebsd.org

$BJ?Ln(B@NEC$B$G$9!#(B

$B!!3'MM!"$$$m$$$m$J>pJs$"$j$,$H$&$4$6$$$^$9!#(B

$B!Z?@J]$5$s![(B
> $B?@J]$G$9!#$;$C$+$/$G$9$N$G!"Bg@P$5$s$N;XE&$r<h$j9~$s$G(B
> rewrite & append$B$7$F$*$-$^$9$+!#(B

>   $B7k6I(BPC98$B$N>l9g!"(B20MB,40MB,80MB,120MB,233MB,500MB,544MB,
> (2.1GB),4.4GB$B$N@)8B$,$"$k$3$H$K$J$j$^$9!#0U30$HB?$$$G$9$M!#(B

$B!!$[$H$s$I$=$N$^$^:NMQ$5$;$FD:$-$^$7$?!#(B

$B!ZBg@P$5$s![(B
> PC98$B$H(BAT$B8_495!$G$N(BIDE/E-IDE$B5!4o$N07$$$N0c$$$C$F;v$G0JA0(BNIFTY$B$K=q$$$?FbMF(B
> $B$r<c43JQ99$7$FIU$1$F$*$-$^$9!#$3$s$J$N$^$G$$$l$F$7$^$&$H!"(B98$B$N(BIDE$B5!4o@\B3(B
> $B9V:B$_$?$$$K$J$C$F$7$^$&MM$J5$$,$9$k$N$G!":NMQ$9$k$+$I$&$+$O$*G$$;$7$^$9!#(B

$B!!A0H>$@$1:NMQ$5$;$FD:$-$^$7$?!#(B

$B!Z8^H?ED$5$s![(B
> $BMW$O(B BIOS $BB&$NLdBj$G$"$C$F!"(Bhardware $BE*$K$O(B secondary I/F $B$rA}@_$9$k$N(B
> $B$O2?$iLdBj$O$J$$H&$G$9!#$^$?!"(BE-IDE $BBP1~$K$9$k3HD%(B BIOS card$B!J(BEIDE MAX 
> $B$J$I!K$r@Q$a$P!"(Bsecondary I/F $B$b(B BIOS $B$G@)8f$9$k$3$H$,$G$-$k$G$7$g$&!#(B
> 
> $B!t(B $BA4@=IJ$rGc$$B7$($?$o$1$G$O$J$$$N$G!"A4$F$,$=$&$@$H$$$&3N>Z$O$"$j$^$;(B
> $B!t(B $B$s(B m(__)m$B!#(B

$B!!!V$=$&$$$&$N$,B?$$!W$H$$$&I=8=$G!"DI2C$5$;$FD:$-$^$7$?!#(B


$B!!$H$$$&$3$H$G!"8=:_$NHG$G$9!#(B
----
$BF|K\EE5$(B($B3t(B)$B>pJs%a%G%#%"8&5f=j?.9f=hM}8&5fIt!!J?Ln989((B
E-mail : hirano@dsp.CL.nec.co.jp      Tel : 8-272-3655

------------------------------------------------------------------------
IDE/Enhanced IDE (E-IDE) $B$K$D$$$F$N(BFAQ$B$G$9!#(B


$B!Z6&DL![(B
$B!{2?8N!"(BIDE$B%G%#%9%/$O:GBg(B504MB$B$J$N!)(B

$B!!(BIDE $B$N5,3J$G$O!"(B

        head      0-15 (!)
        sector    1-255
        cylinder  0-65535

$B$H$J$C$F$$$^$9!#(B1 sector = 512 bytes $B$J$N$G!":GBg(B130GB$B$NMFNL$K$J$j$^$9(B
($BCm(B: E-IDE$B$N4V0c$$$G$O$"$j$^$;$s(B!!)$B!#$=$l$KBP$7$F!"(BIBM/PC$B$N(BBIOS$B$O!"(B

        head      0-255
        sector    1-63 (!)
        cylinder  0-1023 (!)

$B$H$J$C$F$$$F!":GBg(B8GB$B$K$J$j$^$9(B($B$3$l$b!"(BE-IDE$B$N4V0c$$$G$O$"$j$^$;$s(B!!)$B!#(B
$B$G$O!"2?8N(B504MB$B$J$N$+!)>e5-$N$&$A!">.$5$$J}(B(!$B$rIU$1$?J}(B)$B$r<h$k$H!"(B

        head      0-15
        sector    1-63
        cylinder  0-1023

$B$G!"(B504MB$B$K$J$j$^$9!#(B   (-.-;;


$B!Z(B98$B![(B
$B!{(BPC-98XX$B$@$H!"$I$&$J$k$N$G$9$+!)(B

$B!!(BPC98$B$N(BBIOS$B$O!"(B

        head      0-255
        sector    0-255
        cylinder  0-65535

$B$H$J$C$F$$$^$9!#(B1 sector = 512 bytes $B$J$N$G!":GBg(B2TB(=2048GB)$B$NMFNL$K(B
$B$J$j$^$9!#$?$@$7(BIBM/PC$B8_495!$H$OJL$N;v>p$K$h$C$F!"(B540MB$B1>!9$NLdBj$,5/(B
$B$3$k>l9g$,$"$j$^$9!#(BPC-98XX$B$N>l9g$O!"(BBIOS$B$,AmMFNL$r7W;;$7$F!"$=$NMFNL(B
$B$K$h$C$F0J2<$N$I$A$i$+$NMFNL$HH=CG$7$^$9!#(B

(A) 8 head, 17 sectors $B$H8GDj$7!"A4MFNL!?(B(8*17)$B$r%7%j%s%@?t$H$9$k!#(B
    $B$3$N>l9g!"%G%#%9%/K\Mh$NMFNL$H<c43$N:9$,$G$k!#(B

(B) $BMFNL$K$h$C$F!"(Bxx head, xx sec, xx cyl $B$N0lIt!"$b$7$/$OA4$F$,(B
    $B8GDj$H$J$k!#$3$N>l9g!"%G%#%9%/MFNL$K$h$C$FL5BL$JNN0h$,Bt;3$G$k!#(B

$B!!$I$A$i$N%Q%?!<%s$,;H$o$l$k$+$O5!<o$dMFNL$K$h$C$F0c$$$^$9!#Nc$($P!"(B
Ap2$BEy$N5!<o$G$O!"(B800MB$B$N%G%#%9%/$b(B540MB$B$N%G%#%9%/$bF1$8>e5-(B(B)$B$N7W;;$r(B
$B9T$$!"F1$8%7%j%s%@?t$H$7$F07$C$F$7$^$$$^$9(B(^^;;$B$H$j$"$($:!"(B(B)$B07$$$N%G%#(B
$B%9%/$b(B(A)$B07$$$K$J$k$h$&$K$4$^$+$7$F$7$^$($P!"Bg$-$JMFNL$b07$($^$9!#(B


$B!Z(B98$B![(B
$B!{(BPC-98$B$K$O!"(B500MB$B$rD6$($kLdBj$OB8:_$7$J$$$N$G$9$M!)(B

$B!!B8:_$9$k5!<o$b$"$j$^$9!#:G6a$N(BPC-9821$B%7%j!<%:$O!"Bg>fIW$i$7$$$G$9$,!#(B
540MB$B0J>e$G%V!<%H$G$-$J$$$H$$$&LdBj$K4X$7$F$O!"(BIBM/PC$B$H$OJL$JLdBj$,$"$C(B
$B$F!"(BBIOS$BFb$N7W;;$G%P%0$C$F$k0Y(B(?)$B$K%"%/%;%9$G$-$J$$$H$$$&$3$H$G$9!#(B98
$BK\Mh$N(B(?)$B;EMM$G$O(B540MB$BLdBj$OH/@8$7$J$+$C$?$O$:$J$N$G$9$,!D(B

$B!!$^$?!"(B98$B$N>l9g$O(BBIOS$B$,(B8 heds, 17 sec$B$H8GDj$9$k$?$a$K!":GBg$G(B

     8 head x 17sec x 65535 cyl x 512 bytes = $BLs(B4.4GB

$B$H$$$&@)8B$,$"$j$^$9!#8=>u$G$O!"$3$NMFNL$,LdBj$H$J$k(BIDE$B$N%G%#%9%/$,$J(B
$B$$$N$G$9$,!"4{$K(B3GB$B%/%i%9$,B8:_$9$k;v$+$i;~4V$NLdBj$G$7$g$&!#$=$N$h$&(B
$B$J>l9g$K$O!"0JA0(B PC9801NS -> $B$=$l0J9_(B $B$G(B 4head -> 8head $B$NJQ99$,9T$o$l(B
$B$?;v$+$i!"$"$kMFNL0J>e$G$O(B 16 head $B$H$7$F7W;;$9$kEy$H$$$C$?JQ99$,9T$o(B
$B$l$k2DG=@-$,Bg$-$$$G$9!#(B

$B!!7k6I(BPC98$B$N>l9g!"5!<o$K$h$C$F$O!"(B20MB, 40MB, 80MB, 120MB, 233MB,
500MB, 544MB, (2.1GB), 4.4GB$B$N@)8B$,$"$k$3$H$K$J$j$^$9!#(B


$B!Z6&DL![(B
$B!{(BFreeBSD$B$G$b!"F1$8@)8B$,$"$k$N$G$9$+!)(B

$B!!(BFreeBSD$B$O!"%+!<%M%k$rFI$_=P$9;~$@$1!"(BBIOS$B$r;H$$$^$9!#$=$l0J8e$O!"(B
BIOS$B$r;H$o$:$K%G%#%9%/$NFI$_=q$-$r9T$J$$$^$9!#$7$?$,$C$F!"(BBIOS$B$,FI$a$k(B
$B>l=j$K!"%+!<%M%k$,CV$$$F$"$l$P!"Bg>fIW$G$9!#$3$l$,!"M#0l$N@)8B$G$9!#(B


$B!Z6&DL![(B
$B!{(BIDE$B$N>e8B$O(B528MB$B$C$FJ9$$$?$s$G$9$1$I!)(B

$B!!%O!<%I%G%#%9%/20$5$s$O!"(B

        1MB = 1,000,000 bytes

$B$H?t$($^$9!#0lJ}!"7W;;5!%f!<%6$O!"(B

        1MB = 1,024 $B!_(B 1,024 bytes
            = 1,048,576 bytes

$B$H?t$($^$9!#$5$F!"(BIDE$B$N5,3J$H(BBIOS$B$N;EMM$NHD64$_$G7h$^$C$?!"(B16 heads,
63 sectors, 1024 cylinders$B$J%G%#%9%/$N%5%$%:$O!"(B

        528,482,304 bytes

$B$G$9!#(B528MB$B$G$9$M!#(B1024$B!_(B1024$B$G3d$k$H!"$A$g$&$I!"(B

        504MB

$B$K$J$j$^$9!#(B


$B!Z6&DL![(B
$B!{(B540MB$B$N%G%#%9%/$C$F!)(B

$B!!$&!A$s!"Nc$($P!"(BWestern Digital$B$N(BAC2540$B$H$$$&%G%#%9%/$O!"(B16 heads,
63 sectors, 1048 cylinders$B$G$9!#$D$^$j!"(B 540,868,608 bytes $B$G$9!#<B$O(B
$B$3$N%G%#%9%/!"(B1024 cylinders$B$rD6$($F$$$^$9!#$A$g$C$HCm0U$,I,MW!#(B


$B!Z6&DL![(B
$B!{(BEnhanced IDE (E-IDE) $B$C$F2?!)(B

$B!!0J2<$N$h$&$J!"3HD%$5$l$?(BIDE$B$G$9!#(B

$B!&(B2$B7OE}(B $B!_(B 2$BBf$N:GBg(B4$B$NAuCV$r%5%]!<%H(B
$B!&(BHDD$B0J30$K$b(BCD-ROM$BEy$N@\B3$r%5%]!<%H(B (ATAPI CD-ROM)
$B!&$h$j9bB.$JE>Aw%b!<%I$r%5%]!<%H(B (PIO MODE3/4 $B$d(B DMA MODE 1/2)
$B!&BgMFNL%G%#%9%/$r%5%]!<%H(B

$B!!(B2$B7OE}$N%5%]!<%H$O!"%O!<%I%&%(%"$NLdBj$G$O$J$/!"(BBIOS$B$NLdBj$G$"$k$3$H(B
$B$,B?$$$h$&$G$9!#(BEnhanced$B$G$O$J$$(BIDE$B$G$"$C$F$b!"(B2$B7OE}L\$r@\B3$9$k$3$H$O(B
$B2DG=$G$9$,!"(BBIOS$B$,%5%]!<%H$7$J$$$h$&$G$9!#(BE-IDE$BBP1~$N(BBIOS$B$K$O!"(B2$B7OE}L\(B
$B$r%5%]!<%H$9$k$b$N$,B?$$$h$&$G$9!#(B

$B!!07$($k%G%#%9%/$N%5%$%:$K4X$7$F$O!"(Bgeometry$BJQ49$K$h$C$F!"Bg$-$J%G%#%9(B
$B%/$r07$($k$h$&$K$7$F$$$^$9!#$3$l$r!V(BE-IDE$BBP1~!W$H>N$7$F$$$k>l9g$,$"$j(B
$B$^$9!#(BLBA (Logical Block Access ?) $B$d(B Large Drive $B$H$$$&$N$O!"$3$N0lJ}(B
$B<0$G$9!#(B

$B!!(BLBA$B$O!"(BCylinder, Sector, Head $B$J$I$NJ*M}%Q%i%a!<%?$rD>@\;XDj$9$k$N$r(B
$B$d$a$F!"(BSCSI$B$N$h$&$K@hF,$+$i$$$/$D$a$N%V%m%C%/$H$$$&;XDj$r$9$kJ}<0$G$9!#(B
$BJ*M}%Q%i%a!<%?$,$I$&$J$k$+$O!"%G%#%9%/B&$K$^$+$;$^$9!#$=$b$=$b:G6a$N(B 
HDD $B$O!"%>!<%s%K%s%0$K$h$C$FFb<~$H30<~$G$O(Bcylinder$B$"$?$j$N(Bsector$B?t$,0c(B
$B$&$H$$$&$3$H$O%6%i$G$9$+$i!"(BCylinder, Sector, Head$B;XDj$O;v<B>e$[$\L50U(B
$BL#$K$J$C$F$$$^$9!#(B

$B!!$J$*!"(BBIOS$B$OAjJQ$o$i$:(BCylinder, Sector, Head$B$N;XDj$J$N$G!"(BLBA$BBP1~$N(B
BIOS$B$+$i$O!"(B

        $B%7%j%s%@?t$r(B2$B$G3d$C$F!"Be$o$j$KJL$N?t;z$r(B2$BG\$9$k(B

$B$N$h$&$K8+$($k$h$&$K$7$F!"(B1024 Cylinders$BLdBj$r2sHr$7$F$$$^$9!#(B


$B!Z(B98$B![(B
$B!{:G6a$N(B98$B$K$O!"(BIDE$B$,(B2$B7OE}$"$j$^$9$M!)(B

$B!!(B"$B%U%!%$%k%Y%$(B"$B$H8F$P$l$k(BHDD/CD-ROM$BEy3HD%MQ$N5!9=$rHw$($?(BPC98$B%7%j!<%:(B
$B$G$O(BIDE$B5!4o@\B3MQ$N%3%M%/%?$O#2$D$"$j$^$9!#$3$l$O(BPC-AT$B8_495!$HF1MM$G$9!#(B
$B$7$+$7$J$,$i;HMQ$7$F$$$k(BIO$B%]!<%H(B,$B3d$j9~$_(B,DMA$B%A%c%M%k$OA4$F#1$D!#$H$$(B
$B$&;EAH$_$r<h$C$F$$$^$9!#8m2r$r62$l$:$KBg$^$+$J?^$K$9$l$P0J2<$N$h$&$J46(B
$B$8$G$9!#(B

                   o---$B#H#D#D(B($B%^%9%?(B)---$B#H#D#D(B($B%9%l!<%V(B)  $B#1BfL\#H#D#DB&(B
                 $B!?(B 
$B!!FbIt%P%9(B -----o    $B"+(B   $BEE;RE*$J%9%$%C%A$N$h$&$J;EAH$,$"$k!#(B

                   o---$B#H#D#D(B($B%^%9%?(B)---$B#H#D#D(B($B%9%l!<%V(B)  $B%U%!%$%k%Y%$B&(B

$B"((B $B>/$7A0$N(BPC98$B$G$O%9%l!<%VB&$r(BBIOS$B$GG'<1$G$-$^$;$s$,!";HMQ$9$k;v$O2DG=(B
   $B$G$9!#$^$?(B98Note$B$G$O%U%!%$%k%Y%$B&$N(BHDD$B$r@\B3$9$k$3$H$O$G$-$^$;$s$,!"(B
   $B$3$N%9%$%C%A$OB8:_$9$k$h$&$G$9!#(B

$B"((B $B%U%!%$%k%Y%$$r;}$?$J$$5!<o$G$O!"$3$N?^$N%U%!%$%k%Y%$B&ItJ,$,B8:_$7$J$$(B
   $BMM$J7A$K$J$j$^$9$,!"$=$N:]%U%!%$%k%Y%$B&$X%9%$%C%A$N@Z$jBX$($r9T$*$&$H(B
   $B$7$?:]$K!"<!$N#2$D$N%1!<%9$,$"$k$h$&$G$9!#(B
       $B%G%#%9%/$,8+$($J$/$J$k5!<o(B
       $B#1BfL\$N%G%#%9%/$,$=$N$^$^8+$($k5!<o(B(As2/Ap2$B0JA0$N8E$$5!<o$,3:Ev(B)
   $B8+$($J$/$J$k>l9g$OLdBj$J$$$N$G$9$,!"#1Bf$N%G%#%9%/$,#2=E$K07$o$l$k(B
   $B$h$&$J;vBV$OLdBj$K$J$j$^$9!#(B

$B!!$3$l$,(BAT$B8_495!$G$O<!$N$h$&$J46$8$K$J$j$^$9!#(Bprimary/secondary$B$=$l$>(B
$B$lMQ$KFHN)$7$F(BIO$B%]!<%HEy$N;q8;$,MQ0U$5$l$^$9!#(B

       +------------$B#H#D#D(B($B%^%9%?(B)---$B#H#D#D(B($B%9%l!<%V(B)  primary$B#H#D#DB&(B
       |        
$B!!FbIt%P%9(B     $B=j0b#E!]#I#D#E$H8F$P$l$kJ*$G$J$$$H$3$A$i$N7OE}$O$J$$!#(B
       |        $B"-(B
       +------------$B#H#D#D(B($B%^%9%?(B)---$B#H#D#D(B($B%9%l!<%V(B)  secondary$B#H#D#DB&(B


$B!Z(BIBM/PC$B![(B
$B!{(B540MB$B$N%G%#%9%/$r$D$J$$$@$N$K!"(B12MB$B$@$C$F8@$o$l$?$s$G$9$1$I!)(B

$B!!Nc$($P!"!V(BE-IDE$BHsBP1~!W$J%^%7%s$G!"(B1048 cylinders $B$J%G%#%9%/$r!":GBg(B 
1024 cylinders $B$J(BBIOS$B$G;H$*$&$H$7$^$7$?!#>e8B$rD6$($F$$$^$9!#$G!"(B1024
$B$G3d$C$?M>$j$O!"(B24 cylinders$B$G$9!#$3$NMFNL$O!"(B

        24 $B!_(B 16 $B!_(B 63 $B!_(B 512 = 12,386,304 bytes

$B$J$N$G!"Ls(B12MB$B$G$9$M!#$3$N?t;z$,=P$F$-$?$N$G$9!#(B


$B!Z(BIBM/PC$B![(B
$B!{$(!+!A!"(B540MB$B$N$&$A(B12MB$B$7$+;H$($J$$$N$G$7$g$&$+!)(B   (g.g)

$B!!!V(BE-IDE$BBP1~!W$J%^%7%s$G$O!"(BBIOS$B$G!V(BE-IDE$BBP1~!W$d!V(BLBA$B!W$K@_Dj$9$l$P(B
$BNI$$$G$7$g$&!#$b$7!"HsBP1~$J%^%7%s$G!"(BBIOS$B@_Dj$G!"(B1024 cylinders $B$rD6(B
$B$($k?t;z$K$J$C$F$$$k$J$i!"<jF0$G!"(B1024 cylinders $B$K$7$F$7$^$$$^$7$g$&!#(B
$B>/$J$/$H$b!"(B528MB$B$O;H$($^$9!#(B


$B!Z(BIBM/PC$B![(B
$B!{(B800MB$B$N%G%#%9%/$r(B300MB$B$K$5$l$?26$O!"$I!A$9$j$cNI$$$s$@!)(B  (-.-#

$B!!$H$j$"$($:!"(BBIOS $B@_Dj$G(B 1024 cylinders = 504MB $B$K$7$F$*$$$F2<$5$$!#(B
FreeBSD$B$G$O!"%G%#%9%/A4BN$r;H$($^$9$+$i!D(B ($B>\:Y$O!"8e=R(B)


$B!Z(B98$B![(B
$B!{BgMFNL$N%G%#%9%/$r$D$J$$$@$i!"%7%j%s%@?t$,Ii$NCM$K$J$C$?$s$G$9$1$I!)(B

$B!!(BFreeBSD(98) 2.1.5$B$^$G$N%P%0$G$9!#(BFreeBSD 2.1.x$B$G$O%7%j%s%@?t$r(Bsiged
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$B$F2<$5$$!#(B


$B!Z(B98$B![(B
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$B!!(Bprimary/slave$B$X$N(BHDD$B$NA}@_$K4X$7$F$O!"8x<0$K%5%]!<%H$7$F$$$k5!<o$H%5(B
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$B$H$$$&@)Ls$,$"$j$^$9!#(B

$B!!(BFreeBSD(98)$B$r%$%s%9%H!<%k$G$-$k$+$O!"%P!<%8%g%s$K$b$h$j$^$9!#(B
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$B!Z(BIBM/PC$B![(B
$B!{(BE-IDE$BHsBP1~$J%^%7%s$G!"(B1GB$B$N%G%#%9%/$r;H$($k$s$G$9$+!)(B

$B!!A4$F$N%^%7%s$G;H$($k$+$I$&$+$O$o$+$j$^$;$s$,!";H$($k$3$H$OB?$$$G$9!#(B

$B!!$?$@$7!"(BIBM/PC$B8_495!$N(BMS-DOS$B$G$O!"L5M}LpM}(B500MB$BD6$K$9$k%=%U%H$rF~$l(B
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$BL5M}$G$9!#%=%U%H$GBP1~$9$k$K$O!"(BMicrohouse EZ-Drive$B$d(BOn Track Disk
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$B!!(BFreeBSD$B$G$O!"%G%#%9%/A4BN$r;H$($^$9!#%+!<%M%k$rFI$_=P$9;~$7$+!"(BBIOS
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$B%"%/%;%9$9$k$N$G!"(B1024 cylinders $B$,$I$&$7$?$H$$$&LdBj$O$"$j$^$;$s!#(B


$B!Z(B98$B![(B
$B!{(BE-IDE$BHsBP1~$J%^%7%s$G!"(B1GB$B$N%G%#%9%/$r;H$($k$s$G$9$+!)(B

$B!!;H$($^$9!#(BIBM/PC$B$HF1MM$K!"%+!<%M%k$rFI$_=P$9;~$K$7$+(BBIOS$B$r;HMQ$7$^$;(B
$B$s$+$i!"(BBIOS$B$,07$($kHO0O$K(B/$B%Q!<%F%#%7%g%s$rG<$a$F$*$1$PBg>fIW$G$9!#$^(B
$B$?!"$A$g$C$HA0$^$G$N(B98$B$G$O!"%^%9%?(B-$B%9%l!<%V@\B3$O;H$&;v$,=PMh$J$$$H$5(B
$B$l$F$$$k$N$G$9$,!"$3$l$i$N5!<o$G%9%l!<%V$N%G%#%9%/$r;HMQ$9$k;v$b$G$-$^(B
$B$9!#C"$7!"%9%l!<%V$+$i$N(Bboot$B$O$G$-$^$;$s!#(B


$B!Z(BIBM/PC$B![(B
$B!{$I!A$9$l$P!"Hs(BE-IDE$B%^%7%s$G(B504MB$BD6$N%G%#%9%/$r;H$($k$N!)(B

$B!!$^$:!"(BBIOS$B$OqY$7$F!"(B1024 cylinders = 504MB$B$H;W$o$;$F$*$-$^$7$g$&!#$=(B
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$BFb$K<}$a$^$9!#$3$N(B2$BE@$,%]%$%s%H$G$9!#%G%#%9%/A4BN$r(BFreeBSD$B$G;H$&;~$O!"(B
$B$3$l0J>e2?$b9M$($:$K!"%$%s%9%H!<%k$G$-$^$9!#(B/$B$r%G%#%9%/$N@hF,$K<}$a$k(B
$B$HNI$$$G$7$g$&!#(B

$B!!(BDOS$B$d(BWindows$B$H6&B8$5$;$k;~$O!"(BDOS$B$d(BWindows$B$H!"(BFreeBSD$B$N(B / $B%Q!<%F%#%7%g(B
$B%s$r$r(B1024 cylinders$BL$K~$NNN0h$K2!$79~$s$G$d$j$^$9!#Nc$($P!"(BDOS$B$d(B
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$B!!$5$F!"(BFreeBSD$B$K%$%s%9%H!<%k$G$9$,!"FCJL$J:Y9)$OITMW$G$9!#(B/ $B%Q!<%F%#(B
$B%7%g%s$r(B1024 cylinders$B0JFb$K<}$a$k$?$a$K!"(B/ $B%Q!<%F%#%7%g%s$N%5%$%:$KCm(B
$B0U$7$5$($9$l$P(BOK$B$G$9!#%$%s%9%H!<%i$+$i$O!"%G%#%9%/A4BN$,8+$($F$$$k$O$:(B
$B$G$9!#(B/ $B%Q!<%F%#%7%g%s0J30$O9%$-$J$h$&$K;H$($^$9!#(B


$B!Z(BIBM/PC$B![(B
$B!{(BE-IDE$BBP1~$J%^%7%s$G!"(BDOS/Windows$B$H(BFreeBSD$B$r6&B8$5$;$k$K$O!)(B

$B!!$$$m$$$m!"J}K!$,$"$j$^$9!#(BDOS/Windws$B$K$O(B500MB$BL$K~$7$+3d$jEv$F$J$$$N(B
$B$J$i!"(BBIOS$B@_Dj$G(BE-IDE, LBA, Large-Drive$B$NN`$rA4$F(BOFF$B$K$7$F!"Hs(BE-IDE$B07(B
$B$$$K$7$F$7$^$&J}K!$b$"$j$^$9!#(B

$B!!(BDOS/Windows$BEy$G!"(B504MB$B0J>e$r;H$&>l9g$K$O!"(BLBA$B$KMj$k$3$H$K$J$j$^$9!#(B
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FreeBSD$B$G$b;XDj$9$l$PF0$/$h$&$G$9!#(B


$B!Z(BIBM/PC$B![(B
$B!{(BGeometory$BJQ49$r;H$C$?>l9g!"(BFreeBSD$B$N(B / $B%Q!<%F%#%7%g%s$rCV$1$k0LCV$N(B
$B!!@)8B$O!)(B

$B!!$"$j$^$;$s!#(B


$B!Z(B98$B![(B
$B!{(BFreeBSD(98)$B$H(BWindows95$B$r6&B8$5$;$k$K$O!)(B

$B!!(BMS-DOS$B$N5/F0%a%K%e!<$,%$%s%9%H!<%k$7$F$"$l$P!"2?$b9M$($:$K(B
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$B2<$5$$!#$?$@$7!"!VA4It$NNN0h$r(BFreeBSD$B$G;HMQ!W$rA*$s$G$O$$$1$^$;$s!#(B

$B!!(BMS-DOS$B$N5/F0%a%K%e!<$r%$%s%9%H!<%k$7$F$$$J$$>l9g$O!"LLE]$G$b%P%C%/%"%C(B
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$B!!$^$?!"(BWindows95$B$N(Bfdisk$B%3%^%s%I$O4IM}>pJs$r>!<j$K=q$-49$($F$7$^$&$?$a(B
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$B%9%H!<%k$7$?$i@dBP$K(BWindows95$B$N(Bfdisk$B%3%^%s%I$r<B9T$7$J$$$G2<$5$$!#(B


$B!Z(BIBM/PC$B![(B
$B!{?7$7$$(BHDD$B$r9XF~$7$F$-$F(BFreeBSD$B$r%$%s%9%H!<%k$9$k:]$K$O!"(BDOS$B$G%U%)!<(B
$B!!%^%C%H$9$kI,MW$,$"$k$N$G$7$g$&$+!)(B

$B!!(BMSDOS$B$G%U%)!<%^%C%H$9$kI,MW$O$"$j$^$;$s$G$9!#Gc$C$?$i$=$N$^$^$D$J$2(B
$B$F(Bok.


$B!Z(B98$B![(B
$B!{?7$7$$(BHDD$B$r9XF~$7$F$-$F(BFreeBSD$B$r%$%s%9%H!<%k$9$k:]$K$O!"(BDOS$B$G%U%)!<(B
$B!!%^%C%H$9$kI,MW$,$"$k$N$G$7$g$&$+!)(B

$B!!A4It$NNN0h$r(BFreeBSD$B$G;HMQ$7!"B>$N%G%#%9%/$+$i$N%V!<%H$r9M$($J$$$N$G(B
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$B%^%C%H$,I,MW$G$9!#(B

$B!!(B98$B$G$O!$%G%#%9%/$N@hF,%7%j%s%@$K(BIPL$B$HNN0h>pJs$H5/F0%a%K%e!<(B($B%V!<%H%^(B
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$B$9$k;~$O!$$3$N@hF,%7%j%s%@$+$i;HMQ$7!$>e5-$N(B`IPL'$B$N0LCV$K(Bboot1$B$,F~$j$=(B
$B$N$"$H$K(Bboot2$B$H$$$&>uBV$K$J$j$^$9!%(B

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$B$^$9!%(B

$B!!%G%#%9%/$N@hF,$+$i(BFreeBSD(98)$B$K$7$?>l9g$O!$5/F0%a%K%e!<$KG'<1$5$l$J(B
$B$$$N$G!$B>$N%O!<%I%G%#%9%/$+$i5/F0$G$-$J$$$7!$B>$N%O!<%I%G%#%9%/$r5/F0(B
$B%I%i%$%V$K$9$k$3$H$,$G$-$J$$$H$$$&$o$1$G$9!%(B


$B!Z(BIBM/PC$B![(B
$B!{F0:n<B@S(B(E-IDE$BHsBP1~(BIBM/PC$B8_495!(B)

$B!&(BBIOS$B$K$O(B 1024 $B%7%j%s%@$H;W$o$;$k!#(BDOS $B$K$O(B 1024 $B%7%j%s%@L$K~$r3d$jEv(B
$B!!$F!"(BFreeBSD $B$K;D$j$r3d$jEv$F$k!#(BFreeBSD $B$N(B / $B$O!"(B1024 $B%7%j%s%@0JFb$K(B
$B!!<}$a$k!#$3$l$G!"(B700MB HDD $BA4BN$r;H$($F$^$9!#(B


$B!Z(BIBM/PC$B![(B
$B!{F0:n<B@S(B(E-IDE/LBA$BBP1~(BIBM/PC$B8_495!(B)

$B!&;d$O(B 2.1.5-RELEASE $B$r(B 700MB DOS$B!"(B500MB FreeBSD $B$G(B EIDE $B%G%#%9%/$r;H$C(B
$B!!$H$j$^$9!#(B/ $B$OA4NN0h(B 1024 $B%7%j%s%@$N30$K$"$j$^$9!#2?$K$bFC<l$J$3$H$O(B
$B!!$7$F$^$;$s!#(B

$B!&(BWDC AC21200H$B$H$$$&%G%#%9%/$O!"(B2484 cyls, 16 heads, 63 S/T$B$H$$$&(B
$B!!(Bgeometory$B$G$9!#$3$l$r(BLBA$B%b!<%I$G;H$&$H!"(B621 cyls, 64 heads, 63 S/T$B$K(B
$B!!JQ49$5$l$^$7$?(B(BIOS$B$K0MB8$9$k$H$O;W$$$^$9$,(B)$B!#(BFreeBSD2.1.5R$B$N(B
$B!!(Bboot.flp$B$O!"(B

        wdc0 at 0x1f0-0x1f7 irq 14 on isa
        wdc0: unit 0 (wd0): <WDC AC21200H>
        wd0: 1222MB (2503872 sectors), 2484 cyls, 16 heads, 63 S/T, 512 B/S

$B!!$HG'<1$7$^$9$,!"%Q!<%F%#%7%g%s%(%G%#%?$O!"(B621 cyls, 64 heads, 63 S/T
$B!!$HI=<($7$^$7$?!#C1=c$K$3$N$^$^%$%s%9%H!<%k$G$-$^$7$?!#(BDOS/Windows$B$K(B
$B!!(B550MB$B!"(BFreeBSD$B$K;D$j$r3d$jEv$F$F!"$I$A$i$b%V!<%H$G$-$F$$$^$9!#(B


$B!Z(B98$B![(B
$B!{F0:n<B@S(B(PC-98XX)

$B!&(BNS/T$B$G!"(BBIOS$B$G$O(B80M$B$^$G$7$+G'<1$G$-$J$$$O$:$G$9$,!"(BFreeBSD(98)2.0.5,
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$B!&(BPC-9821Bs$B$H$$$&5!<o$G$9$,!"$$$o$f$k(BE-IDE$B$J(BHDD$B$G$"$k(BWDAC31200$B$r4^$`(B
$B!!#4Bf$N(BIDE-HDD$B$r@\B3$7$F;HMQ$7$F$$$^$9!#(B
$B!!K\Mh$3$N5!<o$G$O!"(BBIOS$B$G$O(Bover500MB$B%/%i%9$N;HMQ$d%9%l!<%V$X$N@\B3$O(B
$B!!$G$-$J$$;v$K$J$C$F$$$^$9!#(B

$B!&(BPC9821Cx2$B$G(Bslave$B$K(BMAXTOR MX-72700AP$B$r@\B3$7$F$$$^$9!#%$%s%9%H!<%k$9(B
$B!!$k;~$O(Bmaster$B$H(Bslave$B$r8r49$7$^$7$?!#(Bslave$B$+$i$O%V!<%H$G$-$J$$$N$G!"(B
$B!!(Bmaster$B$K$b(B/$B%Q!<%F%#!<%7%g%s$r<h$j!"(Bslave$B$K(B/var$B$d(B/usr$B$r<h$k$h$&$K$7$F(B
$B!!1?MQ$7$F$$$^$9!#(B
========================================================================
$B!{<h$j$^$H$a(B
$BJ?Ln(B $B989((B <hirano@DSP.CL.NEC.co.jp>

$B!{>pJs$rDs6!$7$FD:$$$?J}!9(B($B7I>NN,!#(BE-mail$B$N(BABC$B=g(B)
$B?@ED(B $BIR9-(B <candy@fct.kgc.co.jp>
HOSOKAWA Tatsumi <hosokawa@mt.cs.keio.ac.jp>
KATO Takenori <kato@eclogite.eps.nagoya-u.ac.jp>
$B?@J]F;IW(B <karl@marcer.nagaokaut.ac.jp>
$BCfC+(B $B0l<y(B <knakaya@info-sys.tokyo.nkk.co.jp>
$B>.;3(B $BE/;V(B <koyama@artstech.co.jp>
TANAKA Keishiro <ksr@lp.nm.fujitsu.co.jp>
$B8^H?ED(B $B=)I'(B <nca03530@niftyserve.or.jp>
$BBg@P(B $B7.(B <ohishi@hf.rim.or.jp>
Tetsuya Ryuchi <ryuchi@pa2.so-net.or.jp>
$BNkLZ(B $B9/M:(B <suzuky@uxd.fc.nec.co.jp>
Hashimoto Youichi <youchan1@kaitoh.yaskawa.co.jp>
