̾??
boot0cfg
—
?֡??ȥޥ͡??????Υ??ȡ??????????桼?ƥ????ƥ?
boot0cfg
[-Bv
]
[-b
boot0]
[-d
drive]
[-f
file]
[-m
mask]
[-o
options]
[-s
slice]
[-t
ticks]
disk
FreeBSD ?? ‘boot0’
?֡??ȥޥ͡??????ϡ? i386 ?ޥ??? (PC)
???ɤΥǥ??????ΤɤΥ??饤?????鵯ư???뤫????
?????Ԥ??????Ǥ????褦?ˤ??ޤ???
?????ǡ? “???饤??”
?ȸ??ڤ??Ƥ??????Τϡ?
BSD ?ʳ??? PC
??Ϣʸ???ˤ????Ƥϰ???Ū??
“?ѡ??ƥ???????”
?ȸƤФ??뤳?Ȥ????դ??Ƥ?????????
ŵ??Ū?ˤϡ????ࡼ?Х֥??ǥ??????ʳ??Τߡ????饤?????????ޤ???
???ץ??????Ȥ??ơ?
boot0cfg
?桼?ƥ????ƥ???
‘boot0’
?֡??ȥޥ͡??????????ꤷ??
disk ?إ??ȡ??뤷?ޤ?;
?????ơ??͡?????????ǽ?ʥѥ?????????????????ޤ???
PC
?Ǥϡ??֡??ȥޥ͡???????ŵ??Ū?˥ǥ??????Υ?????
0 ?ˤ??ꡢ ?ޥ????֡??ȥ쥳???? (Master
Boot Record; MBR) ?Ȥ????Τ????Ƥ??ޤ??? MBR
?ϡ??????? (PC BIOS ???????????Ϥ????ޤ?) ?? ?ǡ???
(???????줿???饤???˴ؤ????Ȥ߹??ߤ?ɽ)
?Ρ?ξ?????ޤߤޤ???
???ץ??????ϼ????̤??Ǥ?:
-B
- ‘boot0’
?֡??ȥޥ͡??????ȡ??뤷?ޤ???
???Υ??ץ??????ϡ?MBR
?????ɤ????ޤ?????
?Ȥ߹??ߺѤΥ??饤??ɽ?ˤϱƶ????ޤ?????
-b
boot0
- ?ɤ? ‘boot0’
??????????Ѥ??뤫?????ꤷ?ޤ???
?ǥե????Ȥϥӥǥ??????ɤ????Ϥ????Ѥ???
/boot/boot0
?Ǥ????????뤤?ϡ?COM1
?ݡ??Ȥ˽??Ϥ???
/boot/boot0sio
???Ȥ????Ȥ??Ǥ??ޤ?
(???ǥॷ???ʥ??? DSR ?? CTS
??ư??ʤ??????ϡ? COM1
?ݡ??Ȥˤϲ??????Ϥ????ʤ????Ȥ????դ??Ʋ?????)??
-d
drive
- ???ꤷ?? disk
???ޤ??ɥ饤?֤Ȥ??뤿???? PC
BIOS
?????Ѥ??롢?ɥ饤???ֹ??????ꤷ?ޤ???
ŵ??Ū?ˤϡ??ǽ??Υϡ??ɥɥ饤?֤?
0x80 ?Ǥ??ꡢ 2
???ܤΥϡ??ɥɥ饤?֤? 0x81
?ʤɤȤʤ??ޤ?; 0 ???? 0xff
?ޤǤδ֤?Ǥ?դ????????????դ???ǽ?Ǥ???
-f
file
- ???????ä? MBR
?ΥХå????åץ??ԡ???
file
?˽????٤??Ǥ??뤳?Ȥ????ꤷ?ޤ???
???Υե??????ϡ?¸?ߤ??ʤ??????ˤϺ??????졢
¸?ߤ????????ˤ??ִ??????ޤ???
-m
mask
- ???饤????ͭ??/̵???????ꤷ?ޤ???
mask ?? 0 (?????饤????̵??) ???? 0xf (4
???????Υ??饤????ͭ??)
?δ֤??????Ǥ???
-o
options
- ?????ޤǶ??ڤ??줿ʸ?????Ǥ??ꡢ???Υ??ץ?????????????ǽ?Ǥ?
(ɬ?פ˱????? “no”
???????դ??뤳?Ȥ???ǽ?Ǥ?):
- packet
- ?ǥ???????Ϣ BIOS
?????ӥ??˥????????????Ȥ??ˡ? ????Ū??
(CHS) ???ե??????ǤϤʤ???
?ǥ??????ѥ??å? (BIOS INT 0x13 ??ĥ)
???ե???????ɬ?פ˱????ƻ??Ѥ??ޤ???
?????ˤ??ꡢ1023
????????Ķ?????֡??Ȳ?ǽ?Ȥʤ??ޤ?????
??????BIOS ???ݡ??Ȥ?ɬ?פǤ???
?ǥե????Ȥ? ‘nopacket’
?Ǥ???
- setdrv
- ?ǥ????????ޤ??ɥ饤?֤λ??Ȥˡ?-d
???ץ??????ˤ???
??????ǽ?ʥɥ饤???ֹ??????Ѥ??뤳?Ȥ????????ޤ???
?ǥե????Ȥ? ‘nosetdrv’
?Ǥ???
- update
- ?֡??ȥޥ͡????㤬 MBR
?????뤳?Ȥ????Ĥ??ޤ???(???饤????
‘??ư’
???֤Ȥ??뤿???䡢???饤????????????????¸???뤿???ˡ?MBR
???????????ޤ???)
???줬?ǥե????ȤǤ?;
‘noupdate’ ???ץ??????????ꤹ???ȡ?MBR
???ɤ߹??????Ѥǰ??????ޤ???
-s
slice
- ?ǥե????ȤΥ֡?????????
slice ?????ꤷ?ޤ??? 1 ???? 4
?ޤǤ??ͤϡ????饤?????ޤ???
?? 5 ?ϡ?2
???ܤΥǥ??????????Υ֡??Ȥ??ޤ???
-t
ticks
- ?????ॢ?????ͤ? ticks
?????ꤷ?ޤ? (1 ?ä??????? tick ?????? 18.2
?ĤǤ?)??
-v
- ??Ĺ:
???????줿???饤???˴ؤ????????ʤɤ?ɽ?????ޤ???
- /boot/boot0
- ?ǥե????Ȥ? ‘boot0’ ?????
- /boot/boot0sio
- ???ꥢ?륳?????ѤΥ????
(COM1,9600,8,N,1,MODEM)
?????֡??Ȼ??˥??饤?? 2
?????֡??Ȥ??ޤ?:
boot0cfg -s 2 ad0
???˥塼?ǡ????饤?? 1 ?? 2
??????ͭ???ˤ??ޤ?:
boot0cfg -m 0x3 ad0
The boot0cfg
utility exits 0 on
success, and >0 if an error occurs.
Robert Nordier
⟨rnordier@FreeBSD.org⟩
‘packet’ ???ץ??????????Ѥ????ȡ?
‘boot0’ ?????Ԥ??뤳?Ȥ??????ޤ???
?????? BIOS
???ݡ??Ȥ??????˰?¸???Ƥ??ޤ???
???ä? -d ???ڥ????ɤȤȤ???
‘setdrv’ ???ץ??????????Ѥ????ȡ?MBR
?????ä??ǥ??????ؽ??ळ?Ȥˤʤ??ޤ???
???դ??Ƥ??????? !