- 61 -
BIOS
- 61 -
The Bootblock recovery code gets control when the BIOS determines that
a BIOS recovery needs to occur because the user has forced the update
or the BIOS checksum is corrupt. The following table describes the type of
checkpoints that may occur during the Bootblock recovery portion of the
BIOS
(Note)
:
Checkpoint
Description
E0
,QLWLDOL]HWKHÀRSS\FRQWUROOHULQWKHVXSHU,26RPHLQWHUUXSW
vectors are initialized. DMA controller is initialized. 8259
interrupt controller is initialized. L2 cache is enabled.
E9
6HWXSÀRSS\FRQWUROOHUDQGGDWD$WWHPSWWRUHGIURPÀRSS\
EA
Enable ATAPI hardware. Attempt to read from ARMD and
ATAPI CDROM.
EB
Disable ATAPI hardware. Jump back to checkpoint E9.
EF
Read error occurred on media. Jump back to checkpoint EB.
F0
6HDUFKIRUSUHGH¿QHGUHFRYHU\¿OHQDPHLQURRWGLUHFWRU\
F1
5HFRYHU\¿OHQRWIRXQG
F2
6WDUWUHDGLQJ)$7WDEOHDQGDQDO\]H)$7WR¿QGWKHFOXVWHUV
RFFXSLHGE\WKHUHFRYHU\¿OH
F3
6WDUWUHDGLQJWKHUHFRYHU\¿OHFOXVWHUE\FOXVWHU
F5
Disable L1 cache.
FA
&KHFNWKHYDOLGLW\RIWKHUHFRYHU\¿OHFRQ¿JXUDWLRQWRWKH
FXUUHQWFRQ¿JXUDWLRQRIWKHÀDVKSDUW
FB
0DNHÀDVKZULWHHQDEOHGWKURXJKFKLSVHWDQG2(0VSHFL¿F
PHWKRG'HWHFWSURSHUÀDVKSDUW9HULI\WKDWWKHIRXQGÀDVK
SDUWVL]HHTXDOVWKHUHFRYHU\¿OHVL]H
F4
7KHUHFRYHU\¿OHVL]HGRHVQRWHTXDOWKHIRXQGÀDVKSDUWVL]H
3.9.2 Bootblock Recovery Code Checkpoints
Содержание IP-M45A1
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Страница 6: ... iv This page is intentionally left blank Index ...
Страница 7: ... 1 Introduction 1 1 Chapter 1 Introduction Chapter 1 Introduction ...
Страница 16: ... 10 Introduction 10 This page is intentionally left blank ...
Страница 17: ... 11 Installation 11 2 Chapter 2 Installation Chapter 2 Installation ...
Страница 37: ... 31 BIOS 31 3 Chapter 3 BIOS Chapter 3 BIOS ...
Страница 76: ... 70 Appendix 70 4 Chapter 4 Appendix Chapter 4 Appendix ...
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