BIOS
From Just Solve the File Format Problem
(Difference between revisions)
Dan Tobias (Talk | contribs) |
|||
Line 2: | Line 2: | ||
|formattype=electronic | |formattype=electronic | ||
|subcat=Firmware | |subcat=Firmware | ||
+ | |extensions={{ext|bin}}, {{ext|rom}} | ||
}} | }} | ||
− | '''BIOS''' (Basic Input Output System), is a [[Read Only Memory|ROM]] chip containing code (firmware) to control peripherals attached to a [[PC]]. | + | '''BIOS''' (Basic Input Output System), is a [[Read Only Memory|ROM]] chip containing code (firmware) to control peripherals attached to a [[wikipedia:PC]]. |
+ | |||
+ | The x86 BIOS entry point is located at physical address <code>0xfffffff0</code> (usually corresponding to 16 bytes from the end of the BIOS image) and is executed in 16-bit real mode; it usually contains a far jump instruction (either far or near). There are no other guarantees about BIOS image layout, although many vendors have developed in-house formats. | ||
+ | |||
+ | [[UEFI]] firmware images usually contain an embedded [[Firmware File System]]. | ||
+ | |||
+ | == Links == | ||
+ | * [http://www.coreboot.org/Bios_extract bios_extract] | ||
+ | * [http://bioshacking.blogspot.com/2012/02/bios-disassembly-ninjutsu-uncovered-1st.html BIOS Disassembly Ninjutsu Uncovered] | ||
[[category:Low level instructions]] [[Category:File format details]] | [[category:Low level instructions]] [[Category:File format details]] |
Revision as of 22:25, 7 March 2015
BIOS (Basic Input Output System), is a ROM chip containing code (firmware) to control peripherals attached to a wikipedia:PC.
The x86 BIOS entry point is located at physical address 0xfffffff0
(usually corresponding to 16 bytes from the end of the BIOS image) and is executed in 16-bit real mode; it usually contains a far jump instruction (either far or near). There are no other guarantees about BIOS image layout, although many vendors have developed in-house formats.
UEFI firmware images usually contain an embedded Firmware File System.