The layout of the Multiboot header must be as follows:
Offset | Type | Field Name | Note
|
0 | u32 | magic | required
|
4 | u32 | flags | required
|
8 | u32 | checksum | required
|
12 | u32 | header_addr | if flags[16] is set
|
16 | u32 | load_addr | if flags[16] is set
|
20 | u32 | load_end_addr | if flags[16] is set
|
24 | u32 | bss_end_addr | if flags[16] is set
|
28 | u32 | entry_addr | if flags[16] is set
|
32 | u32 | mode_type | if flags[2] is set
|
36 | u32 | width | if flags[2] is set
|
40 | u32 | height | if flags[2] is set
|
44 | u32 | depth | if flags[2] is set
|
The fields magic
, flags
and checksum
are defined in
Header magic fields, the fields header_addr
,
load_addr
, load_end_addr
, bss_end_addr
and
entry_addr
are defined in Header address fields, and the
fields mode_type
, width
, height
and depth
are
defind in Header graphics fields.