The legacy U-Boot image format (uImage), as created by mkimage: a 64-byte
header followed by the image data (e.g. a Linux kernel, a ramdisk or a
script). The header describes the data (OS, CPU architecture, image type,
compression, load and entry point addresses, name) and protects both the
header and the data with CRC-32 checksums.
U-Boot's newer FIT (Flattened Image Tree) format is not covered by this spec.
This page hosts a formal specification of U-Boot Image wrapper using Kaitai Struct. This specification can be automatically translated into a variety of programming languages to get a parsing library.
All Ruby code generated by Kaitai Struct depends on the Kaitai Struct runtime library for Ruby. You must add this dependency to your project before you can parse or serialize any data.
The Ruby runtime library can be installed from RubyGems:
gem install kaitai-structParse a local file and get structure in memory:
data = Uimage.from_file("path/to/local/file.bin")
Or parse structure from a string of bytes:
bytes = "\x00\x01\x02..."
data = Uimage.new(Kaitai::Struct::Stream.new(bytes))
After that, one can get various attributes from the structure by invoking getter methods like:
data.header # => get header
# This is a generated file! Please edit source .ksy file and use kaitai-struct-compiler to rebuild
require 'kaitai/struct/struct'
unless Gem::Version.new(Kaitai::Struct::VERSION) >= Gem::Version.new('0.11')
raise "Incompatible Kaitai Struct Ruby API: 0.11 or later is required, but you have #{Kaitai::Struct::VERSION}"
end
##
# The legacy U-Boot image format (uImage), as created by `mkimage`: a 64-byte
# header followed by the image data (e.g. a Linux kernel, a ramdisk or a
# script). The header describes the data (OS, CPU architecture, image type,
# compression, load and entry point addresses, name) and protects both the
# header and the data with CRC-32 checksums.
#
# U-Boot's newer FIT (Flattened Image Tree) format is not covered by this spec.
# @see https://github.com/u-boot/u-boot/blob/ece349ade2973e220f524ce59e59711cc919263f/include/image.h Git tag "v2026.07"
class Uimage < Kaitai::Struct::Struct
MAGIC_TYPES = {
5 => :magic_types_allnet_all_sg8316m,
6 => :magic_types_allnet_all_sg8208m,
22 => :magic_types_allnet_all_sg8324m,
7353344 => :magic_types_datto_l8,
9453568 => :magic_types_allnet_all_wapc0450c,
50398464 => :magic_types_engenius_ews2910p_v3,
50402048 => :magic_types_engenius_ews1200_28tfp,
50402050 => :magic_types_engenius_ews7926efp,
50406401 => :magic_types_engenius_ews7952p,
50409728 => :magic_types_engenius_ews2908p,
51450112 => :magic_types_engenius_ews7928p_v2,
51450624 => :magic_types_engenius_ews1200_28tfp_v2,
58730768 => :magic_types_engenius_ews2910p,
58743058 => :magic_types_engenius_ews5912fp,
58751272 => :magic_types_engenius_ews7928p,
59187216 => :magic_types_engenius_ews1200d_10t,
59187240 => :magic_types_engenius_ews1200_28t,
59216527 => :magic_types_engenius_ews7928fp,
60235858 => :magic_types_engenius_ews1200_52t,
60265775 => :magic_types_engenius_ews7952fp,
304680960 => :magic_types_youku_yk_l1,
305418240 => :magic_types_realtek_sdk,
391006017 => :magic_types_netgear_gs750e,
391006018 => :magic_types_netgear_gs728tp_v2,
638656533 => :magic_types_bolt_bl100,
654645590 => :magic_types_uimage,
654645607 => :magic_types_netgear_wnce4004,
808857906 => :magic_types_netgear_wnr612_v2_early,
825241648 => :magic_types_netgear_wnr1000_v2_vc,
825241649 => :magic_types_netgear_wnr1000_v2,
825241650 => :magic_types_netgear_wnr1000_v2_vm,
825241652 => :magic_types_netgear_wnr1000_v4,
825307184 => :magic_types_netgear_wpn824n,
827343191 => :magic_types_zyxel_uag50,
842018865 => :magic_types_netgear_wnr2000,
842018867 => :magic_types_netgear_wnr2000_v3,
842018868 => :magic_types_netgear_wnr2000_v4,
842020401 => :magic_types_netgear_wnr612_v2,
842149936 => :magic_types_netgear_wnr2200,
859254832 => :magic_types_netgear_wndr3700,
859254833 => :magic_types_netgear_wndr3700_v2,
859254835 => :magic_types_netgear_wndr3700_v4,
909127728 => :magic_types_netgear_r6100,
909193778 => :magic_types_netgear_wnr612,
1129270594 => :magic_types_mitrastar_comb,
1129270595 => :magic_types_mitrastar_comc,
1313293109 => :magic_types_netgear_gs308t,
1313293600 => :magic_types_netgear_nge,
1313293856 => :magic_types_netgear_ngf,
1313294112 => :magic_types_netgear_ngg,
1313294368 => :magic_types_netgear_ngh,
1313294624 => :magic_types_netgear_ngi,
1313296416 => :magic_types_netgear_ngp,
1330334793 => :magic_types_openwrt_okli,
1752396147 => :magic_types_openwrt_dlink_covr,
1936805707 => :magic_types_openwrt_senao_okli,
2155872258 => :magic_types_engenius_ecs1112fp,
2155872259 => :magic_types_engenius_fitswitch,
2197885696 => :magic_types_engenius_ews1200_28tfp_old_fw,
2197885698 => :magic_types_engenius_ews7926efp_old_fw,
2197890049 => :magic_types_engenius_ews7952p_old_fw,
2206203904 => :magic_types_realtek_rtl838x,
2206203905 => :magic_types_iodata_bsh_g08m,
2206203906 => :magic_types_iodata_bsh_gp08,
2206203907 => :magic_types_iodata_bsh_g16m,
2206203908 => :magic_types_iodata_bsh_g24m,
2206203920 => :magic_types_iodata_bsh_g08mb,
2206203921 => :magic_types_iodata_bsh_gp08mb,
2206203922 => :magic_types_iodata_bsh_g16mb,
2206203923 => :magic_types_iodata_bsh_g24mb,
2206210573 => :magic_types_trendnet_tpe_3012ls,
2206210574 => :magic_types_trendnet_tpe_3018ls,
2206212360 => :magic_types_engenius_egs2108p_old_fw,
2206212368 => :magic_types_engenius_egs2110p_old_fw,
2206214416 => :magic_types_engenius_ews2910p_old_fw,
2206224656 => :magic_types_engenius_egs5110p_old_fw,
2206224914 => :magic_types_engenius_egs5212fp_old_fw,
2206226706 => :magic_types_engenius_ews5912fp_old_fw,
2206234920 => :magic_types_engenius_ews7928p_old_fw,
2206670864 => :magic_types_engenius_ews1200d_10t_old_fw,
2206670888 => :magic_types_engenius_ews1200_28t_old_fw,
2206671503 => :magic_types_engenius_egs7228fp_old_fw,
2206700175 => :magic_types_engenius_ews7928fp_old_fw,
2207252480 => :magic_types_realtek_rtl839x,
2207645696 => :magic_types_realtek_rtl8396,
2207719506 => :magic_types_engenius_ews1200_52t_old_fw,
2207720751 => :magic_types_engenius_egs7252fp_old_fw,
2207749423 => :magic_types_engenius_ews7952fp_old_fw,
2466250752 => :magic_types_realtek_rtl930x,
2466254864 => :magic_types_zyxel_xgs1010_12,
2466255376 => :magic_types_zyxel_xgs1210_12,
2466255440 => :magic_types_zyxel_xgs1250_12,
2466447360 => :magic_types_nicgiga_s100_0800s_m,
2467299328 => :magic_types_plasmacloud_psx28,
}
I__MAGIC_TYPES = MAGIC_TYPES.invert
UIMAGE_ARCH = {
0 => :uimage_arch_invalid,
1 => :uimage_arch_alpha,
2 => :uimage_arch_arm,
3 => :uimage_arch_i386,
4 => :uimage_arch_ia64,
5 => :uimage_arch_mips,
6 => :uimage_arch_mips64,
7 => :uimage_arch_ppc,
8 => :uimage_arch_s390,
9 => :uimage_arch_sh,
10 => :uimage_arch_sparc,
11 => :uimage_arch_sparc64,
12 => :uimage_arch_m68k,
13 => :uimage_arch_nios,
14 => :uimage_arch_microblaze,
15 => :uimage_arch_nios2,
16 => :uimage_arch_blackfin,
17 => :uimage_arch_avr32,
18 => :uimage_arch_st200,
19 => :uimage_arch_sandbox,
20 => :uimage_arch_nds32,
21 => :uimage_arch_openrisc,
22 => :uimage_arch_arm64,
23 => :uimage_arch_arc,
24 => :uimage_arch_x86_64,
25 => :uimage_arch_xtensa,
26 => :uimage_arch_riscv,
}
I__UIMAGE_ARCH = UIMAGE_ARCH.invert
UIMAGE_COMP = {
0 => :uimage_comp_none,
1 => :uimage_comp_gzip,
2 => :uimage_comp_bzip2,
3 => :uimage_comp_lzma,
4 => :uimage_comp_lzo,
5 => :uimage_comp_lz4,
6 => :uimage_comp_zstd,
9 => :uimage_comp_mz,
10 => :uimage_comp_xip,
}
I__UIMAGE_COMP = UIMAGE_COMP.invert
UIMAGE_OS = {
0 => :uimage_os_invalid,
1 => :uimage_os_openbsd,
2 => :uimage_os_netbsd,
3 => :uimage_os_freebsd,
4 => :uimage_os_bsd4_4,
5 => :uimage_os_linux,
6 => :uimage_os_svr4,
7 => :uimage_os_esix,
8 => :uimage_os_solaris,
9 => :uimage_os_irix,
10 => :uimage_os_sco,
11 => :uimage_os_dell,
12 => :uimage_os_ncr,
13 => :uimage_os_lynxos,
14 => :uimage_os_vxworks,
15 => :uimage_os_psos,
16 => :uimage_os_qnx,
17 => :uimage_os_u_boot,
18 => :uimage_os_rtems,
19 => :uimage_os_artos,
20 => :uimage_os_unity,
21 => :uimage_os_integrity,
22 => :uimage_os_ose,
23 => :uimage_os_plan9,
24 => :uimage_os_openrtos,
25 => :uimage_os_arm_trusted_firmware,
26 => :uimage_os_tee,
27 => :uimage_os_opensbi,
28 => :uimage_os_efi,
29 => :uimage_os_elf,
}
I__UIMAGE_OS = UIMAGE_OS.invert
UIMAGE_TYPE = {
0 => :uimage_type_invalid,
1 => :uimage_type_standalone,
2 => :uimage_type_kernel,
3 => :uimage_type_ramdisk,
4 => :uimage_type_multi,
5 => :uimage_type_firmware,
6 => :uimage_type_script,
7 => :uimage_type_filesystem,
8 => :uimage_type_flatdt,
9 => :uimage_type_kwbimage,
10 => :uimage_type_imximage,
11 => :uimage_type_ublimage,
12 => :uimage_type_omapimage,
13 => :uimage_type_aisimage,
14 => :uimage_type_kernel_noload,
15 => :uimage_type_pblimage,
16 => :uimage_type_mxsimage,
17 => :uimage_type_gpimage,
18 => :uimage_type_atmelimage,
19 => :uimage_type_socfpgaimage,
20 => :uimage_type_x86_setup,
21 => :uimage_type_lpc32xximage,
22 => :uimage_type_loadable,
23 => :uimage_type_rkimage,
24 => :uimage_type_rksd,
25 => :uimage_type_rkspi,
26 => :uimage_type_zynqimage,
27 => :uimage_type_zynqmpimage,
28 => :uimage_type_zynqmpbif,
29 => :uimage_type_fpga,
30 => :uimage_type_vybridimage,
31 => :uimage_type_tee,
32 => :uimage_type_firmware_ivt,
33 => :uimage_type_pmmc,
34 => :uimage_type_stm32image,
35 => :uimage_type_socfpgaimage_v1,
36 => :uimage_type_mtkimage,
37 => :uimage_type_imx8mimage,
38 => :uimage_type_imx8image,
39 => :uimage_type_copro,
40 => :uimage_type_sunxi_egon,
41 => :uimage_type_sunxi_toc0,
42 => :uimage_type_fdt_legacy,
43 => :uimage_type_renesas_spkg,
44 => :uimage_type_starfive_spl,
45 => :uimage_type_tfa_bl31,
46 => :uimage_type_stm32image_v2,
47 => :uimage_type_amlimage,
}
I__UIMAGE_TYPE = UIMAGE_TYPE.invert
def initialize(_io, _parent = nil, _root = nil)
super(_io, _parent, _root || self)
_read
end
def _read
@header = Uheader.new(@_io, self, @_root)
@data = @_io.read_bytes(header.len_image)
self
end
##
# ASUS firmware images [overlay the 32-byte image
# name](https://github.com/drag0njoe/RT-AC55U/blob/cf5874684ab6995ee07e91a52dfdd0562fcc2655/release/src/asustools/mkimage.src/include/image.h#L185-L188)
# with a [`TAIL`
# structure](https://github.com/drag0njoe/RT-AC55U/blob/cf5874684ab6995ee07e91a52dfdd0562fcc2655/release/src/asustools/mkimage.src/include/image.h#L151-L171)
# that contains version information and the product ID (model name).
#
# The first 16 bytes have the same structure in all three known variants of
# the `TAIL` structure. The meaning of the last 16 bytes differs across the
# variants - therefore, for simplicity, this Kaitai Struct implementation
# treats them as an opaque byte array named `extra_info`. For an overview of
# the variants, see the documentation for `extra_info`.
class AsusFirmwareInformation < Kaitai::Struct::Struct
def initialize(_io, _parent = nil, _root = nil)
super(_io, _parent, _root)
_read
end
def _read
@kernel_version = Version.new(@_io, self, @_root)
@fs_version = Version.new(@_io, self, @_root)
@product_id = (Kaitai::Struct::Stream::bytes_terminate(@_io.read_bytes(12), 0, false)).force_encoding("UTF-8")
@extra_info = @_io.read_bytes(16)
self
end
attr_reader :kernel_version
attr_reader :fs_version
##
# In the Ralink SDK variant (see `extra_info`), the product ID field is
# actually 23 bytes long, but no known product ID is longer than 12
# bytes.
attr_reader :product_id
##
# The structure of these bytes varies among the three known variants of
# the `TAIL` structure, and the header doesn't say which one is used:
#
# * Plain: 8 hardware versions (using the `version` type) - see
# <https://github.com/drag0njoe/RT-AC55U/blob/cf5874684ab6995ee07e91a52dfdd0562fcc2655/release/src/asustools/mkimage.src/include/image.h#L170>
#
# Sample file: `RT-AC51U_3.0.0.4_380_8591-ga8dd632.trx` from
# <https://dlcdnets.asus.com/pub/ASUS/wireless/RT-AC51U/FW_RT_AC51U_30043808591.zip>,
# released on 2020-09-22 and listed on
# <https://www.asus.com/supportonly/rt-ac51u/helpdesk_bios/>.
#
# Source code links:
#
# - [ASUS GPL source, RT-AC55UHP
# 3.0.0.4.382.51915](https://dlcdnets.asus.com/pub/ASUS/wireless/RT-AC55UHP/GPL_RT_AC55UHP_300438251915.zip)
# (`asuswrt/release/src/asustools/mkimage.src/` in
# `GPL_RT-AC55UHP_3.0.0.4.382.51915-g4086e57.tgz`)
# - [ASUS GPL source, RT-AC55U 3.0.0.4.382.50702 (unofficial
# mirror)](https://github.com/drag0njoe/RT-AC55U/tree/cf5874684ab6995ee07e91a52dfdd0562fcc2655/release/src/asustools/mkimage.src)
#
# * `TRX_NEW` (a macro defined when building `mkimage`): the
# build number and extended build number (`u2le` each), two key bytes
# and 5 hardware versions - see
# <https://github.com/drag0njoe/RT-AC55U/blob/cf5874684ab6995ee07e91a52dfdd0562fcc2655/release/src-qca/asustools/mkimage.src/include/image.h#L174-L180>
#
# `mkimage` [overwrites the first 3 hardware
# versions](https://github.com/drag0njoe/RT-AC55U/blob/cf5874684ab6995ee07e91a52dfdd0562fcc2655/release/src-qca/asustools/mkimage.src/mkimage.c#L546-L569)
# with values derived from the key bytes.
#
# Sample file: `RT-AC55UHP_3.0.0.4_382_52236-ga0f880d.trx` (build 382,
# extended build 52236) from
# <https://dlcdnets.asus.com/pub/ASUS/wireless/RT-AC55UHP/FW_RT_AC55UHP_300438252236.zip>,
# released on 2020-06-04 and listed on
# <https://www.asus.com/supportonly/rt-ac55uhp/helpdesk_bios/>.
#
# Source code links:
#
# - [ASUS GPL source, RT-AC55UHP
# 3.0.0.4.382.51915](https://dlcdnets.asus.com/pub/ASUS/wireless/RT-AC55UHP/GPL_RT_AC55UHP_300438251915.zip)
# (`asuswrt/release/src-qca/asustools/mkimage.src/` in
# `GPL_RT-AC55UHP_3.0.0.4.382.51915-g4086e57.tgz`)
# - [ASUS GPL source, RT-AC55U 3.0.0.4.382.50702 (unofficial
# mirror)](https://github.com/drag0njoe/RT-AC55U/tree/cf5874684ab6995ee07e91a52dfdd0562fcc2655/release/src-qca/asustools/mkimage.src)
#
# * Ralink SDK: the rest of a 23-byte product ID (see `product_id`),
# a version suffix letter and the kernel part size (called `ih_ksz`) -
# see <https://github.com/andy-padavan/rt-n56u/blob/32a93db4026cc2cff585d7008373432d888fc1aa/trunk/tools/mkimage/include/image.h#L164-L165>
#
# Sample file: `RP-N12_1.0.1.1f.trx` from
# <https://dlcdnets.asus.com/pub/ASUS/wireless/RP-N12/FW_RP-N12_1.0.1.1f.zip>,
# released on 2019-11-12 and listed on
# <https://www.asus.com/supportonly/rp-n12/helpdesk_bios/>.
#
# Source code links:
#
# - [ASUS GPL source, RP-N12
# 1.0.1.1f](https://dlcdnets.asus.com/pub/ASUS/wireless/RP-N12/GPL_RP_N12_1011f.zip)
# (`GPL_RP-N12_source.1011f/user/mkimage/include/image.h` in
# `GPL_RP-N12_source.1011f.tar.bz2`)
# - [rt-n56u custom firmware by Andy
# Padavan](https://github.com/andy-padavan/rt-n56u/blob/32a93db4026cc2cff585d7008373432d888fc1aa/trunk/tools/mkimage/include/image.h)
#
# In the plain and `TRX_NEW` variants, the last 4 bytes may instead
# contain the offset of the root file system, which is [written by
# `mkimage -r`](https://github.com/drag0njoe/RT-AC55U/blob/cf5874684ab6995ee07e91a52dfdd0562fcc2655/release/src/asustools/mkimage.src/mkimage.c#L527-L542)
# as the magic byte 0xA9
# ([`ROOTFS_OFFSET_MAGIC`](https://github.com/drag0njoe/RT-AC55U/blob/cf5874684ab6995ee07e91a52dfdd0562fcc2655/release/src/asustools/mkimage.src/include/image.h#L154-L159))
# followed by the offset as a 24-bit big-endian integer.
attr_reader :extra_info
end
class NameOrAsusInfo < Kaitai::Struct::Struct
def initialize(_io, _parent = nil, _root = nil)
super(_io, _parent, _root)
_read
end
def _read
if !(has_asus_info)
@name = (@_io.read_bytes_term(0, false, true, false)).force_encoding("UTF-8")
end
if has_asus_info
@asus_info = AsusFirmwareInformation.new(@_io, self, @_root)
end
self
end
def byte0
return @byte0 unless @byte0.nil?
_pos = @_io.pos
@_io.seek(0)
@byte0 = @_io.read_u1
@_io.seek(_pos)
@byte0
end
def byte4
return @byte4 unless @byte4.nil?
_pos = @_io.pos
@_io.seek(4)
@byte4 = @_io.read_u1
@_io.seek(_pos)
@byte4
end
##
# Whether this type stores ASUS firmware information (`asus_info`)
# rather than an image name (`name`).
#
# The header doesn't say which one it is, so we infer it using a
# heuristic based on the layout of the `asus_firmware_information` type.
# If ASUS firmware info is present, the first byte (the major kernel
# version number) is a small integer (i.e. not a printable character),
# and byte 4 (first byte of the product ID/model name) is a printable
# character. An empty name is not mistaken for ASUS information, because
# its byte 4 is a null byte.
#
# The highest known major kernel version number is 9 (e.g. in
# `DSL-N55U_9.0.0.4_380_3925-gad8f412_Annex_A.trx` from
# <https://dlcdnets.asus.com/pub/ASUS/wireless/DSL-N55U/FW_DSL_N55U_90043803925.zip>,
# released on 2016-08-04 and listed on
# <https://www.asus.com/supportonly/dsl-n55u/helpdesk_bios/>). ASUS
# seems to use such high major versions (9, sometimes 7) for beta
# releases, whereas regular releases use 3 (or 1 in older firmware).
#
# It can also be 0, in particular due to a bug in the MediaTek MT798X
# build of ASUS's `mkimage` (it reads the `-V` values from fixed `argv`
# positions, even though it parses the options using `getopt()` - see
# <https://github.com/blocktrron/tuf-ax4200-gpl/blob/a4fe37f4d78473f97c6d47cf93d97c3811af90cc/release/src-mtk-MT798X/Uboot-upstream/tools/mkimage.c#L317-L333>).
# For example, this is the case in
# `RT-AX52_3.0.0.4_388_34015-g9488655.trx` from
# <https://dlcdnets.asus.com/pub/ASUS/wireless/RT-AX52/FW_RT-AX52_300438834015.zip>,
# released on 2026-03-20 and listed on
# <https://www.asus.com/supportonly/rt-ax52/helpdesk_bios?model2Name=RT-AX52>.
def has_asus_info
return @has_asus_info unless @has_asus_info.nil?
@has_asus_info = ((byte0 < 32) && (byte4 >= 32) && (byte4 < 127))
@has_asus_info
end
attr_reader :name
attr_reader :asus_info
end
class Uheader < Kaitai::Struct::Struct
def initialize(_io, _parent = nil, _root = nil)
super(_io, _parent, _root)
_read
end
def _read
@magic = Kaitai::Struct::Stream::resolve_enum(Uimage::MAGIC_TYPES, @_io.read_u4be)
raise Kaitai::Struct::ValidationNotInEnumError.new(@magic, @_io, "/types/uheader/seq/0") if not Uimage::I__MAGIC_TYPES.key?(@magic)
@header_crc = @_io.read_u4be
@timestamp = @_io.read_u4be
@len_image = @_io.read_u4be
@load_address = @_io.read_u4be
@entry_address = @_io.read_u4be
@data_crc = @_io.read_u4be
@os_type = Kaitai::Struct::Stream::resolve_enum(Uimage::UIMAGE_OS, @_io.read_u1)
raise Kaitai::Struct::ValidationNotInEnumError.new(@os_type, @_io, "/types/uheader/seq/7") if not Uimage::I__UIMAGE_OS.key?(@os_type)
@architecture = Kaitai::Struct::Stream::resolve_enum(Uimage::UIMAGE_ARCH, @_io.read_u1)
raise Kaitai::Struct::ValidationNotInEnumError.new(@architecture, @_io, "/types/uheader/seq/8") if not Uimage::I__UIMAGE_ARCH.key?(@architecture)
@image_type = Kaitai::Struct::Stream::resolve_enum(Uimage::UIMAGE_TYPE, @_io.read_u1)
raise Kaitai::Struct::ValidationNotInEnumError.new(@image_type, @_io, "/types/uheader/seq/9") if not Uimage::I__UIMAGE_TYPE.key?(@image_type)
@compression_type = Kaitai::Struct::Stream::resolve_enum(Uimage::UIMAGE_COMP, @_io.read_u1)
raise Kaitai::Struct::ValidationNotInEnumError.new(@compression_type, @_io, "/types/uheader/seq/10") if not Uimage::I__UIMAGE_COMP.key?(@compression_type)
_io_name_or_asus_info = @_io.substream(32)
@name_or_asus_info = NameOrAsusInfo.new(_io_name_or_asus_info, self, @_root)
self
end
##
# Besides the standard U-Boot magic, some vendors' bootloaders expect
# their own value (often a different one for each device model), with
# the rest of the header unchanged. `magic_types` lists the values
# known so far; images with any other magic are rejected.
attr_reader :magic
attr_reader :header_crc
attr_reader :timestamp
attr_reader :len_image
attr_reader :load_address
attr_reader :entry_address
attr_reader :data_crc
attr_reader :os_type
attr_reader :architecture
attr_reader :image_type
attr_reader :compression_type
attr_reader :name_or_asus_info
attr_reader :_raw_name_or_asus_info
end
class Version < Kaitai::Struct::Struct
def initialize(_io, _parent = nil, _root = nil)
super(_io, _parent, _root)
_read
end
def _read
@major = @_io.read_u1
@minor = @_io.read_u1
self
end
attr_reader :major
attr_reader :minor
end
attr_reader :header
attr_reader :data
end