HDD image

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BOTOKILLER

Joined: 07 Jan 2011
Posts: 154
Location: Ukraine

BOTOKILLER 07 Apr 2011, 13:16

Hi everyone!
Is there any code to create hard disk images?

07 Apr 2011, 13:16

b1528932

Joined: 21 May 2010
Posts: 287

b1528932 07 Apr 2011, 16:54

what?

07 Apr 2011, 16:54

cod3b453

Joined: 25 Aug 2004
Posts: 618

cod3b453 07 Apr 2011, 17:01

This is a basic example of how it might look:

Code:

SECTOR_SIZE equ 512

; Sector 0
include 'boot.asm'

align SECTOR_SIZE
; Sector 1
fs_table:

;...

db 'file.name'
dd fs_loader.size ; byte size
dd (fs_loader / SECTOR_SIZE) ; lba

;...

align SECTOR_SIZE
; Sector X
fs_loader:

include 'loader.asm'

fs_loader.size equ $ - fs_loader
; Sector X+1
align SECTOR_SIZE

; ...

For my own disk images I have a LOT of macros that handle sector size checking, file entry generation and any other data tables I need for a valid image (cd/hd/fd/...).

Note that by including the code (.asm) you can use the labels defined here directly in your code so that at compile-time so you don't have to manually edit values or do things at run time.

Alternatively, you can use "file 'boot.bin'" to include only the assembled binary data; this may be useful as it prevent name clashing in your sources.

07 Apr 2011, 17:01

BOTOKILLER

Joined: 07 Jan 2011
Posts: 154
Location: Ukraine

BOTOKILLER 07 Apr 2011, 17:02

I mean like I used code from cod3... on this page http://board.flatassembler.net/topic.php?t=12160
to create .ISO file with FASM, Is there anythink like this for hard disk drives??

07 Apr 2011, 17:02

BOTOKILLER

Joined: 07 Jan 2011
Posts: 154
Location: Ukraine

BOTOKILLER 08 Apr 2011, 11:43

cod3b453 wrote:

This is a basic example of how it might look:
Code:
SECTOR_SIZE equ 512

; Sector 0
include 'boot.asm'

align SECTOR_SIZE
; Sector 1
fs_table:

;...

db 'file.name'
dd fs_loader.size ; byte size
dd (fs_loader / SECTOR_SIZE) ; lba

;...

align SECTOR_SIZE
; Sector X
fs_loader:

include 'loader.asm'

fs_loader.size equ $ - fs_loader
; Sector X+1
align SECTOR_SIZE

; ...    
For my own disk images I have a LOT of macros that handle sector size checking, file entry generation and any other data tables I need for a valid image (cd/hd/fd/...).

Note that by including the code (.asm) you can use the labels defined here directly in your code so that at compile-time so you don't have to manually edit values or do things at run time.

Alternatively, you can use "file 'boot.bin'" to include only the assembled binary data; this may be useful as it prevent name clashing in your sources.

oes this code works?
what is th output format?

08 Apr 2011, 11:43

cod3b453

Joined: 25 Aug 2004
Posts: 618

cod3b453 08 Apr 2011, 17:19

That code would work if the contents of boot.asm are correct. BUT it will NOT work for any other OS because it's a format I just made up.

----

You usually need to define a partition table in your boot sector with the boot signature. The sectors after that then depend on the file system (if any) you want to use. Again, you need to define these in the right place. See MBR and optionally GPT documentation for how this works and then any docs for the file system you want.

08 Apr 2011, 17:19

BOTOKILLER

Joined: 07 Jan 2011
Posts: 154
Location: Ukraine

BOTOKILLER 09 Apr 2011, 04:32

all right guys, for now I'll try to play with heximal editor and find out the structyure of this image

09 Apr 2011, 04:32

codelab

Joined: 03 Apr 2006
Posts: 16
Location: Denmark

codelab 14 Apr 2011, 23:02

Hi BOTO

I by chance posted this here:

http://board.flatassembler.net/topic.php?t=12743

just to see your topic later.

14 Apr 2011, 23:02

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