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Index > OS Construction > Calling my own kernel from my own boot loader

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MarcoAlves



Joined: 09 Jun 2006
Posts: 30
MarcoAlves
Hi all.

I'm new on asm and os construction. But a senior hll programmer.

I'm trying to load my kernel from my own boot loader. But without success.

I think that the problem is on a combination of factors, such as
use16, ORG 0x7C00, and that my kernel resides in other object file.

Some cases, when I make:

Code:
use16 ; for boot loader

extrn labelname
call labelname
    


it simply doesn't compile.

But, if a make in a test file :

Code:
use32

extrn labelname
call labelname
    


It compiles.

More. If I TRY to

Code:
use32

ORG 0x7C00 ; The BIOS loads the boot sector into this memory location

extrn labelname
call labelname
    


It doesn't compiles, too.

Please, explain WHY this happens.
How I can load my kernel written in C from my own asm bootloader? I don't want to link both together. I just they
resides in separate binary files.

I wanna understand the bits.

The code is attached.

Please help-me.

Thanks in advance.

Best regards,
Marco Alves.


Description:
Download
Filename: boot.asm
Filesize: 1.84 KB
Downloaded: 86 Time(s)

Post 19 Jun 2006, 12:53
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Dex4u



Joined: 08 Feb 2005
Posts: 1601
Location: web
Dex4u
This link may help you with your problem
http://www.elet.polimi.it/upload/fornacia/progetto_minazzi/index.html
as well as reading the info the info, get the source "scr.zip"
Post 19 Jun 2006, 15:06
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MarcoAlves



Joined: 09 Jun 2006
Posts: 30
MarcoAlves
I'd tried to download src.zip but the server responds "Method Not Allowed". Do you've this file and can put it here?
Post 19 Jun 2006, 16:09
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Dex4u



Joined: 08 Feb 2005
Posts: 1601
Location: web
Dex4u
I try this:


Description:
Download
Filename: src.zip
Filesize: 10.34 KB
Downloaded: 93 Time(s)

Post 19 Jun 2006, 19:18
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MarcoAlves



Joined: 09 Jun 2006
Posts: 30
MarcoAlves
thx a lot
Post 19 Jun 2006, 20:46
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