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Programming > Assembly x86 > Re: vga bios in...
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Re: vga bios initialization entry point

by Cyril Novikov <spamtrap@[EMAIL PROTECTED] > Apr 21, 2008 at 08:43 AM

stamari@[EMAIL PROTECTED]
 wrote:
> Hi,
> 
> My desktop machine has an Intel integrated vga chip:
> 00:02.0 VGA compatible controller: Intel Cor****ation 82G965 Integrated
> Graphics Controller (rev 02)
> 
> I disassembled the code at C000: and got this:
> 0000c0000 55               push bp
> 0000c0001 aa               stosb
> 0000c0002 58               pop ax
> 0000c0003 e919a8           jmp 0xba81f

> How come the vga bios jumps to code that starts at an address that is
> smaller than C0000?
> The jump at C0014 jumps to some code that looks like the card's actual
> initialization code. Any reason why this jmp is placed at offset 14h ?
> 
> Anyone here got any idea what I'm seeing?

What makes you think the code at c0000 is executable? "55 aa" looks like 
some signature.

--
Cyril
 




 7 Posts in Topic:
vga bios initialization entry point
"stamari@[EMAIL PROT  2008-04-21 00:24:22 
Re: vga bios initialization entry point
Brendan <spamtrap@[EM  2008-04-21 07:07:12 
Re: vga bios initialization entry point
Cyril Novikov <spamtr  2008-04-21 08:43:11 
Re: vga bios initialization entry point
ArarghMail804NOSPAM <s  2008-04-21 05:09:11 
Re: vga bios initialization entry point
"stamari@[EMAIL PROT  2008-04-21 10:49:48 
Re: vga bios initialization entry point
"stamari@[EMAIL PROT  2008-04-21 11:33:38 
Re: vga bios initialization entry point
Mike Gonta <spamtrap@  2008-04-25 13:55:30 

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tan12V112 Sun Jul 6 20:08:24 CDT 2008.