ureal mode

flat assembler
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amitkumartiwari29

Joined: 25 Sep 2005
Posts: 2
Location: India

amitkumartiwari29 26 Sep 2005, 22:41

Can you tell me a program in ASM to check if my system is in Unreal mode or not or a program to create an array of 3 GB.

Thanks and regards

_________________
How to test that the system is in real flat 4gb mode through a C program.

Please help!

26 Sep 2005, 22:41

vid
Verbosity in development

Joined: 05 Sep 2003
Posts: 7105
Location: Slovakia

vid 27 Sep 2005, 07:27

you have computer with 3gb RAM?

27 Sep 2005, 07:27

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20338
Location: In your JS exploiting you and your system

revolution 27 Sep 2005, 08:07

Try this:

Code:

use32
smsw eax
shr eax,1 ;test for PE
jc SystemIsInPortectedMode
or eax,-1
shr eax,16
jz SystemIsInRealMode
use32
;code for unreal mode goes here
ret
SystemIsInRealMode:
use16
;code for real mode goes here
ret
SystemIsInPortectedMode:
use32
;code for protected mode goes here
ret

If you need it in C then you can probably use inline assembly.

Assemble for 32 bit run mode (use32). If the code is running in 16 bit mode (real mode) at run time then it will still run but using AX instead of EAX.

27 Sep 2005, 08:07

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