hi,

Really i should make a boot disk that at first sector be a bootloader then at second sector be an os that show the hardware specification in which you can see after POST in a table.can you help me?
thx

sure we can.
look there: http://board.flatassembler.net/forum.php?f=11&sid=87451ac49d62fe7f957211da8dc176ed.
you will find a lot of examples.

have you good a dos application that can do that? in this case, you just have to modify it a bit and put it on a bootable drive, with some manipulations.

can you be more precise about the "hardware spec"?

Thank u.but my problem is that i am not a pro.because i am networkman not a programer.guid me better

i repeat my question, wich hardware spec do speak about? DMI? I/O ports, PCI dump? all?

in this case goto http://osdev.org

if you just want an application to show what is the hardware config at boot-time, in case of no os on the machine for example, you will seek for one of the threads at the link i gave to you.

do you want to code in asm or just to obtain some free ready to use products?

i want asm code.
for example:

cpu intel

Ram gail

Hard maxtor.

...

i'm sorry to say this to you, but it isn't so simple. there are many norms, many mazes in all specifications, some hardware vendors don't broadcast their programming skills, and it will be more than one sector to obtain this kind of application. this can be named a product.

you will find this kind of software ready to use like aida32 for windows. but in asm, i don't know any soft able to boot and display what you want.

an easier method will be to open the machine and read what is writen on the components.

But i know that if we have the code that are in bios(Rom) .we can do that.is it true?

Of course it is possible to use the BIOS to run your hardware, but I don't know of any BIOS call that will give you the the hardware specs as such. You might need to write your own code to extract whatever specs you want to see. Hence the Q, what hardware do you want to examine?

I think you need to clarify some more, perhaps you can make a mock up with an editor to give an example of what you want to see. Then people will have a better idea of what you are after.

Like this

Well the work is not going to be so easy for a beginner. You have to learn about the motherboard interfaces (like SMBUS) also to be able to query things like the RAM type.

I suggest as a starting point you have a look at some existing OSes on this board that have code for using the devices that you want to display.

Search SMBIOS Spec. on google or learn about ACPI.
If you want to do low level access then:
1) for CPU use CPUID instruction (at least pentium)
2) for RAM use SMBUS ,read at address A0,A2,A4,A6,and so on ... for SPD (serial presence detect)
3) for HD use 'IDENTIFY DRIVE' command ( ECH)
for CDROM DVDROM use 'IDENTIFY DRIVE' command ( A1H)

note that is not for beginners ,start to learn ,then write your mini OS