Hello, i have just one question, how is it possible in assembly to use multiprocessoring ? Have you got simple example ?

Depends on what you mean by “multiprocessoring”, i.e. what particular task you’re trying to solve.

If you are using an existing OS then you can use the threading APIs to get other threads running.

Then there are the synchronisation APIs you can use to get things happening in the sequence you need.

No, its about os construction.

For example, i would like to use first core or my processor to launch 16bits code, and use second to launch 64bits code.

Is it possible ?

Moved to "OS Construction"

This topic may help: https://board.flatassembler.net/topic.php?p=108312

You have to send inter-processor interrupts (IPI) to the other cores, which requires that interrupts are properly set up for IO APIC, which in turn requires either the multi-processor (MP) table information from BIOS or (if I remember correctly) the later x2APIC and ACPI tables.

I have looked your example, but i don't understand very well.

How you can, for example launch in parralel 32 bits and 16 code at the same time. Is it in real time ? Or multiprocess is impossible ?