It seems you forgot to map your code into memory, you have only mapped a single page at address 0.

...Hum, if i understand, i have forget to map since 0x1000 address ? Is it that ?

Yes, if your code is at address 0x1000, then you need to actually map the memory containing that code there, otherwise CPU is not going to have anything to execute.

I have doing this, but this don't work. I think i'm tired

Remember that all page tables need to have addresses of form 0XXXXX000h, what you can ensure with ALIGN directive:

Oh yes ... Thanks for your help

Just little question. I'm tired to always calculate the good size of my size to have always multipe of 512 bytes.

Are there any solution to calculate the appropriate size ?
For example if my file after compilation have size of 6000 bytes, if i would like to calculate how many 512 sectors i need, is it possible to test the result when the result is decimal number ?

(6000 / 512 = 11.71865) -> i need 12 sectors (for make floppy image)

You can use ALIGN to find out the nearest boundary and then pad with a filling of your choice: If you use just plain ALIGN at the end of file, it makes a reserved data which is cut off, but there is also a trick to enforce its initialization with a single STORE:

Hum interesting, i don't know this command. And i have finally found other way to do that. I have seen FASM support conditionnal instruction. Thanks you very much for your help !