I thought this would be the correct place for such a topic.
I/We are writing a simple OS (who isn't in this thread). The question i have is what is required for an interface to the compiler. For example, you have a seperate interface for dos/win32/ide/linux/menuetos.
They all have the same core engine for compiling the source, but what functions are needed to be called and such for a custom built os.
If i want FASM to work on my OS, what do i need. File IO, memory de/alloc ...? If you don't understand what i'm trying to say, i'll try to clarifiy in a subsequent post.

Thanx in advanced.

Read the chapter 2 of my guide to fasm internals/porting: http://board.flatassembler.net/topic.php?t=1972
It was written exactly for this purpose.

However it needs an update to cover the latest fasm releases. But the chapter 2 should be still correct even for the latest development releases.

Thanks Privalov , that will be a great help when porting fasm to "DEX" short for "Dos Extreme" .