The only way to fight such an opponent is to have an army of highly competetent coders who write equivalent drivers for free, which Linux does.

Software developers wrote custom interfaces and drivers for each piece of hardware.

The alternative is for developers to write specific drivers for each type of telephone system.

More software developers are starting to write sound drivers for Sound Blaster.

No support for writing pure user-mode drivers.

Network - writes drivers for network devices and APIs relating to networking.

The task of writing drivers thus usually falls to software engineers or computer engineers who work for hardware-development companies.

I used to argue that things would break, b/c hardware companies wouldn't write drivers for Linux.

HFS requirements should not prevent the disclosure of all the information needed to write drivers.

But he's saying even though it's necessary not to disclose everything, it's not necessary that everything be disclosed in order to write fully functional drivers.