x86 Programming

[Strangelove]

What do mean you have drivers? If you have a hardware driver for ATA hard-disks I fail to see the problem. I already told you how to do this. No one here wants to spoon-feed you because you're too lazy to read existing documentation or source code.

Unless you don't have a harddisk driver in which case you're out of luck. You can't access the harddisk or any other hardware from protected mode without a driver for the device. ISRs are in 99% of all cases real-mode only! So stick to real-mode (like I already told you).

Advertising

[m0skit0]

You can't access the harddisk or any other hardware from protected mode without a driver for the device.

Sorry but the drivers run on protected mode, like on all modern OS, so you can access hardware from protected mode perfectly. You might have a confusion with the fact that user-mode processes cannot access the hardware when in protected mode (and even so this is not correct anyway). There are mechanisms built into the CPU to help multitasking and memory/hardware access protection, but that doesn't mean his/my/your/any OS has to implement them. It depends on the OS design.

Advertising

[Strangelove]

@m0skit0: I was programming hardware drivers when most of the users on this forum was still wearing diapers! And the first computer I programmed on wasn't even Intel architecture, although it's Intel architecture I know best. Don't be fooled just because I simplify an explanation.

I don't like wasting my time on people that don't have the patience to read documentation. It's quite enough to point them in the right direction, which I am nice enough to do.