Re: Can I call the BIOS in my kernel?

To: David Nowak <nowak@lineone.net>
Subject: Re: Can I call the BIOS in my kernel?
From: Leigh Stoller <stoller@fast.cs.utah.edu>
Date: Mon, 9 Apr 2001 06:40:59 -0700
Cc: oskit-users@fast.cs.utah.edu
In-Reply-To: <3ACF2ED5.8CC03738@lineone.net>
References: <3ACF2ED5.8CC03738@lineone.net>
Sender: owner-oskit-users@fast.cs.utah.edu

> From: David Nowak <nowak@lineone.net>
> Subject: Can I call the BIOS in my kernel?
> Date: Sat, 07 Apr 2001 16:14:29 +0100
> 
> Can I call the (real mode) BIOS in my kernel?  Could you give me an
> example?

Sure. Here is an example from boot/pxe/main.c.

    #include <oskit/x86/i16.h>
    #include <oskit/x86/base_trap.h>
    #include <oskit/x86/base_vm.h>
    #include <oskit/x86/pc/base_i16.h>

    int
    biosread(int device, int cyl, int head, int sector, int count, void *addr)
    {
    	ts.trapno	= 0x13;
    	ts.eax		= (0x2 << 8)  | count;
    	ts.ecx		= (cyl << 8)  | sector;
    	ts.edx		= (head << 8) | device;
    	ts.ebx		= (oskit_u32_t) addr;
    	ts.v86_es	= 0;
    
    	base_real_int(&ts);
    	return ts.eax & 0xFF;
    }
    
Lbs

----------------------------------------
Leigh B. Stoller
University of Utah - Flux Research Group
http://www.cs.utah.edu/~stoller
----------------------------------------

References:

Can I call the BIOS in my kernel?

From: David Nowak <nowak@lineone.net>

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