bioscomp.c

这是一个符合posix.13 pse51的实时内核

/* Project:     HARTIK 3.0                      				*/
/* Description: Hard Real TIme Kernel for 386 & higher machines */
/* Author:  	Gerardo Lamastra               					*/
/* Date:    	9/5/96                     						*/
/* Revision:    Beta 1.0		                   				*/

/* File: bioscomp.C */
/* Emulation of X_callBIOS() function under 16 bit systems */

#include <hw86.h>
#include <stdlib.h>
#include <mem.h>

static INTERRUPT original_BIOS_IDT[256];
static INTERRUPT * const real_IDT = (INTERRUPT *)0;

void X_callBIOS_init(void)
{
    register i;
    for (i = 0; i < 256; i++) original_BIOS_IDT[i] = *(real_IDT+i);
}

void X_callBIOS(int service,X_REGS16 *in,X_REGS16 *out,X_SREGS16 *s)
{
    INTERRUPT tmp = *(real_IDT + service);
    VM_disable();
    *(real_IDT + service) = original_BIOS_IDT[service];
    int86x(service,in,out,s);
    *(real_IDT + service) = tmp;
    VM_enable();
}