int32.h

// define our structure
typedef struct __attribute__ ((packed)) {
    unsigned short di, si, bp, sp, bx, dx, cx, ax;
    unsigned short gs, fs, es, ds, eflags;
} regs16_t;

// Map some lowmem pages for BIOS call purposes. The implementations of these live in vm.c for now. 
pte_t biosmap();
void biosunmap(pte_t original);

// tell compiler our int32 function is external
extern void int32(unsigned char intnum, regs16_t *regs);

extern void bios_int(unsigned char intnum, regs16_t* regs);

// int32 test
/*void int32_test()
{
    int y;
    regs16_t regs;
     
    // switch to 320x200x256 graphics mode
    regs.ax = 0x0013;
    int32(0x10, &regs);
     
    // full screen with blue color (1)
    memset((char *)0xA0000, 1, (320*200));
     
    // draw horizontal line from 100,80 to 100,240 in multiple colors
    for(y = 0; y < 200; y++)
        memset((char *)0xA0000 + (y*320+80), y, 160);
     
    // wait for key
    regs.ax = 0x0000;
    int32(0x16, &regs);
     
    // switch to 80x25x16 text mode
    regs.ax = 0x0003;
    int32(0x10, &regs);
}*/