#include <sys/io.h>
#include <sys/mman.h>
#include <signal.h>
#include <stdio.h>
#include <stdint.h>


uint16_t *data;

void segv()
{
    printf("SEGV\n");
    data = mmap(data, 4096, PROT_READ | PROT_WRITE,
                MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, -1, 0);
    if (data == MAP_FAILED) {
        exit(1);
    }
}

int main()
{
    int i;
    unsigned char v;
 
    data = mmap(0, 4096, PROT_NONE,
                MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
    if (data == MAP_FAILED) {
        exit(1);
    }
    signal(SIGSEGV, segv);

    iopl(3);

    do {
        v = inb(0x0177);
    } while ((v & 0xc0) != 0x40);
    outb(0x00, 0x0176);
    outb(0xa1, 0x0177);
    do {
        v = inb(0x0177);
    } while ((v & 0x08) != 0x08);
    insw(0x0170, data, 256);
    for(i = 0; i < 256; ++ i) {
        printf("%04x%c", data[i], (i % 8 != 7)? ' ': '\n');
    }
}