/*
 * python version:
 * -------------------------------------------------------------

from periphery import MMIO
import time
mmio_base = 0xfebd4000
mmio_range = 0x1000
mmio = MMIO(mmio_base, mmio_range)
mmio.write16(0x0504, 0x4000)
time.sleep(1) # wait screen refreshing

mmio.write8(0x040E, 0x85)
mmio.write8(0x040F, 0xB4)
mmio.write8(0x0404, 0x49)
mmio.write8(0x0405, 0xFC)
time.sleep(1) # wait screen refreshing

mmio.write8(0x0507, 0x20)

 * -------------------------------------------------------------
 * below is the c version, not requiring the vga mmio bar,
 * using io port access to vga and vbe ports instead.
 *
 * see docs/specs/standard-vga.txt in qemu repo for mmio bar spec.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <sys/io.h>

int main(int argc, char *argv[])
{
    if (ioperm(0x3c0, 0x20, 1) < 0) {
        perror("ioperm vga");
        exit(1);
    }
    if (ioperm(0x1ce, 0x04, 1) < 0) {
        perror("ioperm vbe");
        exit(1);
    }

    fprintf(stderr, "#1 ... \n");
    // mmio.write16(0x0504, 0x4000)
    outw(0x0002, 0x1ce);
    outw(0x4000, 0x1d0);
    sleep(1);

    fprintf(stderr, "#2 ... \n");
    // mmio.write8(0x040E, 0x85)
    outb(0x85, 0x3ce);
    // mmio.write8(0x040F, 0xB4)
    outb(0xb4, 0x3cf);
    // mmio.write8(0x0404, 0x49)
    outb(0x49, 0x3c4);
    // mmio.write8(0x0405, 0xFC)
    outb(0xfc, 0x3c5);
    sleep(1);

    // mmio.write8(0x0507, 0x20)
    fprintf(stderr, "#3 ... \n");
    outw(0x0003, 0x1ce);
    outw(0x0020, 0x1d0);
    sleep(1);

    fprintf(stderr, "done\n");
    exit(0);
}