#include "vt1200_xlib.h"

/*
 * XMapWindow maps with the true MapWindow entry (0x3FD64F60, request opcode
 * 8), not 0x3FD645B0: that address is XRaiseWindow (ConfigureWindow opcode
 * 12, CWStackMode=Above).
 */
#define MARK(n) (*(volatile unsigned int *)(0x018A8000u + (n) * 0x20u))

int xhello(void) {
  Display *d = XOpenDisplay("0::0");
  MARK(0) = (unsigned int)d;
  if (!d)
    return -1;
  unsigned int root = vt1200_root(d);
  MARK(1) = root;
  Window w = XCreateSimpleWindow(d, root, 100, 100, 400, 200, 2, 0, 1);
  MARK(2) = (unsigned int)w;
  XMapWindow(d, w);
  int s = XSync(d, 0);
  MARK(3) = (unsigned int)s;
  return (int)w;
}