#include <dos.h>

static void adlib_wait(int delay) {
  int i;
  for (i = 0; i < delay; i ++) inp(0x388);
}

void adlib_write(int reg, int val) {
  int i;
  outp(0x388, reg);
  adlib_wait(6);
  outp(0x389, val);
  adlib_wait(35);
}