Initialize keyboard emulation on port reading.

This ensures that applications that only read the keyboard port works.

Author: dmsc

src/keyb.c

@@ -478,6 +478,8 @@ void update_keyb(void)
 // Handle keyboard controller port reading
 uint8_t keyb_read_port(unsigned port)
 {
+    if(queued_key == -1)
+        kbhit();
     debug(debug_int, "keyboard read_port: %02X (key=%04X)\n", port, queued_key);
     if(port == 0x60)
         return queued_key >> 8;