Temporarily reverted to the PCem serial code (but kept waltje's in, optionally enabled by running make with WALTJE=y parameter);

Applied another A20 patch from Greatpsycho.

src/pc.c

@@ -512,6 +512,9 @@ void resetpchard_init(void)
         fdc_init();
 	disc_reset();
 
+#ifndef WALTJE
+	serial_init();
+#endif
         model_init();
         video_init();
         speaker_init();