Another massive cleanup run. Ibm.h no longer includes system header files. ROM loading simplified, and moved from mem.c to rom.c. Fixes in Makefile. Corrected mamy wrong includes. Removed old junk from days long gone. First phase of new SCAT chipset driver - no longer gives errors in BIOS, but NOT DONE YET.

src/video/vid_pc200.c

@@ -4,7 +4,11 @@
 /*PC200 video emulation.
   CGA with some NMI stuff. But we don't need that as it's only used for TV and
   LCD displays, and we're emulating a CRT*/
+#include <stdio.h>
+#include <stdint.h>
+#include <string.h>
 #include <stdlib.h>
+#include <wchar.h>
 #include "../ibm.h"
 #include "../io.h"
 #include "../mem.h"