Implement BmPrint() routine

xtldr2/includes/bootman.h

@@ -32,6 +32,11 @@ XTCDECL
 VOID
 BmInitializeConsole();
 
+XTCDECL
+VOID
+BmPrint(IN PUINT16 Format,
+        IN ...);
+
 XTCDECL
 VOID
 BmPrintChar(IN USHORT Character);

xtldr2/includes/globals.h

@@ -15,6 +15,9 @@
 /* XT Boot Loader hex table */
 EXTERN PUINT16 BmpHexTable;
 
+/* Serial port configuration */
+EXTERN CPPORT BmpSerialPort;
+
 /* EFI Image Handle */
 EXTERN EFI_HANDLE EfiImageHandle;