--- Gnu-Mach/device/cons.h	2020/09/02 04:45:31	1.1.1.2
+++ Gnu-Mach/device/cons.h	2020/09/02 04:50:06	1.1.1.3
@@ -54,4 +54,15 @@ extern int cngetc(void);
 extern int cnmaygetc(void);
 
 extern void cnputc(char);
+
+/*
+ * ROM getc/putc primitives.
+ * On some architectures, the boot ROM provides basic character input/output
+ * routines that can be used before devices are configured or virtual memory
+ * is enabled.  This can be useful to debug (or catch panics from) code early
+ * in the bootstrap procedure.
+ */
+extern int	(*romgetc)(char c);
+extern void	(*romputc)(char c);
+
 #endif /* _DEVICE_CONS_H */