--- a/romdb.c	Thu Oct 19 03:21:24 2017 -0700
+++ b/romdb.c	Mon Jan 15 09:04:43 2018 -0800
@@ -11,6 +11,7 @@
 #include "nor.h"
 #include "sega_mapper.h"
 #include "multi_game.h"
+#include "megawifi.h"
 
 #define DOM_TITLE_START 0x120
 #define DOM_TITLE_END 0x150
@@ -778,6 +779,12 @@
 		map->mask = 0xFF;
 		map->write_16 = write_multi_game_w;
 		map->write_8 = write_multi_game_b;
+	} else if (!strcmp(dtype, "megawifi")) {
+		map->write_16 = megawifi_write_w;
+		map->write_8 = megawifi_write_b;
+		map->read_16 = megawifi_read_w;
+		map->read_8 = megawifi_read_b;
+		map->mask = 0xFFFFFF;
 	} else {
 		fatal_error("Invalid device type %s for ROM DB map entry %d with address %s\n", dtype, state->index, key);
 	}