2 files changed, 17 insertions, 1 deletions
diff --git a/rom.db b/rom.db
index a1d9706..1be4279 100644
--- a/rom.db
+++ b/rom.db
@@ -1287,3 +1287,15 @@ e1c041ba69da087c428dcda16850159f3caebd4b {
 		}
 	}
 }
+31c66bd13abf4ae8271c09ec5286a0ee0289dbbc {
+	#Designed to run on Sega Channel hardware which is RAM-based
+	#writes to the this RAM qutie a bit to select games
+	name Game no Kanzume Otokuyou
+	map {
+		0 {
+			device ROM
+			last 3FFFFF
+			writeable yes
+		}
+	}
+}
diff --git a/romdb.c b/romdb.c
index a6afc80..983829b 100644
--- a/romdb.c
+++ b/romdb.c
@@ -559,8 +559,12 @@ void map_iter_fun(char *key, tern_val val, uint8_t valtype, void *data)
 	map->end = end + 1;
 	if (!strcmp(dtype, "ROM")) {
 		map->buffer = state->rom + offset;
-		map->flags = MMAP_READ;
 		map->mask = calc_mask(state->rom_size - offset, start, end);
+		if (strcmp(tern_find_ptr_default(node, "writeable", "no"), "yes")) {
+			map->flags = MMAP_READ;
+		} else {
+			map->flags = MMAP_READ | MMAP_WRITE | MMAP_CODE;
+		}
 	} else if (!strcmp(dtype, "LOCK-ON")) {
 		rom_info lock_info;
 		if (state->lock_on) {