diff --git a/src/boards/330.c b/src/boards/330.c
index e2453a3..4a3055a 100644
--- a/src/boards/330.c
+++ b/src/boards/330.c
@@ -94,8 +94,9 @@ static DECLFW(M330Write) {
 
 static void M330Power(void) {
 	int i;
-	for (i = 0; i < 4; i++)
-		PRG[i] = i;
+	PRG[0] = 0;
+	PRG[1] = 0;
+	PRG[2] = 0;
 	for (i = 0; i < 8; i++)
 		CHR[i] = i;
 	for (i = 0; i < 4; i++)