From d66df6bba1c6b9841a9ae22055db19c9858e6cb8 Mon Sep 17 00:00:00 2001
From: notaz <notasas@gmail.com>
Date: Sun, 23 Feb 2025 02:11:17 +0200
Subject: [PATCH] cdrom: don't deliver non mode1/2 sectors

---
 libpcsxcore/cdrom.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libpcsxcore/cdrom.c b/libpcsxcore/cdrom.c
index e9c6f884..926e7eca 100644
--- a/libpcsxcore/cdrom.c
+++ b/libpcsxcore/cdrom.c
@@ -1435,6 +1435,11 @@ static void cdrReadInterrupt(void)
 
 	if ((cdr.Mode & MODE_SF) && (subhdr->mode & 0x44) == 0x44) // according to nocash
 		deliver_data = 0;
+	if (buf[3] != 1 && buf[3] != 2) { // according to duckstation
+		deliver_data = 0;
+		CDR_LOG_I("%x:%02x:%02x mode %02x ignored\n",
+			buf[0], buf[1], buf[2], buf[3]);
+	}
 
 	/*
 	Croc 2: $40 - only FORM1 (*)
-- 
2.39.5