From c69642c80a8f3333354a589b5dabdb17f0f23e9b Mon Sep 17 00:00:00 2001
From: notaz <notasas@gmail.com>
Date: Sun, 30 Dec 2012 03:40:17 +0200
Subject: [PATCH 1/1] cdrom: keep savestate compat

---
 libpcsxcore/cdrom.c | 9 +++++++++
 libpcsxcore/cdrom.h | 2 +-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/libpcsxcore/cdrom.c b/libpcsxcore/cdrom.c
index 6923c021..78db2914 100644
--- a/libpcsxcore/cdrom.c
+++ b/libpcsxcore/cdrom.c
@@ -1648,6 +1648,7 @@ int cdrFreeze(void *f, int Mode) {
 	if (Mode == 0 && !Config.Cdda)
 		CDR_stop();
 	
+	cdr.freeze_ver = 0x63647201;
 	gzfreeze(&cdr, sizeof(cdr));
 	
 	if (Mode == 1) {
@@ -1672,6 +1673,14 @@ int cdrFreeze(void *f, int Mode) {
 			if (!Config.Cdda)
 				CDR_play(cdr.SetSectorPlay);
 		}
+
+		if ((cdr.freeze_ver & 0xffffff00) != 0x63647200) {
+			// old versions did not latch Reg2, have to fixup..
+			if (cdr.Reg2 == 0) {
+				SysPrintf("cdrom: fixing up old savestate\n");
+				cdr.Reg2 = 7;
+			}
+		}
 	}
 
 	return 0;
diff --git a/libpcsxcore/cdrom.h b/libpcsxcore/cdrom.h
index 7bca8119..541a12b9 100644
--- a/libpcsxcore/cdrom.h
+++ b/libpcsxcore/cdrom.h
@@ -60,7 +60,7 @@ typedef struct {
 	} subq;
 	unsigned char TrackChanged;
 	unsigned char pad1[3];
-	unsigned int  pad3;
+	unsigned int  freeze_ver;
 
 	unsigned char Prev[4];
 	unsigned char Param[8];
-- 
2.39.2