From e8b8e8754340941d10b1cbba48cfb46f62668545 Mon Sep 17 00:00:00 2001
From: sorgelig <pour.garbage@gmail.com>
Date: Tue, 23 Jun 2020 02:54:36 +0800
Subject: [PATCH] megacd: support subfolders with cd_bios.rom per folder.

---
 support/megacd/megacd.cpp | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/support/megacd/megacd.cpp b/support/megacd/megacd.cpp
index fa0b41d..368d5cc 100644
--- a/support/megacd/megacd.cpp
+++ b/support/megacd/megacd.cpp
@@ -128,8 +128,21 @@ void mcd_set_image(int num, const char *filename)
 		user_io_8bit_set_status(0, 1);
 		mcd_reset();
 
-		sprintf(buf, "%s/boot.rom", HomeDir());
-		loaded = user_io_file_tx(buf);
+		loaded = 0;
+		strcpy(buf, last_dir);
+		char *p = strrchr(buf, '/');
+		if (p)
+		{
+			strcpy(p + 1, "cd_bios.rom");
+			loaded = user_io_file_tx(buf);
+		}
+
+		if (!loaded)
+		{
+			sprintf(buf, "%s/boot.rom", HomeDir());
+			loaded = user_io_file_tx(buf);
+		}
+
 		if (!loaded) Info("CD BIOS not found!", 4000);
 	}