+int LoadSBI(const char *fname, int sector_count);
+void UnloadSBI(void);
+
+extern unsigned char *sbi_sectors;
+extern int sbi_len;
+
+#include "cdrom.h"
+
+static inline int CheckSBI(int s)
+{
+ if (sbi_sectors == NULL)
+ return 0;
+ if ((unsigned int)(s >> 3) >= (unsigned int)sbi_len)
+ return 0;
+
+ return (sbi_sectors[s >> 3] >> (s & 7)) & 1;
+}
+