-#define PC_SYS_USED 0x80 // palentry is used (both system and logical)
-#define PC_SYS_RESERVED 0x40 // system palentry is not to be mapped to
-#define PC_SYS_MAPPED 0x10 // logical palentry is a direct alias for system palentry
+#endif
+#define PC_SYS_USED 0x80 /* palentry is used (both system and logical) */
+#define PC_SYS_RESERVED 0x40 /* system palentry is not to be mapped to */
+#define PC_SYS_MAPPED 0x10 /* logical palentry is a direct alias for system palentry */