diff --git a/constants/dss_equ.inc b/constants/dss_equ.inc
index 8c3886b..3a6fb89 100644
--- a/constants/dss_equ.inc
+++ b/constants/dss_equ.inc
@@ -426,6 +426,40 @@ _cc:
  ENDS
 ;
 
+;
+ STRUCT	DSS_FCB_MAIN		; File Control Block
+.NAME:				BLOCK	8," "			;+ #00 +00. NAME
+.EXT:				BLOCK	3," "			;+ #08 +08. EXT
+.SEARCH_ATTRIBUT		BYTE	FAT_ATTR.DIRECTORY	;+ #0B +11.
+.RESERVED_NT:			BYTE	0			;+ #0C +12. RESERVED
+.RESERVED_FAT32:		BYTE	0			;+ #0D +13. RESERVED
+.CREATE_TIME_FAT32:		WORD	0			;+ #0E +14. RESERVED
+.CREATE_DATE_FAT32:		WORD	0			;+ #10 +16. RESERVED
+.RESERVED_FAT32_1:		WORD	0			;+ #12 +18. RESERVED
+.FIRST_CLUSTER_H:		WORD	0			;+ #14 +20. START CLUSTER high
+.TIME:				WORD	0			;+ #16 +22. TIME
+.DATE:				WORD	0			;+ #18 +24. DATE
+.FIRST_CLUSTER_L:		WORD	0			;+ #1A +26. START CLUSTER low
+.F_SIZE:			DWORD	0			;+ #1C +28. SIZE FILE
+.ATTRIBUT:			BYTE	FAT_ATTR.DIRECTORY	;+ #20 +32. ATTRIBUT
+ ENDS								;+ #21 +33.
+;
+ STRUCT	DSS_FCB_FAT_NAME
+.MAIN				DSS_FCB_MAIN
+.FULL_FILE_NAME			BLOCK 11," "			;+ #21 +33. 11 symbols fat name
+ ENDS 								;+ #2B +43.
+
+ STRUCT	DSS_FCB_DOS_NAME
+.MAIN				DSS_FCB_MAIN
+.FULL_FILE_NAME			BLOCK 13," "	;+ #21 +33. 12 symbols fat name + zero byte
+ ENDS						;+ #2E +46. for DOS name
+
+; !TODO
+ STRUCT	DSS_FCB_MAIN		; Extended File Control Block
+; LFN
+; Many files in dir
+; ...
+ ENDS	DSS_EFCB
 
 ; Приложение Б. Таблица позиционных кодов