diff --git a/constants/SP2000.inc b/constants/SP2000.inc
index 02a040b..bf543c1 100644
--- a/constants/SP2000.inc
+++ b/constants/SP2000.inc
@@ -1,6 +1,9 @@
 ;
 	DEFDEVICE SPRINTER, #4000, 256
 
+	DEFINE	SLOT? +(SLOT0 | ((#C0 & high $)>>>1))
+	DEFINE	OFFSET? +(SLOT3 ^ SLOT?)*512
+
 	IFNDEF _includedSP2000 : DEFINE _includedSP2000 : ENDIF
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;			  Прерывания				 ;
@@ -388,7 +391,6 @@ SCR_SyncPort	EQU #FE
 ;---------------------------------------
 ;
 
- DEFINE	SLOT? +( SLOT0 | ((#C0 & high $)>>>1) )
 SLOT0			EQU #82					; номер банки 0
 .MEM_ADDR		EQU #00
 SLOT1			EQU #A2					; номер банки 1
@@ -2051,6 +2053,22 @@ REG:
 	;=======================================================================;
 
 ;__________________________________________________________________________________________________________#
+;  MACRO	_mGET_FAT_START slot_num
+; .correct EQU (SLOT3 and slot_num)*2
+
+; 		IN A,(slot_num)
+; 		LD B,A
+; 		LD A,SYS_PAGE
+; 		OUT (slot_num),A
+; 		LD HL,SYS_PAGE.RAMD_FAT - .correct
+
+; 	DISPLAY "CORRECT	=	",/h,.correct
+;  ENDM
+
+;   MACRO	_mGET_FAT_END slot_num
+; 		OUT (slot_num),A  
+;   ENDM
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;
 ; DW #FEFF      ; Sprinter-2000
 ;