diff --git a/constants/dss_equ.inc b/constants/dss_equ.inc
index 2677159..1f89b62 100644
--- a/constants/dss_equ.inc
+++ b/constants/dss_equ.inc
@@ -273,7 +273,7 @@ sys:
 .WRITE_PROTECT          EQU #18    ; 24 - защита записи
 .READ_ERROR             EQU #19    ; 25 - ошибка чтения
 .WRITE_ERROR            EQU #1A    ; 26 - ошибка записи
-;.GENERAL_FAILURE       EQU #1B    ; 27 - общая ошибка
+;.GENERAL_FAILURE       EQU #1B    ;  27 - общая ошибка
 .DRIVE_FAILURE          EQU #1B    ; 27 - сбой диска
 ;.RESERVED_28           EQU #1C    ; 28 - зарезервирован
 ;.RESERVED_29           EQU #1D    ; 29 - зарезервирован
diff --git a/macroses/macros.z80 b/macroses/macros.z80
index 8a1f2b7..3eede33 100644
--- a/macroses/macros.z80
+++ b/macroses/macros.z80
@@ -140,6 +140,72 @@
  ENDM
 ;=======================================
 
+;=======================================
+ MACRO _mCHECK_SYS_VERSIONS dss_v, dss_m, dss_b, bios_v, bios_m
+
+	DEFINE MIN_DSS_VERSION		dss_v*256 + dss_m
+	DEFINE MIN_DSS_BUILD		dss_b
+	DEFINE MIN_BIOS_VERSION		bios_v*256 + bios_m
+	;
+	DEFINE TXT_DSS_VERSION	('0'+dss_v),\
+ 				'.',\
+				('0'+dss_m/10),\
+				('0'+dss_m-(dss_m/10)*10),\
+				'.',\
+				('0'+dss_b/100),\
+				('0'+(dss_b/10 - dss_b/100*10)),\
+				('0'+(dss_b - dss_b/10*10)) ;
+	;
+	DEFINE TXT_BIOS_VERSION '0'+bios_v,\
+ 			 	'.',\
+			 	'0'+bios_m/10,\
+			 	'0'+bios_m-(bios_m/10)*10
+	;
+	LD	C,Dss.Version
+	RST	ToDSS
+	JR	C,.Error_DOS
+	LD	HL,MIN_DSS_VERSION
+	EX	DE,HL
+	SBC	HL,DE
+	JR	C,.Error_DOS
+	;
+	LD	HL,-(MIN_DSS_BUILD)
+	ADD	HL,BC
+	JR	NC,.Error_DOS
+	;
+	LD	C,BIOS.DRV_VERSION
+	RST	ToBIOS
+	JR	C,.Error_BIOS
+	LD	HL,-(MIN_BIOS_VERSION)
+	ADD	HL,DE
+	RET	C
+.Error_BIOS:
+	LD	HL,.MSG.Error_BIOS
+	JR	.next
+.Error_DOS:
+	LD	HL,.MSG.Error_DSS
+.next:	LD	C,Dss.PChars 
+	RST	ToDSS
+	;
+.loop:	LD	B,DSS_Error.sys.COMMON_ERROR
+.error:	LD	C,Dss.Exit
+	RST	ToDSS
+	JR	.loop
+	;
+.MSG.Error_BIOS:
+	DB "\r\nERROR! Uncompatible version of BIOS. Needs version ",TXT_BIOS_VERSION," or higher.\r\n",0
+.MSG.Error_DSS:
+	DB "\r\nERROR! Uncompatible version of DSS. Needs version ",TXT_DSS_VERSION," or higher.\r\n",0
+	;
+	UNDEFINE MIN_DSS_VERSION	
+	UNDEFINE MIN_DSS_BUILD	
+	UNDEFINE MIN_BIOS_VERSION	
+	UNDEFINE TXT_DSS_VERSION
+	UNDEFINE TXT_BIOS_VERSION
+ ENDM
+
+;=======================================
+
 ;=======================================
  MACRO _mCollectInfo_begin
   IF COLLECT_INFO