datavers.asm

[随书类]Dos6.0源代码

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COMMENT #

	DATAVERS.ASM

	Copyright (c) 1991 - Microsoft Corp.
	All rights reserved.
	Microsoft Confidential

	johnhe - 03/03/89

END COMMENT #

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include BIOS_IO.INC
include	MODEL.INC


.CODE

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;
; Returns the DOS Data version from DOSDATA:04h
;
; int	GetDosDataVersion( void );
;
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GetDosDataVersion PROC USES ES

	mov	AH,34h			; DOS get critical flag address
	int	21h
	mov	BX,4			; Put address of DATA version in BX
	mov	AL,ES:[BX]		; Get DATA version byte
	cbw				; Convert AL to an integer
	ret

GetDosDataVersion ENDP	

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	END

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