exe.def

一个dos操作系统DRDOS的源码

;    File              : $EXE.DEF$
;
;    Description       :
;
;    Original Author   : DIGITAL RESEARCH
;
;    Last Edited By    : $CALDERA$
;
;-----------------------------------------------------------------------;
;    Copyright Work of Caldera, Inc. All Rights Reserved.
;      
;    THIS WORK IS A COPYRIGHT WORK AND CONTAINS CONFIDENTIAL,
;    PROPRIETARY AND TRADE SECRET INFORMATION OF CALDERA, INC.
;    ACCESS TO THIS WORK IS RESTRICTED TO (I) CALDERA, INC. EMPLOYEES
;    WHO HAVE A NEED TO KNOW TO PERFORM TASKS WITHIN THE SCOPE OF
;    THEIR ASSIGNMENTS AND (II) ENTITIES OTHER THAN CALDERA, INC. WHO
;    HAVE ACCEPTED THE CALDERA OPENDOS SOURCE LICENSE OR OTHER CALDERA LICENSE
;    AGREEMENTS. EXCEPT UNDER THE EXPRESS TERMS OF THE CALDERA LICENSE
;    AGREEMENT NO PART OF THIS WORK MAY BE USED, PRACTICED, PERFORMED,
;    COPIED, DISTRIBUTED, REVISED, MODIFIED, TRANSLATED, ABRIDGED,
;    CONDENSED, EXPANDED, COLLECTED, COMPILED, LINKED, RECAST,
;    TRANSFORMED OR ADAPTED WITHOUT THE PRIOR WRITTEN CONSENT OF
;    CALDERA, INC. ANY USE OR EXPLOITATION OF THIS WORK WITHOUT
;    AUTHORIZATION COULD SUBJECT THE PERPETRATOR TO CRIMINAL AND
;    CIVIL LIABILITY.
;-----------------------------------------------------------------------;
;
;    *** Current Edit History ***
;    *** End of Current Edit History ***
;
;    $Log$
;
;    ENDLOG
;
;   This file defines the DOS .EXE file Header


EXE_SIGNATURE	equ	word ptr 0		; 0000 Valid EXE contains 'MZ'
EXE_FINAL	equ	word ptr EXE_SIGNATURE+2; 0002 Image Length MOD 512
EXE_SIZE	equ	word ptr EXE_FINAL+2	; 0004 Image Length DIV 512
EXE_RELCNT	equ	word ptr EXE_SIZE+2	; 0006 No. of Relocation Items
EXE_HEADER	equ	word ptr EXE_RELCNT+2	; 0008 Header Size in paragraphs
EXE_MINPARA	equ	word ptr EXE_HEADER+2	; 000A Minimum No extra paragraphs
EXE_MAXPARA	equ	word ptr EXE_MINPARA+2	; 000C Maximum No of extra paragraphs
EXE_SS		equ	word ptr EXE_MAXPARA+2	; 000E Displacment of Stack Segment
EXE_SP		equ	word ptr EXE_SS+2	; 0010 Initial SP
EXE_CHECKSUM	equ	word ptr EXE_SP+2	; 0012 Negative CheckSum
EXE_IP		equ	word ptr EXE_CHECKSUM+2	; 0014 Initial IP
EXE_CS		equ	word ptr EXE_IP+2	; 0016 Code Segment displacement
EXE_RELOFF	equ	word ptr EXE_CS+2	; 0018 Byte Offset of First REL item
EXE_OVERLAY	equ	word ptr EXE_RELOFF+2	; 001A Overlay Number (0 == Resident)
EXE_LENGTH	equ	001Ch