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Power Programmierung
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Power-Programmierung (Tewi)(1994).iso
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assemblr
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library
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coreaids
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open.asm
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Assembly Source File
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1987-06-25
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967b
|
40 lines
; DESC: Opens a file V1.00
; IN: *{SEG_VAL} segment and
; *{OFFSET} offset of filename as ASCIIZ strng
; *{ACC_CODE} access code of file (0:read,1:write,2:read write)
; OUT: *{HANDLE} handle of file
; SAMPLE: Callm OPEN,<SEG_VAL,OFFSET,ACC_CODE>,<HANDLE>
#####################################################################
Extrn PUSHALL:Near
Extrn POPALL:Near
Extrn ERRORMSG:Near
OPENC Segment
Assume CS:OPENC
Public OPEN
;notice.
DB 'OPEN - V1.00, Copyright 1987, CoreTechs ',0DH,0AH
OPEN Proc Near ;opens a file.
Call PUSHALL
Pop AX ;get the access code.
Pop DX ;get the filename offset.
Pop DS ;get the segment offset.
Mov AH,3DH ;open a file.
Int 21H
Jc ERROR ;if an error report it.
Push AX ;if no error return handle.
Call POPALL
Ret
ERROR: Push AX ;report error and abort.
Call ERRORMSG
OPEN Endp
OPENC Ends
End