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turbo55
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ofcreate.asm
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Assembly Source File
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1989-05-01
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1KB
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50 lines
; FILENAME: OFCREATE.ASM
; Copyright (c) 1988, 1989 by Borland International, Inc.
;
; Description: This module implements the routine FileCreate. FileCreate
; creates or truncates a file. The file is opened for writing.
;
; ASSEMBLY INSTRUCTIONS: To assemble this module use the following
; TASM command line.
;
; TASM ofcreate
include globals.inc
_TEXT segment
FileCreate proc
; Input
; bx - file record offset
; cx - buffer size
; dx - offset of filespec
; Output (of INT 21h, Function 3Ch)
; cf - set if error occurred
; ax - error code
; 3 - if path not found
; 4 - if no handle available
; 5 - if access denied
; Registers modified
; ax
mov WORD PTR [bx], 1 ;set status
mov [bx+2], cx ;save size
call FileAlloc ;allocate buffer
jc filcre1 ;jump if error
mov ah, 3ch ;function
sub cx, cx ;file attribute - 00h normal
int 21h ;execute
mov [bx+8], ax ;save handle
jnc filcre1
call FileFree ;deallocate buffer
stc
filcre1:
ret
FileCreate endp
_TEXT ends
end