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Assembly Source File  |  1988-08-11  |  532 b   |  16 lines
  1. fname   db      'C:\BACKUP\MYFILE.DAT',0
  2.         .
  3.         .
  4.         .
  5.         mov     dx,seg fname    ; DS:DX = address of filename
  6.         mov     ds,dx
  7.         mov     dx,offset fname
  8.         mov     cx,1            ; CX = attribute (read-only)
  9.         mov     al,1            ; AL = mode (0 = get, 1 = set)
  10.         mov     ah,43h          ; Function 43H = get/set attr
  11.         int     21h             ; transfer to MS-DOS
  12.         jc      error           ; jump if set attrib. failed
  13.         .
  14.         .
  15.         .
  16.