Description: Apple Writer II: DOS Version--Recovering "Lost" Text Files
Header: Apple Writer II: DOS Version--Recovering "Lost" Text Files

 At times you run the risk of saving a short text file over a text file of
 greater length.  You might, for instance, save the empty Apple Writer editor
 workspace with the same name of a valuable document.  This prevents the system
 accessing the original contents of the file.  While the data is still on the
 diskette, you have made it unaccessable to the system.  This program accesses
 the data so that the system may recover your original file.  This program has
 been tested on Apple Writer II and Apple Writer IIe files.  It works with
 standard DOS Text files, signified by a T in the left margin of a catalog
 listing.  This program does not operate with the ProDOS version of
 Apple Writer.

 10  TEXT : NORMAL : HOME
 20  INPUT "ENTER THE FILE NAME TO BE READ ";F$
 30  INPUT "FIRST BYTE TO READ ";C
 40  ONERR GOTO 200
 50  D$ = CHR$(4)
 60  PRINT D$;"OPEN "F$",L1"
 70  PRINT D$;"OPEN NEW";F$
 80  B$ = ""
 90  PRINT D$;"READ "F$",R";C
 100  GET A$
 110  C = C + 1
 120  IF (ASC (A$) = 13) GOTO 170
 130  B$ = B$ + A$
 140  PRINT
 150  IF (LEN (B$) > 254) GOTO 170
 160  GOTO 90
 170  PRINT : PRINT D$;"WRITE NEW";F$
 180  PRINT B$
 190  GOTO 80 200  PRINT : PRINT D$;"CLOSE ";F$
 210  PRINT D$;"CLOSE NEW";F$
 220  END

 1.  Type in the program and save it on your DOS disk.  Run it.

 2.  After the program requests the name of the file that is to be
    recovered, type in the name giving slot and drive specifications in
    necessary--e.g., MYFILE, S6, D2.

 3.  Next the program prompts you for the first byte that you want to read
    from the file.  You type in a number which should be:

    a.  an integer between 1 and 32768

    b.  the size, in bytes, of the file that was accidentally saved plus 1.

    To find the size of this accidentally saved file, [L]oad it under
    Apple Writer.  The size of the file is displayed on the data line after
    the length entry Len:.  Add one to this count and type in the result.

 4.  Once you have typed in your information, give the program time to run and
    write the entire file.  To read part of the file and the write the new
    file, the program may go back to the drive several times, so please be
    patient.  The cursor will come back to the screen when the program is
    finished.
 Apple Technical Communications


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