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Re: disk images



:At 04:14 PM 4/2/96 -0500, Matt `The Man` Galgoci wrote:
:Hi-
:	I realize that in order to use a disk image as a hfv, the first 
:84 bytes must be stripped off the beginning and the image renamed using 
:*.hfv convention.  Right now, with DOS, I'm not aware of any methods 
:that I can use to do this.  (Yes, I do know how to rename files :-))
:Could a Hex editor be used? How about any of the Norton Utilities?
:- 
:                     North Carolina State University
:                            Matthew John Galgoci
:                          mjgalgoc@unity.ncsu.edu
::>
:
My question is, how do I get the file to copy back to the DOS area so I CAN 
edit it after I un-hqx/sit/sea it?  If you have the actual image file in 
DOS, you should be able to strip the first 84 bits with the following BASIC 
code.  Note that it is written free-hand on line.  As always when mucking 
about with a file you want to keep, save it somewhere else before mucking 
about with it.

10  Open "filename.ext" for input as #1 
20  Open "newname.ext" for output as #2
30  x=1
40  while not eof(1)
50  a$=input$(1,1)
60  if x > 84 then print #2,a$
70  x=x+1
80  a$=""
90  wend

Line 10 opens the file to be stripped.  Note that filename.ext represents 
that file's FULL filename
Line 20 opens the file to write the stripped data to.  Again, the FULL filename
Line 30 sets a variable to count the characters
Line 40 sets up a loop that will repeat until the end of the file is reached.
Line 50 gets the next byte in the file
Line 60 discards the first 84 characters and copies the remainder to file 2
Line 70 counts the character position
Line 80 blanks the String variable (may not be necessary, just playing it safe
Line 90 loops back to the line 40 check.

Hope this helps.


John



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