Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!willett!ForthNet
From: ForthNet@willett.UUCP (ForthNet articles from GEnie)
Newsgroups: comp.lang.forth
Subject: Help requested (Forth System move)
Message-ID: <1389.UUL1.3#5129@willett.UUCP>
Date: 25 Jul 90 03:01:54 GMT
Organization: String, Scotch tape, and Paperclips.  (in Pgh, PA)
Lines: 27

Category 18,  Topic 29
Message 10        Mon Jul 23, 1990
W.FEDERICI [W.FEDERICI]      at 21:21 PDT
 
RE: removing drive designations from VIEW files in F83 . Elliot - . In F83,
each file you open actually creates a definition by that name in the
dictionary.  The body of this definition is a so-called "file control block"
or FCB, and the first byte of this FCB (i.e., the first byte of the body of
the dictionary entry) is the drive number on which the file is opened (1 for
A:, 2 for B:, etc.).  If you want MS-DOS to search the default drive, you
simply put a null in this byte before you open the file, BUT... DOS will fill
in the actual drive number when it opens the file. If you then do a "save-
system", this drive number gets saved, and the next time you use the
FCB...well, you can figure it out! . You can hunt through the dictionary and
change the offending bytes by hand, but the easy way to catch all the VIEW
files is to define a word that steps through the list VIEW-FILES and does the
dog-work for you: .
     : NOVIEWDRIVE ( -- )  VIEW-FILES 32 BOUNDS DO
          I @ ?DUP IF >BODY 0 SWAP C! THEN 2 +LOOP ; . Execute NOVIEWDRIVE
just before doing a save-system, and your new F83 will look for view files on
the default drive, whatever it may be.  If you like, you can forget
NOVIEWDRIVE right after you use it, since you probably won't need it very
often.  . - Wilson

-----
This message came from GEnie via willett through a semi-automated process.
Report problems to: uunet!willett!dwp or willett!dwp@hobbes.cert.sei.cmu.edu