Path: utzoo!mnetor!uunet!husc6!mit-eddie!ll-xn!ames!ptsfa!ski!dr
From: dr@ski.UUCP (David Robins)
Newsgroups: comp.sys.apple
Subject: Re: writing ^D in basic
Message-ID: <2416@ski.UUCP>
Date: 6 Jan 88 19:07:55 GMT
Reply-To: dr@unix.UUCP (David Robins)
Organization: Smith-Kettlewell Institute, S.F., CA.
Lines: 29

In article <> TMPLee@DOCKMASTER.ARPA writes:
>Does anyone know if there is any way in basic (applesoft) under ProDos
>to get the D$ (chr$(4) or chr$(132)) character written out to a file?  I
>don't have a ProDos basic manual so don't know if there is any trick:
>neither doubling it nor following it with a carriage return, either of
>which seems a reasonable escape sequence, works.  .

I have seen CTRL-D inserted in REM statements in Applesoft listings to
keep people from LISTing the sourcecode.  RUNning ignores the REM, but
on a LIST, a CRTL-D can then be followed by an FP or similar statement
to kill the program.

They way they got the CRTL-D in the listing was to lwave space in the
REM statement using a false character, like an asterick.  After
wrinting the file to disk, they use a track-sector editor, like COPY
II-PLUS to find the false character and replace it with the CTRL-D
character.  I don't recall if they used hex $04 or hex $84.
-- 
					-dave

====================================================================
David Robins, M.D.  (ophthalmologist / electronics engineer)
Smith-Kettlewell Eye Research Foundation
(previously known as: Smith-Kettlewell Institute of Visual Sciences)
2232 Webster St; San Francisco CA 94115
415/561-1705 (voice)
			{ihnp4,qantel,dual}!ptsfa!ski!dr

The opinions expressed herein do not reflect the opinion of the Institute!