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From: akcs.xymox@hpcvbbs.UUCP (Kelvin Chang)
Newsgroups: comp.sys.handhelds
Subject: Re: Protect for HP48 (attn: Bill Wickes)
Message-ID: <2800f701:2013.3comp.sys.handhelds;1@hpcvbbs.UUCP>
Date: 8 Apr 91 23:40:06 GMT
References: <27b7409e:2013comp.sys.handhelds@hpcvbbs.UUCP> <27fd1a6f:2013.2comp
Lines: 17

If you want a way to disable the on function on a program, maybe you
could take a look at the 'brix' program I uploaded in 'user.programs'.
Once you start playing it, the only way to get out of it is to push on-c.
And it's impossible (for me)
to edit the program as I don't know how to edit a program with a null
character in it.  If you can figure it out, please leave a note telling
me how you did it and how the program works.  I would really like to
program more complex programs on the 48sx.

Thanks,

Kelvin
P.S.  How do you integrate the #15777h SYSEVAL null character in a
program so that it can't be edited?  It's a great way to hide files, but
I found that you can't hide the home directory variables... if you push
'home' the variables will be displayed.  So I assume it is only good for
hiding variables in subdirectories?