Re: Many questions about cassette tapes

[Steve Nickolas <lyricalnanoha@usotsuki.hoshinet.org>]

On Fri, 12 Aug 2011, Eric Rucker wrote:

> On Thursday, August 11, 2011 8:37:51 PM UTC-4, D Finnigan wrote:
> > Not sure what you're asking here. The Apple either loads data into RAM from
> > a tape, or dumps a range of its memory back to tape.
>
> Interestingly, there are ways to do more stupid computer tricks, just by 
> loading into the right range of memory, and those tricks were used for 
> various things, ranging from executing the program without having to do 
> xxxxG in the monitor, all the way up to primitive copy protection 
> schemes: http://www.fadden.com/techmisc/cassette-protect.htm

I created the tape image for INTLODR under Linux.  With direct control of 
the file I used one of these dirty tricks: the "protect" bit is set, so it 
autoruns. (It's a binary program in a BASIC wrapper.  This is rare on the 
Apple but common as hell on the C64, which is what the compression tool I 
used was intended for.)

-uso.