Re: PC-to-Apple ][ File Transfer

[Andy McFadden <fadden@fadden.com>]

BLuRry <brendan.robert@gmail.com> wrote:
> And what's more, the emulated applewin sound doesn't quite match the
> real thing -- CiderPress can't recognize it even if I comb out only the
> 770hz, 1khz and 2khz audio bands.  So I'll have to abuse a real apple
> machine for this experiment I think.
> 
> Following what Andy McFadden wrote about the basics on cracking apple
> casette programs, is it exactly 1khz and 2khz tone or is that just a
> close approximation?  I think I can pretty easily generate very clean
> apple tape data after reading the book of McFadden. :-)

It's pretty close.  I've uploaded a sample file, recorded from an Apple II
cassette tape (the Apple "StarTrek" tape).  The tape contains two copies
of the program, the first of which reads cleanly in "zero crossing" mode.
It may shed some light on what a real Apple II is producing / expecting.

http://www.faddensoftware.com/apple-startrek.wav (note: 4.2MB)

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