Audio-in? (Datassette)
Hello!
I was just thinking about the C64 and how cool it was that you could store digital data on standard audio cassettes. I wonder if it would be possible to do that with the hydra using a standard cassette-recorder.
The Hydra has a sound output, so you could at least create a WOM (Write Only Memory). But how to read the data back in? Could you somehow read from an "output"? Like, writing on audio-out, reading on video-out? Or do I have to use the blank experimenter card for this? How hard would it be?
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Unterwelt (My first game for the HYDRA):
http://forums.parallax.com/showthread.php?p=696204
Hydra in a LEGO NES:
http://forums.parallax.com/showthread.php?p=654788
I was just thinking about the C64 and how cool it was that you could store digital data on standard audio cassettes. I wonder if it would be possible to do that with the hydra using a standard cassette-recorder.
The Hydra has a sound output, so you could at least create a WOM (Write Only Memory). But how to read the data back in? Could you somehow read from an "output"? Like, writing on audio-out, reading on video-out? Or do I have to use the blank experimenter card for this? How hard would it be?
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Unterwelt (My first game for the HYDRA):
http://forums.parallax.com/showthread.php?p=696204
Hydra in a LEGO NES:
http://forums.parallax.com/showthread.php?p=654788
Comments
Looks like I did not phrase my question clearly... :-/
The process of mapping binary data to sound is clear to me. I'm really asking about the very basic thing of getting the sound from a cassette into my Hydra.
I just checked the book and it looks that there is no easy way of getting the sound into the Hydra. So I guess I'll have to use the experimenter card for that. Is that feasible? (I have no experience in soldering)
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Unterwelt (My first game for the HYDRA):
http://forums.parallax.com/showthread.php?p=696204
Hydra in a LEGO NES:
http://forums.parallax.com/showthread.php?p=654788
It's a shame that he didn't leave source code before he went onto other things...
I've been working on a reverse engineering of that project for .TAP files, but
have hit a few walls I haven't gotten over yet...
OBC
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Have a look at the schematics for a VIC-20, C64, or TI-99/4a. The cassette circuit is extremely simple, with a few biased transistors and filter capacitors. The signal itself is technically digital.