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Author Topic: TI84+ Generating Video!! -  (Read 386 times) Bookmark and Share
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Keoni29
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« on: 27 October, 2011, 11:11:00 »
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I really don't know if it's possible to generate a proper 1-bit video signal with a TI 84+, but I ran some tests and this is my best result:
<a href="http://www.youtube.com/watch?v=aJkRwNnNSR4" target="_blank">http://www.youtube.com/watch?v=aJkRwNnNSR4</a>
It alternates the linkports' state rapidly, but it's still too slow to generate a full white screen. I used AXE, but I think I have to use very optimized ASM to generate better video. Even then it won't be possible to do anything else but video playback.
« Last Edit: 27 October, 2011, 11:11:35 by Keoni29 » Logged

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« Reply #1 on: 27 October, 2011, 18:17:52 »
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haha, nice! Smiley
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« Reply #2 on: 27 October, 2011, 18:26:12 »
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Ben Ryves already did a proof-of-concept to that effect. Have fun---projects like this can really teach you a lot.
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« Reply #3 on: 27 October, 2011, 20:25:36 »
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Seems a cool project either. Did you use a FULL?
« Last Edit: 27 October, 2011, 20:25:50 by aeTIos » Logged
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« Reply #4 on: 27 October, 2011, 22:58:40 »
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Very nice!  Great work! Smiley
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« Reply #5 on: 27 October, 2011, 23:02:22 »
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Quote from: aeTIos on 27 October, 2011, 20:25:36
Seems a cool project either. Did you use a FULL?
Yes I did Sad Pure optimized asm might do the trick, cuz I got big white scanlines when I rubbed the wire over the battery
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« Reply #6 on: 27 October, 2011, 23:29:21 »
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Interesting. I'M curious how much this can be pushed in terms of graphical display. I remember seeing Benryves' project a few years ago and was amazed.

By the way does this work only on PAL TVs or will it work on NTSC ones too?
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« Reply #7 on: 28 October, 2011, 18:52:02 »
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It's actually easier on ntsc tv's cuz it's a lower frequency thats needded. I really dunno if it matters since modern tv's support both
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