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Shadow Party 2025 by Flush
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popularity : 49% |
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alltime top: #27232 |
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added on the 2025-05-27 08:47:01 by hitchhikr  |
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What's the secret to getting 4096 colours on ST (not STe)? 50Hz colour flashing?
added on the 2025-05-27 10:55:03 by xeron 
This one really threw the projector off during the compo. I'm curious about the details of this 4096 color mode. I don't think I've seen anything like that on ST before.
This demo used a version of the 4096 colours technique.
https://www.pouet.net/prod.php?which=59066
https://www.pouet.net/prod.php?which=59066
What Xenon asked.
And - Really 4096? Or close to?
And - Really 4096? Or close to?
The 4096 colours code comes from an updated, not yet released version of my MPP library: https://github.com/zerkman/mpp
4096 colours is only on STE. On ST it uses colour flashing indeed, to simulate intermediary RGB levels. It is more exactly 3375 colours (15*15*15) in that case, since we get 7 intermediary brightness levels between the 8 base levels.
4096 colours is only on STE. On ST it uses colour flashing indeed, to simulate intermediary RGB levels. It is more exactly 3375 colours (15*15*15) in that case, since we get 7 intermediary brightness levels between the 8 base levels.
Quote:
I'm curious about the details of this 4096 color mode. I don't think I've seen anything like that on ST before.
As mentioned above it flicker colours, but the amount of colours on screen is where the real work is. It's an extension of the Spectrum 512 kind of display (made in 1987). It changes the entire palette three times per scanline to achive 48 unique colours every line. Spec 512 did this in 320*199 while Zerkman is doing it in full overscan.
What is really new in this demo is using every scanline available (276) for the image. No syncline at the top (I assume e-clock sync?) and double lower border removal. Hats of to Zerkman for that :)
Cool tech.
Funnily I thought something like had been done before, but certainly not with an e-clock sync.
Also adding text, or whatever, on top of such images at runtime is another level of gymnastics
Funnily I thought something like had been done before, but certainly not with an e-clock sync.
Also adding text, or whatever, on top of such images at runtime is another level of gymnastics
Photos in this invitro sure look a lot better than the ones in mine...
Excellent music! Nice graphics! Techy! Zerkman involved! Definetly a thumbs up!
Excellent music! Nice graphics! Techy! Zerkman involved! Definetly a thumbs up!
Amazing piece of tech, congrats folks !
Quote:
As mentioned above it flicker colours, but the amount of colours on screen is where the real work is. It's an extension of the Spectrum 512 kind of display (made in 1987). It changes the entire palette three times per scanline to achive 48 unique colours every line. Spec 512 did this in 320*199 while Zerkman is doing it in full overscan.
What is really new in this demo is using every scanline available (276) for the image. No syncline at the top (I assume e-clock sync?) and double lower border removal. Hats of to Zerkman for that :)
Oh! Cool!
@evil: due to ST/STE compatibility fixes, the number of colour changes per scanline has been reduced to 47 (and 46 on scanlines with the additional NTSC/PAL switches).
Congratz. Atari rulez. Zerkman président !
Great tech!
These color-rich pics on ST are amazing.
It's very nice to see Zerkman back to produce on Atari ST, many thanks :)
Impressive tech and cool invite! See you at the party ;)
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