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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: Oldsmobile_Mike on March 01, 2018, 05:39:54 PM
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I take no credit for this video, just saw it posted over on one of the other Amiga forums and wanted to share a link here. It's pretty neat! :)
https://www.youtube.com/watch?v=KwxmgTPcRGM
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Funny thing is the guy didn't actually try the A2024 modes at all, he just ran regular PAL modes (the A2024 has a built-in framebuffer that reassembles the interlaced input and displays it as progressive scan).
Its big killer feature, though, was that it supported other resolutions like 1024x800 and 1024x1024 by using a DCTV/HAM-E/Graffiti-style magic cookie to cause it to interpret 4-bit pixels differently. The difference is that while those other adapters combined two 4-bit pixels into one higher-color 8-bit pixel to give you more colors at lower resolution, the A2024 takes a 4-bit RGBI pixel and converts it into two 2-bit greyscale pixels to give you fewer colors at higher resolution (and does it in an odd way at that, populating its framebuffer in a way that's not linear to the source signal -- it actually samples multiple frames and combines them into a 10Hz or 15Hz effective refresh rate!)
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Total waste unbox that thing just to see it operate as a grey-scale flicker-fixer.
Probably never loaded the monitor files because the A2024 specific modes were not even listed...
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AFAIR the A2024-specific modes only worked under a custom version of 1.3, unless I'm remembering incorrectly?
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AFAIR the A2024-specific modes only worked under a custom version of 1.3, unless I'm remembering incorrectly?
It was first made working with a custom 1.3, that is right, but all kickstart releases from v37 on shipped a special monitor driver for it, so it could be used by all later versions as well.
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there is a comment on the video pointing out he didn't try out the hires modes and he said he would.