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Old 23rd February 2015, 08:30   #13  |  Link
jmac698
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Join Date: Jan 2006
Posts: 1,867
Ha.. C64 had FLI mode before any of that
https://www.youtube.com/watch?v=QATUjaFYbJ4

It's a trick to trigger a DMA fetch of colour memories on every line, improving colour resolution 8x vertically. That's 2 free colours per 4x1, 1 per 160x1 (actually 148), and 1 per 4x8.

I found an algorithmic solution for perfect FLI colouring.

IFLI is flickering between different FLI screens, it's like a temportal dither, you can blend two colours this way to make 136 or so.

Also write an IFF encoder for my commercial product that saved samples from RAM.

Sliced HAM looks virtually perfect.
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