BINTRIS C64: Bad lines and flexible line distance (series part 5)

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(Looking for the BINTRIS C64 disk image? Find it here .) Introduction This post discusses how BINTRIS uses YSCROLL manipulation to implement bad line suppression and full-screen vertical scrolling (flexible line distance, or FLD). Here are the effects in action: Vertical scrolling. BINTRIS logo warp effect. Note: all timing values in this post are for specific to PAL-B C64 models. Bad Lines To…

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