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Old 02 June 2019, 18:04   #3
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Join Date: Jun 2017
Location: Paris
Posts: 51
Originally Posted by Toni Wilen View Post
I didn't test but most logical reason would be blitter nasty bit being cleared first and set later.

Doesn't sound like the explanation. This bit is cleared at the beginning:

move.w #$07FF,DMACON(a5)

and later not set:

move.w #$83C0,DMACON(a5) ;DMAEN=1, BPLEN=1, COPEN=1, BLTEN=1

Notice that the problem occurs only when drawing lines with the Blitter.
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