RE: VIC-II and sprites with X >= 356

From: Laze Ristoski (
Date: 2005-02-18 10:38:27

I thought it was always $ff for the top line.
As new data hasn't been read yet, VIC will
display what's remained in the shift register.
So if it wasn't the top line, this would quite
likely be 0. I might guess where $ff comes from.
In the previous line (and those before as well)
VIC will get to the cycle where it reads the sprite
data. However, the DMA is switched off (i.e. the
lines are disconnected) so VIC happily reads $ff.

But I didn't know it also reads from $3fff and
that it depends on the active sprites. This is
quite interesting.


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