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spider-j
Registered: Oct 2004
Posts: 498 |
VIC idle graphics / ghostbytes in sideborder
Hey guys,
can anyone tell me what types of "idle graphics" / "ghostbytes" there are?
I know about VICBANK + $3FFF, but I vaguely remember there are more.
My situation:
Open Sideborder, sprites 4, 5, 6, 7 are on. Sprite 7 is at x position $170 and in the open sideborder one line before the actual sprite I have 3 "ghostbytes" visible at the same x coordinates. One (the second of them) seems to be $3FFF. At least if I set $3FFF to zero, the second one disappears. What about the other ones?
Cheers,
spider. |
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Copyfault
Registered: Dec 2001
Posts: 478 |
Hi spider,
I sutmbled upon this a while ago which led to the discussion Sprite data fetch in sideborder.
I think this will explain the sprite data sources;) If not, feel free to ask again and point me to the open questions!
Cheers
Copyfault |
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tlr
Registered: Sep 2003
Posts: 1790 |
Those other bytes are from the internal VIC-II bus. Basically it's whatever is written to or read from the VIC-II registers in that cycle. It defaults to FF due to the NMOS pull ups on the bus.
Previously discussed here: Sprite data fetch in sideborder |
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spider-j
Registered: Oct 2004
Posts: 498 |
Thank you, guys! I knew I've read something about that somewhere before - was just too stupid / lazy to find it ;-) |
