From: Laze Ristoski (cybernator_at_mt.net.mk)
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. -- Laze Message was sent through the cbm-hackers mailing list
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