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Old 27 January 2012, 19:13   #40
Mrs Beanbag
Glastonbridge Software
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Join Date: Jan 2012
Location: Edinburgh/Scotland
Posts: 2,202
no only 2 sources, one in the same place as the destination as usual and one 4/2/1 pixels higher. The mask is put straight into BLTBDAT so no DMA needed.

The FIRST blit is slightly different however because it doesn't need to combine with the background at all. That uses two sources pointing into the original graphics, one 8 pixels higher than the other.
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