Sprite port-mirror Attribute 2 Register

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Number $37
Readable No
Writable Yes
Short Description Nextreg port-mirror to write directly into "byte 3" of Sprite Attribute Upload ($xx57 / 87).

Byte 3 is bitmapped:

Bit Description
4-7 Palette offset, added to each palette index from pattern before drawing
3 Enable X mirror
2 Enable Y mirror
1 Enable rotation
0 anchor sprite: MSB of X coordinate

relative sprite: enable relative Palette offset (1 = the anchor Palette offset is added, 0 = independent Palette offset)