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B2C9: Copy task box attributes onto the screen buffer
Used by the routines at B203 and B2B6.
Input
HL Offset of first box
BC Offset of second box relative to first
DE Address of attribute buffer
A Attribute to copy
B2C9 ADD HL,DE Add first offset to attribute buffer
B2CA LD (HL),A Set the attribute
B2CB INC L Next character along
B2CC LD (HL),A Set the attribute
B2CD ADD HL,BC Add second offset to this
B2CE LD (HL),A Set the attribute
B2CF INC L Next character
B2D0 LD (HL),A Set the attribute
B2D1 RET All done
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