Routines
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E550: Divide by eight with rounding
This divides (C,A) by 8, with rounding to nearest, returning the result in A.
Used by the routines at calc_interior_item_iso_pos, purge_invisible_characters, setup_vischar_plotting and pos_to_tinypos.
Input
A Low.
C High.
Output
A Result.
divide_by_8_with_rounding E550 ADD A,$04 Add 4 to AC
E552 JR NC,divide_by_8
E554 INC C
FALL THROUGH into divide_by_8.
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