← 9829 Clear the screen bitmap to zero Map 9844 → Print a font string to the screen
9837: Fill the attribute file with the color in A
Fills every attribute cell with the byte in A.
Input
A the attribute byte written to every cell
fill_attrs 9837 LD HL,ATTR_BASE Start of the attribute file.
983A LD DE,ATTR_BASE+$1
983D LD BC,$02FF One less than the full cell count: the seed fills the first cell.
9840 LD (HL),A Seed the first cell with A.
9841 LDIR Propagate A through every cell.
9843 RET
← 9829 Clear the screen bitmap to zero Map 9844 → Print a font string to the screen
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