Routines
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41101: Draw Attributes Moving Right
The attribute routine for an entity which has moved right. Each row of cells under the entity is set to the attribute of the entity, and the cell just to the left of it (which the entity has left) is put back to the attribute of the room.
Input
B The width of the sprite in cells
C The number of rows of cells
D The attribute of the entity
E The attribute of the room
AttrDrawMovingRight 41101 POP HL Restore the attribute address from the stack.
This entry point is used by the routine at AttrDrawMovingUpRight.
AttrDrawMovingRight_Row 41102 PUSH BC Stash the width and the number of rows on the stack.
41103 PUSH HL Stash the attribute address on the stack.
41104 DEC L Move to the cell on the left.
41105 LD (HL),E Write the attribute of the room to the cell.
41106 INC L Move back to the first cell.
AttrDrawMovingRight_Cell 41107 LD (HL),D Write the attribute of the entity to the cell.
41108 INC L Move to the next cell.
41109 DJNZ AttrDrawMovingRight_Cell Decrease the width by one and loop back to AttrDrawMovingRight_Cell until the row is done.
41111 POP HL Restore the attribute address from the stack.
41112 LD BC,32 BC=0032.
41115 AND A Move up a row.
41116 SBC HL,BC
41118 POP BC Restore the width and the number of rows from the stack.
41119 DEC C Decrease the number of rows by one and loop back to AttrDrawMovingRight_Row until all of the rows have been set.
41120 JR NZ,AttrDrawMovingRight_Row
41122 RET Return.
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