Routines
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41232: Draw Attributes Moving Down-Left
The attribute routine for an entity which has moved down and left. Each row of cells under the entity is set to the attribute of the entity, and the cell to the right of it is put back to the attribute of the room. So is the row above the entity, with one more cell to the right.
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
AttrDrawMovingDownLeft 41232 POP HL Restore the attribute address from the stack.
AttrDrawMovingDownLeft_Row 41233 PUSH BC Stash the width and the number of rows on the stack.
41234 PUSH HL Stash the attribute address on the stack.
AttrDrawMovingDownLeft_Cell 41235 LD (HL),D Write the attribute of the entity to the cell.
41236 INC L Move to the next cell.
41237 DJNZ AttrDrawMovingDownLeft_Cell Decrease the width by one and loop back to AttrDrawMovingDownLeft_Cell until the row is done.
41239 LD (HL),E Write the attribute of the room to the cell on the right.
41240 POP HL Restore the attribute address from the stack.
41241 LD BC,32 BC=0032.
41244 AND A Move up a row.
41245 SBC HL,BC
41247 POP BC Restore the width and the number of rows from the stack.
41248 DEC C Decrease the number of rows by one and loop back to AttrDrawMovingDownLeft_Row until all of the rows have been set.
41249 JR NZ,AttrDrawMovingDownLeft_Row
41251 INC B Add one more cell to the width.
41252 JP AttrDrawMovingDown_Above Jump to AttrDrawMovingDown_Above to put the row above back to the attribute of the room.
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