Splitting Images: Routine at 58943

58943: Remove Player Cursor Attributes

Used by the routines at Controls_CheckRight, Controls_CheckLeft, Remove_PlayerCursor and 63581.
Less "remove" and more "replace"; this routine erases the players cursor attributes, but it doesn't leave a hole - it replaces the attributes with the values they were prior to it being originally drawn. This is the 4x4 block of attributes which were behind the cursor before it was initially painted.
Remove_PlayerCursorAttributes	58943	LD HL,58832	Load HL with SavedAttributesBlock.
This is a pointer to the starting attribute buffer location of the players cursor.
	58946	LD DE,(58850)	Load DE with *Cursor_AttributePointer.
The cursor block is 4x4 (4 rows of 4 bytes).
	58950	LD B,4	Set a counter in B for 4 rows.
Remove_PlayerCursorAttributes_Loop	58952	PUSH BC	Stash the row counter on the stack.
	58953	LD BC,4	Copy 0004 bytes from the stored attributes to the attribute buffer.
	58956	LDIR
One full row is 32 bytes, so this is 4 bytes less than one row. Hence this moves down one row, but back to the start of the line.
	58958	EX DE,HL	Add 0028 to the attribute buffer position.
	58959	LD BC,28
	58962	ADD HL,BC
	58963	EX DE,HL
	58964	POP BC	Restore the row counter from the stack.
	58965	DJNZ Remove_PlayerCursorAttributes_Loop	Decrease the row counter by one and loop back to Remove_PlayerCursorAttributes_Loop until all the rows have been updated.
	58967	RET	Return.