Splitting Images: Routine at 58442

58442: Remove Player Cursor Attributes

Used by the routines at 57069, Remove_PlayerCursor and 62586.
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	58442	LD HL,58331	Load HL with SavedAttributesBlock.
This is a pointer to the starting attribute buffer location of the players cursor.
	58445	LD DE,(58349)	Load DE with *Cursor_AttributePointer.
The cursor block is 4x4 (4 rows of 4 bytes).
	58449	LD B,4	Set a counter in B for 4 rows.
Remove_PlayerCursorAttributes_Loop	58451	PUSH BC	Stash the row counter on the stack.
	58452	LD BC,4	Copy 0004 bytes from the stored attributes to the attribute buffer.
	58455	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.
	58457	EX DE,HL	Add 0028 to the attribute buffer position.
	58458	LD BC,28
	58461	ADD HL,BC
	58462	EX DE,HL
	58463	POP BC	Restore the row counter from the stack.
	58464	DJNZ Remove_PlayerCursorAttributes_Loop	Decrease the row counter by one and loop back to Remove_PlayerCursorAttributes_Loop until all the rows have been updated.
	58466	RET	Return.