Travel With Trashman: Routine at 81B3

81B3: Flash Location Map Points

Used by the routine at 8055.
Starting with the first location, London.
FlashLocationMapPoints	81B3	LD IX,$8E82	IX=London_Location.
	81B7	LD B,$0E	Set a counter in B for the total number of locations (0E).
FlashLocationMapPoints_Loop	81B9	PUSH BC	Stash the locations count on the stack.
	81BA	LD L,(IX+$02)	Load the map co-ordinates for the current location into HL.
	81BD	LD H,(IX+$03)	Load the map co-ordinates for the current location into HL.
	81C0	CALL ToggleMapPoint	Call ToggleMapPoint.
	81C3	LD DE,$0016	Add 0016 to IX which is a safe place to land to find the next location.
	81C6	ADD IX,DE
All locations end with the string for the location name, so now move through the string to find the terminating bit. This is necessary as the location names have varying lengths.
CheckTerminator_Loop	81C8	BIT 7,(IX+$00)	Test bit 7 of *IX+00.
	81CC	INC IX	Increment IX by one.
	81CE	JR Z,CheckTerminator_Loop	Keep jumping back to CheckTerminator_Loop until the terminating bit 7 is found.
	81D0	POP BC	Restore the locations count from the stack.
	81D1	DJNZ FlashLocationMapPoints_Loop	Decrease the locations count by one and loop back to FlashLocationMapPoints_Loop until locations have been processed.
	81D3	RET	Return.