Sherlock: Routine at 55672

55672: Map The Cursor Keys

Used by the routine at ReadCommandLine_CommandLinePrints. Turns a cursor key into a compass letter: right (9) to E, left (8) to W, down (10) to S and up (91) to N.
MapCursorKeys	55672	CP 9	Jump ahead to MapCursorKeys_East if the key is cursor right (9).
	55674	JR Z,MapCursorKeys_East
	55676	CP 8	Jump ahead to MapCursorKeys_West if the key is cursor left (8).
	55678	JR Z,MapCursorKeys_West
	55680	CP 10	Jump ahead to MapCursorKeys_South if the key is cursor down (10).
	55682	JR Z,MapCursorKeys_South
	55684	CP 91	Return unless the key is cursor up (91).
	55686	RET NZ	Return unless the key is cursor up (91).
	55687	LD A,78	Take N for cursor up.
MapCursorKeys_0	55689	LD (HL),A	Store it at the line buffer and step to the next entry, then call Print_Character to print character.
	55690	INC HL
	55691	CALL Print_Character
	55694	DEC B	Count down the remaining steps.
	55695	LD A,13	Leave 13 as the result.
	55697	RET	Return.
Cursor down selects the letter S.
MapCursorKeys_South	55698	LD A,83	Take the direction letter S and go to MapCursorKeys_0 to store it in the line buffer and print it.
	55700	JR MapCursorKeys_0
Cursor right selects the letter E.
MapCursorKeys_East	55702	LD A,69	Take the direction letter E and go to MapCursorKeys_0 to store it in the line buffer and print it.
	55704	JR MapCursorKeys_0
Cursor left selects the letter W.
MapCursorKeys_West	55706	LD A,87	Take the direction letter W and go to MapCursorKeys_0 to store it in the line buffer and print it.
	55708	JR MapCursorKeys_0
View the equivalent code in; The Hobbit