Used by the routine at PLAYER_LEGS.

Two ways of steering. Rotational control -- the keyboard's, and every joystick's as the menu leaves them -- turns a quarter at a time on the two turn controls: bit 0 of C turns left, bit 1 right. Directional control treats the controls as four points of the compass instead: pushing one turns the player towards it and, once he faces it, walks him that way. It needs a joystick method and bit 3 of CONTROL, which no menu choice sets (MENU), so the game as sold never uses it.

Facings, as GET_SPRITE_DIR gives them: 0 is towards lower U (up and left on the screen), 1 higher U (down and right), 2 higher V (up and right), 3 lower V (down and left). A facing is stored as two bits -- bit 2 of the graphic and bit 6 of the flags, the mirror bit -- and a quarter turn always toggles the mirror bit and, half the time, the graphic's bit 2 as well. A left turn goes 0, 3, 1, 2 and round; a right turn the other way. The body's graphic is set to the legs' plus 8 at once, so the two turn in the same turn.

Directional control reads up (bit 2) unless left is also held, then right, down (bit 4), left, and goes the short way round, or two turns for an about-face. Up is the walk bit itself, so pushing up walks even while turning; and down is bit 4, which READ_CONTROLS sets only from the pick-up keys -- every joystick's down is jump, bit 3 -- so a joystick alone can never face 3. This is Knight Lore's code, where the stick's down was bit 4.