Routines
Prev: DAB7 Up: Map Next: DB89
DB68: Turn the town round when its key is let go
Used by the routine at UPDATE_KNIGHT.
Z or SYMBOL SHIFT (bit 5 of the controls) turns the town round, to be seen from the other side, once a press: the key sets KEY_LATCH while held, and the turn happens when it is let go. The knight's facing gets a turn delay of two or three turns (bit 1 of +6), so a turn key held at the same time does not spin him while the view changes, and the panel's heading and compass are redrawn (PRINT_HEADING).
Input
E The controls
TURN_TOWN DB68 LD HL,KEY_LATCH Held: remember it and wait
DB6B BIT 5,E
DB6D JR Z,TURN_TOWN_0
DB6F LD (HL),$01
DB71 RET
TURN_TOWN_0 DB72 LD A,(HL) Not held: done unless it was last turn
DB73 AND A
DB74 RET Z
DB75 LD (HL),$00
DB77 LD HL,VIEW Turn the town round
DB7A LD A,(HL)
DB7B XOR $01
DB7D LD (HL),A
DB7E LD A,(KNIGHT_FACING) A turn delay for the knight
DB81 OR $02
DB83 LD (KNIGHT_FACING),A
DB86 JP PRINT_HEADING Redraw the heading and the compass
Prev: DAB7 Up: Map Next: DB89