.setcpu "6502"

        .include "apple2.inc"
        .include "../inc/apple2.inc"
        .include "../inc/auxmem.inc"

        .include "../a2d.inc"
        .include "../desktop.inc" ; needed to redraw DeskTop icons after window mode

        .org $800

        jmp     copy2aux

        .res    36, 0

;;; ==================================================
;;; Copy the DA to AUX and invoke it

stash_stack:  .byte   0
.proc copy2aux
        tsx
        stx     stash_stack

        start := enter_da
        end := last

        sta     ALTZPOFF
        lda     ROMIN2
        lda     #<start
        sta     STARTLO
        lda     #>start
        sta     STARTHI
        lda     #<end
        sta     ENDLO
        lda     #>end
        sta     ENDHI
        lda     #<start
        sta     DESTINATIONLO
        lda     #>start
        sta     DESTINATIONHI
        sec                     ; main>aux
        jsr     AUXMOVE

        lda     #<enter_da
        sta     XFERSTARTLO
        lda     #>enter_da
        sta     XFERSTARTHI
        php
        pla
        ora     #$40            ; set overflow: use aux zp/stack
        pha
        plp
        sec                     ; control main>aux
        jmp     XFER
.endproc

;;; ==================================================
;;; Set up / tear down

.proc exit_da
        sta     ALTZPON
        lda     LCBANK1
        lda     LCBANK1
        ldx     stash_stack
        txs
        rts
.endproc

.proc enter_da
        sta     ALTZPON
        lda     LCBANK1
        lda     LCBANK1
        lda     #0
        sta     $08
        jmp     create_window
.endproc

        window_id := 51

;;; ==================================================
;;; Redraw the screen (all windows) after a drag

.proc redraw_screen

        dest := $20

        ;; copy following routine to $20 and call it
        ldx     #sizeof_routine
loop:   lda     routine,x
        sta     dest,x
        dex
        bpl     loop
        jsr     dest

        ;; now check the window pos
        lda     #window_id
        jsr     check_window_pos

        bit     window_pos_flag
        bmi     skip

        DESKTOP_CALL DESKTOP_REDRAW_ICONS

skip:   lda     #0
        sta     window_pos_flag
        rts

.proc routine
        sta     RAMRDOFF
        sta     RAMWRTOFF
        jsr     JUMP_TABLE_REDRAW_ALL
        sta     RAMRDON
        sta     RAMWRTON
        rts
.endproc
        sizeof_routine := * - routine
.endproc

;;; ==================================================
;;; ???

        screen_height := 192

window_pos_flag:
        .byte   0               ; ???

        ;; called with window_id in A
check_window_pos:
        sta     query_state_params_id
        lda     create_window_params_top ; is top on screen?
        cmp     #screen_height-1
        bcc     :+              ; yes
        lda     #$80            ; no, so ... ???
        sta     window_pos_flag
        rts

:       A2D_CALL A2D_QUERY_STATE, query_state_params
        A2D_CALL A2D_SET_STATE, set_state_params
        lda     query_state_params_id
        cmp     #window_id
        bne     :+
        jmp     draw_window

:       rts

;;; ==================================================
;;; Param Blocks

        ;; following memory space is re-used so x/y overlap
.proc drag_window_params
id      := * + 0
xcoord  := * + 1                ; x overlap
ycoord  := * + 3                ; y overlap
moved   := * + 5                ; ignored
.endproc

.proc map_coords_params
id      := * + 0
screenx := * + 1                ; x overlap
screeny := * + 3                ; y overlap
clientx := * + 5
clienty := * + 7
.endproc

.proc get_input_params
state:  .byte   0
key       := *
modifiers := *+1

xcoord    := *                  ; x overlap
ycoord    := *+2                ; y overlap
.endproc

.proc query_target_params
queryx  := *                    ; x overlap
queryy  := *+2                  ; y overlap
element := *+4
id      := *+5
.endproc

        .res    8, 0            ; storage for above

        .byte   0,0             ; ???

.proc close_click_params
clicked:.byte   0
.endproc

.proc query_state_params
id:     .byte   0
addr:   .addr   set_state_params
.endproc
query_state_params_id := query_state_params::id

        ;; Puzzle piece row/columns
        cw := 28
        c1 := 5
        c2 := c1 + cw
        c3 := c2 + cw
        c4 := c3 + cw
        rh := 16
        r1 := 3
        r2 := r1 + rh
        r3 := r2 + rh
        r4 := r3 + rh

space_positions:                 ; left, top for all 16 holes
        .word   c1,r1
        .word   c2,r1
        .word   c3,r1
        .word   c4,r1
        .word   c1,r2
        .word   c2,r2
        .word   c3,r2
        .word   c4,r2
        .word   c1,r3
        .word   c2,r3
        .word   c3,r3
        .word   c4,r3
        .word   c1,r4
        .word   c2,r4
        .word   c3,r4
        .word   c4,r4

.proc bitmap_table
        .addr   piece1, piece2, piece3, piece4
        .addr   piece5, piece6, piece7, piece8
        .addr   piece9, piece10, piece11, piece12
        .addr   piece13, piece14, piece15, piece16
.endproc

        ;; Current position table
position_table:
        .res    16, 0

.proc draw_bitmap_params
left:   .word   0
top:    .word   0
addr:   .addr   0
stride: .byte   4
        .byte   0               ; ???
hoff:   .word   0
voff:   .word   0
width:  .word   27
height: .word   15
.endproc

piece1:
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0000000),px(%0000000),px(%0000000),px(%0000000)
piece2:
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%0000000),px(%0011111),px(%1111110)
        .byte px(%0111000),px(%1010101),px(%0100001),px(%1111110)
        .byte px(%0000000),px(%0000000),px(%0000000),px(%0000000)
piece3:
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1110001),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%0010101),px(%0111110)
        .byte px(%0111111),px(%1111101),px(%0101010),px(%1011110)
        .byte px(%0111111),px(%1110010),px(%1010101),px(%0111110)
        .byte px(%0111111),px(%1100101),px(%0101010),px(%0111110)
        .byte px(%0111111),px(%0001010),px(%1010100),px(%1111110)
        .byte px(%0111110),px(%1010101),px(%0101001),px(%1111110)
        .byte px(%0111101),px(%0101010),px(%1000111),px(%1111110)
        .byte px(%0111010),px(%1010101),px(%0011111),px(%1111110)
        .byte px(%0110101),px(%0101000),px(%0111111),px(%1111110)
        .byte px(%0110010),px(%1010011),px(%1111111),px(%1111110)
        .byte px(%0110101),px(%0001111),px(%1111100),px(%0000000)
        .byte px(%0110000),px(%1111111),px(%1000010),px(%1010100)
        .byte px(%0000000),px(%0000000),px(%0000000),px(%0000000)
piece4:
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0000111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0101000),px(%0111111),px(%1111111),px(%1111110)
        .byte px(%0000000),px(%0000000),px(%0000000),px(%0000000)
piece5:
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111100)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111100)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1110100)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1101010)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1011110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%0111110)
        .byte px(%0111111),px(%1111111),px(%1111110),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111101),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111101),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111011),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1110111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1110111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1110110),px(%1101100)
        .byte px(%0111111),px(%1111111),px(%1101101),px(%1011010)
        .byte px(%0111111),px(%1111111),px(%1101011),px(%0110110)
        .byte px(%0000000),px(%0000000),px(%0000000),px(%0000000)
piece6:
        .byte px(%0101010),px(%1010101),px(%0101010),px(%1010100)
        .byte px(%0010101),px(%0101010),px(%1010101),px(%0101010)
        .byte px(%0101010),px(%1010101),px(%0101010),px(%1010100)
        .byte px(%0010101),px(%0101010),px(%1010101),px(%0101010)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0011011),px(%0110110),px(%1101101),px(%1011010)
        .byte px(%0110110),px(%1101101),px(%1011011),px(%0110110)
        .byte px(%0101101),px(%1011011),px(%0110110),px(%1101100)
        .byte px(%0000000),px(%0000000),px(%0000000),px(%0000000)
piece7:
        .byte px(%0101010),px(%1010101),px(%0101010),px(%1010100)
        .byte px(%0010101),px(%0101010),px(%1010101),px(%0101010)
        .byte px(%0101010),px(%1010101),px(%0101010),px(%1010100)
        .byte px(%0010101),px(%0101010),px(%1010101),px(%0101010)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0110110),px(%1101101),px(%1011011),px(%0110110)
        .byte px(%0101101),px(%1011011),px(%0110110),px(%1101100)
        .byte px(%0011011),px(%0110110),px(%1101101),px(%1011010)
        .byte px(%0000000),px(%0000000),px(%0000000),px(%0000000)
piece8:
        .byte px(%0101010),px(%1010001),px(%1111111),px(%1111110)
        .byte px(%0010101),px(%0101010),px(%0111111),px(%1111110)
        .byte px(%0101010),px(%1010101),px(%0001111),px(%1111110)
        .byte px(%0010101),px(%0101010),px(%1000111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%0011111),px(%1111110)
        .byte px(%0111111),px(%1111110),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111101),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111011),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1110111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1110111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1101111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1101111),px(%1111111),px(%1111110)
        .byte px(%0101101),px(%1001111),px(%1111111),px(%1111110)
        .byte px(%0011011),px(%0011111),px(%1111111),px(%1111110)
        .byte px(%0110110),px(%1011111),px(%1111111),px(%1111110)
        .byte px(%0000000),px(%0000000),px(%0000000),px(%0000000)
piece9:
        .byte px(%0111111),px(%1111111),px(%1110011),px(%0110110)
        .byte px(%0111111),px(%1111111),px(%1110110),px(%1101100)
        .byte px(%0111111),px(%1111111),px(%1110101),px(%1011010)
        .byte px(%0111111),px(%1111111),px(%1110011),px(%0110110)
        .byte px(%0111111),px(%1111111),px(%1111010),px(%1010100)
        .byte px(%0111111),px(%1111111),px(%1111010),px(%1010100)
        .byte px(%0111111),px(%1111111),px(%1111100),px(%1010100)
        .byte px(%0111111),px(%1111111),px(%1111110),px(%1010100)
        .byte px(%0111111),px(%1111111),px(%1111110),px(%1010100)
        .byte px(%0111111),px(%1111111),px(%1111110),px(%1010100)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%0010100)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1001100)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1100110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1110100)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111010)
        .byte px(%0000000),px(%0000000),px(%0000000),px(%0000000)
piece10:
        .byte px(%0101101),px(%1011011),px(%0110110),px(%1101100)
        .byte px(%0011011),px(%0110110),px(%1101101),px(%1011010)
        .byte px(%0110110),px(%1101101),px(%1011011),px(%0110110)
        .byte px(%0101101),px(%1011011),px(%0110110),px(%1101100)
        .byte px(%0101010),px(%1010101),px(%0101010),px(%1010100)
        .byte px(%0101010),px(%1010101),px(%0101010),px(%1010100)
        .byte px(%0101010),px(%1010101),px(%0101010),px(%1010100)
        .byte px(%0101010),px(%1010101),px(%0101010),px(%1010100)
        .byte px(%0101010),px(%1010101),px(%0101010),px(%1010100)
        .byte px(%0101010),px(%1010101),px(%0101010),px(%1010100)
        .byte px(%0101010),px(%1010101),px(%0101010),px(%1010100)
        .byte px(%0100110),px(%0110011),px(%0011001),px(%1001100)
        .byte px(%0110011),px(%0011001),px(%1001100),px(%1100110)
        .byte px(%0100110),px(%0110011),px(%0011001),px(%1001100)
        .byte px(%0110011),px(%0011001),px(%1001100),px(%1100110)
        .byte px(%0000000),px(%0000000),px(%0000000),px(%0000000)
piece11:
        .byte px(%0011011),px(%0110110),px(%1101101),px(%1011010)
        .byte px(%0110110),px(%1101101),px(%1011011),px(%0110110)
        .byte px(%0101101),px(%1011011),px(%0110110),px(%1101100)
        .byte px(%0011011),px(%0110110),px(%1101101),px(%1011010)
        .byte px(%0101010),px(%1010101),px(%0101010),px(%1010100)
        .byte px(%0101010),px(%1010101),px(%0101010),px(%1010100)
        .byte px(%0101010),px(%1010101),px(%0101010),px(%1010100)
        .byte px(%0101010),px(%1010101),px(%0101010),px(%1010100)
        .byte px(%0101010),px(%1010101),px(%0101010),px(%1010100)
        .byte px(%0101010),px(%1010101),px(%0101010),px(%1010100)
        .byte px(%0101010),px(%1010101),px(%0101010),px(%1010100)
        .byte px(%0100110),px(%0110011),px(%0011001),px(%1001100)
        .byte px(%0110011),px(%0011001),px(%1001100),px(%1100110)
        .byte px(%0100110),px(%0110011),px(%0011001),px(%1001100)
        .byte px(%0110011),px(%0011001),px(%1001100),px(%1100110)
        .byte px(%0000000),px(%0000000),px(%0000000),px(%0000000)
piece12:
        .byte px(%0110110),px(%1011111),px(%1111111),px(%1111110)
        .byte px(%0101101),px(%1011111),px(%1111111),px(%1111110)
        .byte px(%0011011),px(%0101111),px(%1111111),px(%1111110)
        .byte px(%0110110),px(%1101111),px(%1111111),px(%1111110)
        .byte px(%0101010),px(%1010111),px(%1111111),px(%1111110)
        .byte px(%0101010),px(%1010011),px(%1111111),px(%1111110)
        .byte px(%0101010),px(%1010011),px(%1111111),px(%1111110)
        .byte px(%0101010),px(%1010101),px(%1111111),px(%1111110)
        .byte px(%0101010),px(%1010100),px(%1111111),px(%1111110)
        .byte px(%0101010),px(%1010101),px(%0011111),px(%1111110)
        .byte px(%0101010),px(%1010101),px(%0100111),px(%1111110)
        .byte px(%0100110),px(%0110011),px(%0010111),px(%1111110)
        .byte px(%0110011),px(%0011001),px(%1001111),px(%1111110)
        .byte px(%0100110),px(%0110011),px(%0001111),px(%1111110)
        .byte px(%0110011),px(%0011001),px(%1011111),px(%1111110)
        .byte px(%0000000),px(%0000000),px(%0000000),px(%0000000)
piece13:                       ; the hole
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111011),px(%1011101),px(%1101110),px(%1110110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0101110),px(%1110111),px(%0111011),px(%1011100)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111011),px(%1011101),px(%1101110),px(%1110110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0101110),px(%1110111),px(%0111011),px(%1011100)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111011),px(%1011101),px(%1101110),px(%1110110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0101110),px(%1110111),px(%0111011),px(%1011100)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111011),px(%1011101),px(%1101110),px(%1110110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0000000),px(%0000000),px(%0000000),px(%0000000)
piece14:
        .byte px(%0001100),px(%1100110),px(%0110011),px(%0011000)
        .byte px(%0100110),px(%0110011),px(%0011001),px(%1001100)
        .byte px(%0110011),px(%0011001),px(%1001100),px(%1100110)
        .byte px(%0011011),px(%0110110),px(%1101101),px(%1011010)
        .byte px(%0100101),px(%1011011),px(%0110110),px(%1101100)
        .byte px(%0110010),px(%1101101),px(%1011011),px(%0110110)
        .byte px(%0111001),px(%0110110),px(%1101101),px(%1011010)
        .byte px(%0111110),px(%0111011),px(%0110110),px(%1101100)
        .byte px(%0111111),px(%1000101),px(%1011000),px(%0000000)
        .byte px(%0111111),px(%1111000),px(%0000001),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0000000),px(%0000000),px(%0000000),px(%0000000)
piece15:
        .byte px(%0001100),px(%1100110),px(%0110011),px(%0011000)
        .byte px(%0100110),px(%0110011),px(%0011001),px(%1001100)
        .byte px(%0110011),px(%0011001),px(%1001100),px(%1100110)
        .byte px(%0110110),px(%1101101),px(%1011011),px(%0110110)
        .byte px(%0011011),px(%0110110),px(%1101101),px(%1011010)
        .byte px(%0101101),px(%1011011),px(%0110110),px(%1101100)
        .byte px(%0110110),px(%1101101),px(%1011011),px(%0110110)
        .byte px(%0011011),px(%0110110),px(%1101101),px(%1011010)
        .byte px(%0000000),px(%0000000),px(%0000110),px(%1101100)
        .byte px(%0111111),px(%1111111),px(%1100000),px(%0000010)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0000000),px(%0000000),px(%0000000),px(%0000000)
piece16:
        .byte px(%0001100),px(%1100110),px(%0011111),px(%1111110)
        .byte px(%0100110),px(%0110011),px(%0111111),px(%1111110)
        .byte px(%0110011),px(%0011000),px(%1111111),px(%1111110)
        .byte px(%0101101),px(%1011001),px(%1111111),px(%1111110)
        .byte px(%0110110),px(%1100111),px(%1111111),px(%1111110)
        .byte px(%0011011),px(%0011111),px(%1111111),px(%1111110)
        .byte px(%0101110),px(%0111111),px(%1111111),px(%1111110)
        .byte px(%0100111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0111111),px(%1111111),px(%1111111),px(%1111110)
        .byte px(%0000000),px(%0000000),px(%0000000),px(%0000000)


.proc fill_rect_params
        .word   1, 0, default_width, default_height
.endproc

.proc pattern_speckles
        .byte   $77,$DD,$77,$DD,$77,$DD,$77,$DD
.endproc

        .byte   $00             ; ???

.proc pattern_black
        .res    8, 0
.endproc

        ;; ???
        .byte   $00
        .res    8, $FF
        .byte   $00

;; line across top of puzzle (bitmaps include bottom edges)
.proc set_pos_params
xcoord: .word   5
ycoord: .word   2
.endproc
.proc draw_line_params
xdelta: .word   112
ydelta: .word   0
.endproc

        ;; hole position (0..3, 0..3)
hole_x: .byte   0
hole_y: .byte   0

        ;; click location (0..3, 0..3)
click_x:  .byte   $00
click_y:  .byte   $00

        ;; param for draw_row/draw_col
draw_rc:  .byte   $00

        ;; params for draw_selected
draw_end:  .byte   $00
draw_inc:  .byte   $00

.proc destroy_window_params
id:     .byte   window_id
.endproc

        .byte   $73,$00,$F7,$FF
        .addr   str
        .byte   $01
        .byte   $00,$00,$00,$00,$00,$06,$00,$05
        .byte   $00
str:    .byte   $41,$35,$47,$37,$36,$49   ; "A#G%#I" ?

        ;; SET_STATE params (filled in by QUERY_STATE)
set_state_params:
        .byte   $00,$00,$00,$00,$00,$00,$00,$00
        .byte   $00,$00,$00,$00,$00,$00,$00,$00
        .byte   $00,$00,$00,$00,$00,$00,$00,$00
        .byte   $00,$00,$00,$00,$00,$00,$00,$00
        .byte   $00,$00,$00,$00,$00,$00,$00,$0D
        .byte   $00,$00,$20,$80,$00,$00,$00,$00
        .byte   $00,$2F,$02,$B1,$00,$00,$01,$02
        .byte   $06

        default_left    := 220
        default_top     := 80
        default_width   := $79
        default_height  := $44

.proc create_window_params
id:     .byte   window_id
flags:  .byte   A2D_CWF_ADDCLOSE
title:  .addr   name
hscroll:.byte   A2D_CWS_NOSCROLL
vscroll:.byte   A2D_CWS_NOSCROLL
hsmax:  .byte   0
hspos:  .byte   0
vsmax:  .byte   0
vspos:  .byte   0
        .byte   0,0             ; ???
w1:     .word   default_width
h1:     .word   default_height
w2:     .word   default_width
h2:     .word   default_height

left:   .word   default_left
top:    .word   default_top
addr:   .addr   A2D_SCREEN_ADDR
stride: .word   A2D_SCREEN_STRIDE
hoff:   .word   0
voff:   .word   0
width:  .word   default_width
height: .word   default_height

pattern:.res    8, $FF
mskand: .byte   A2D_DEFAULT_MSKAND
mskor:  .byte   A2D_DEFAULT_MSKOR
xpos:   .word   0
ypos:   .word   0
hthick: .byte   1
vthick: .byte   1
mode:   .byte   0
tmask:  .byte   $7F
font:   .addr   A2D_DEFAULT_FONT
next:   .addr   0
.endproc

        ;; This is QUERY_STATE/SET_BOX cruft only below
.proc box_cruft                 ; Unknown usage
left:   .word   default_left
top:    .word   default_top
addr:   .addr   A2D_SCREEN_ADDR
stride: .word   A2D_SCREEN_STRIDE
hoff:   .word   0
voff:   .word   0
width:  .word   default_width
height: .word   default_height
pattern:.res    8, $FF
mskand: .byte   A2D_DEFAULT_MSKAND
mskor:  .byte   A2D_DEFAULT_MSKOR
xpos:   .word   0
ypos:   .word   0
hthick: .byte   1
vthick: .byte   1
mode:   .byte   0
tmask:  .byte   $7F
font:   .addr   A2D_DEFAULT_FONT
        .byte   0,0             ; ???
.endproc

name:   PASCAL_STRING "Puzzle"

        create_window_params_top := create_window_params::top

;;; ==================================================
;;; Create the window

.proc create_window
        jsr     save_zp
        A2D_CALL A2D_CREATE_WINDOW, create_window_params

        ;; init pieces
        ldy     #15
loop:   tya
        sta     position_table,y
        dey
        bpl     loop

        lda     #window_id
        jsr     check_window_pos
        A2D_CALL $2B            ; ???

        ;; Scramble?
.proc scramble
        ldy     #3
sloop:  tya
        pha
        ldx     position_table
        ldy     #0
ploop:  lda     position_table+1,y
        sta     position_table,y
        iny
        cpy     #15
        bcc     ploop

        stx     position_table+15
        pla
        tay
        dey
        bne     sloop
        ldx     position_table
        lda     position_table+1
        sta     position_table
        stx     position_table+1
.endproc

        A2D_CALL A2D_GET_INPUT, get_input_params
        lda     get_input_params::state
        beq     scramble
        jsr     check_victory
        bcs     scramble
        jsr     draw_all
        jsr     find_hole
        ; fall through
.endproc

;;; ==================================================
;;; Input loop and processing

.proc input_loop
        A2D_CALL A2D_GET_INPUT, get_input_params
        lda     get_input_params::state
        cmp     #A2D_INPUT_DOWN
        bne     :+
        jsr     on_click
        jmp     input_loop

        ;; key?
:       cmp     #A2D_INPUT_KEY
        bne     input_loop
        jsr     check_key
        jmp     input_loop

        ;; click - where?
on_click:
        A2D_CALL A2D_QUERY_TARGET, query_target_params
        lda     query_target_params::id
        cmp     #window_id
        bne     bail
        lda     query_target_params::element
        bne     :+
bail:   rts

        ;; client area?
:       cmp     #A2D_ELEM_CLIENT
        bne     :+
        jsr     find_click_piece
        bcc     bail
        jmp     process_click

        ;; close box?
:       cmp     #A2D_ELEM_CLOSE
        bne     check_title
        A2D_CALL A2D_CLOSE_CLICK, close_click_params
        lda     close_click_params::clicked
        beq     bail
destroy:
        A2D_CALL A2D_DESTROY_WINDOW, destroy_window_params
        DESKTOP_CALL DESKTOP_REDRAW_ICONS

        target = $20            ; copy following to ZP and run it
        ldx     #sizeof_routine
loop:   lda     routine,x
        sta     target,x
        dex
        bpl     loop
        jmp     target

.proc routine
        sta     RAMRDOFF
        sta     RAMWRTOFF
        jmp     exit_da
.endproc
        sizeof_routine := * - routine

        ;; title bar?
check_title:
        cmp     #A2D_ELEM_TITLE
        bne     bail
        lda     #window_id
        sta     drag_window_params::id
        A2D_CALL A2D_DRAG_WINDOW, drag_window_params
        ldx     #$23
        jsr     redraw_screen
        rts

        ;; on key press - exit if Escape
check_key:
        lda     get_input_params::modifiers
        bne     :+
        lda     get_input_params::key
        cmp     #KEY_ESCAPE
        beq     destroy
:       rts
.endproc

;;; ==================================================
;;; Map click to piece x/y

.proc find_click_piece
        lda     #window_id
        sta     map_coords_params::id
        A2D_CALL A2D_MAP_COORDS, map_coords_params
        lda     map_coords_params::clientx+1
        ora     map_coords_params::clienty+1
        bne     nope            ; ensure high bytes are 0

        lda     map_coords_params::clienty
        ldx     map_coords_params::clientx

        cmp     #r1
        bcc     nope
        cmp     #r2+1
        bcs     :+
        jsr     find_click_x
        bcc     nope
        lda     #0
        beq     yep
:       cmp     #r3+1
        bcs     :+
        jsr     find_click_x
        bcc     nope
        lda     #1
        bne     yep
:       cmp     #r4+1
        bcs     :+
        jsr     find_click_x
        bcc     nope
        lda     #2
        bne     yep
:       cmp     #r4+rh+1
        bcs     nope
        jsr     find_click_x
        bcc     nope
        lda     #3

yep:    sta     click_y
        sec
        rts

nope:   clc
        rts
.endproc

.proc find_click_x
        cpx     #c1
        bcc     nope
        cpx     #c2
        bcs     :+
        lda     #0
        beq     yep
:       cpx     #c3+1
        bcs     :+
        lda     #1
        bne     yep
:       cpx     #c4+1
        bcs     :+
        lda     #2
        bne     yep
:       cpx     #c4+cw
        bcs     nope
        lda     #3

yep:    sta     click_x
        sec
        rts

nope:   clc
        rts
.endproc

;;; ==================================================
;;; Process piece click

        hole_piece := 12

.proc process_click

        lda     #0
        ldy     hole_y
        beq     L0FC9
L0FC3:  clc
        adc     #4
        dey
        bne     L0FC3

L0FC9:  sta     draw_rc
        clc
        adc     hole_x
        tay
        lda     click_x
        cmp     hole_x
        beq     click_in_col
        lda     click_y
        cmp     hole_y
        beq     click_in_row

miss:   rts                     ; Click on hole, or not row/col with hole

.proc click_in_row
        lda     click_x
        cmp     hole_x
        beq     miss
        bcs     after

        lda     hole_x          ; click before of hole
        sec
        sbc     click_x
        tax
bloop:  lda     position_table-1,y
        sta     position_table,y
        dey
        dex
        bne     bloop
        beq     row

after:  lda     click_x         ; click after hole
        sec
        sbc     hole_x
        tax
aloop:  lda     position_table+1,y
        sta     position_table,y
        iny
        dex
        bne     aloop
        beq     row
.endproc

.proc click_in_col
        lda     click_y
        cmp     hole_y
        beq     miss
        bcs     after

        lda     hole_y          ; click before hole
        sec
        sbc     click_y
        tax
bloop:  lda     position_table-4,y
        sta     position_table,y
        dey
        dey
        dey
        dey
        dex
        bne     bloop
        beq     col

after:  lda     click_y         ; click after hole
        sec
        sbc     hole_y
        tax
aloop:  lda     position_table+4,y
        sta     position_table,y
        iny
        iny
        iny
        iny
        dex
        bne     aloop
.endproc

col:    lda     #hole_piece
        sta     position_table,y
        jsr     draw_col
        jmp     done

row:    lda     #hole_piece
        sta     position_table,y
        jsr     draw_row

done:   jsr     check_victory
        bcc     after_click

        ;; Yay! Play the sound 4 times
.proc on_victory
        ldx     #4
loop:   txa
        pha
        jsr     play_sound
        pla
        tax
        dex
        bne     loop
.endproc

after_click:
        jmp     find_hole

        rts                     ; ???
.endproc

;;; ==================================================
;;; Clear the background

draw_window:
        A2D_CALL A2D_SET_PATTERN, pattern_speckles
        A2D_CALL A2D_FILL_RECT, fill_rect_params
        A2D_CALL A2D_SET_PATTERN, pattern_black

        A2D_CALL A2D_SET_POS, set_pos_params
        A2D_CALL A2D_DRAW_LINE, draw_line_params

        jsr     draw_all

        lda     #window_id
        sta     query_state_params::id
        A2D_CALL A2D_QUERY_STATE, query_state_params
        A2D_CALL A2D_SET_STATE, set_state_params
        rts

;;; ==================================================

.proc save_zp
        ldx     #$00
loop:   lda     $00,x
        sta     saved_zp,x
        dex
        bne     loop
        rts
.endproc

.proc restore_zp
        ldx     #$00
loop:   lda     saved_zp,x
        sta     $00,x
        dex
        bne     loop
        rts
.endproc

saved_zp:
        .res    256, 0

;;; ==================================================
;;; Draw pieces

.proc draw_all
        ldy     #1
        sty     draw_inc
        dey
        lda     #16
        sta     draw_end
        bne     draw_selected
.endproc

.proc draw_row                  ; row specified in draw_rc
        lda     #1
        sta     draw_inc
        lda     draw_rc
        tay
        clc
        adc     #4
        sta     draw_end
        bne     draw_selected
.endproc

.proc draw_col                  ; col specified in draw_rc
        lda     #4
        sta     draw_inc
        ldy     hole_x
        lda     #16
        sta     draw_end
        ;; fall through
.endproc

        ;; Draw pieces from A to draw_end, step draw_inc
.proc draw_selected
        tya
        pha
        A2D_CALL A2D_HIDE_CURSOR
        lda     #window_id
        sta     query_state_params::id
        A2D_CALL A2D_QUERY_STATE, query_state_params
        A2D_CALL A2D_SET_STATE, set_state_params
        pla
        tay

loop:   tya
        pha
        asl     a
        asl     a
        tax
        lda     space_positions,x
        sta     draw_bitmap_params::left
        lda     space_positions+1,x
        sta     draw_bitmap_params::left+1
        lda     space_positions+2,x
        sta     draw_bitmap_params::top
        lda     space_positions+3,x
        sta     draw_bitmap_params::top+1
        lda     position_table,y
        asl     a
        tax
        lda     bitmap_table,x
        sta     draw_bitmap_params::addr
        lda     bitmap_table+1,x
        sta     draw_bitmap_params::addr+1
        A2D_CALL A2D_DRAW_BITMAP, draw_bitmap_params
        pla
        clc
        adc     draw_inc
        tay
        cpy     draw_end
        bcc     loop
        A2D_CALL A2D_SHOW_CURSOR
        rts
.endproc

;;; ==================================================
;;; Play sound

.proc play_sound
        ldx     #$80
loop1:  lda     #$58
loop2:  ldy     #$1B
delay1: dey
        bne     delay1
        bit     SPKR
        tay
delay2: dey
        bne     delay2
        sbc     #1
        beq     loop1
        bit     SPKR
        dex
        bne     loop2
        rts
.endproc

;;; ==================================================
;;; Puzzle complete?

        ;; Returns with carry set if puzzle complete
.proc check_victory             ; Allows for swapped indistinct pieces, etc.
        ;; 0/12 can be swapped
        lda     position_table
        beq     :+
        cmp     #12
        bne     nope

:       ldy     #1
c1234:  tya
        cmp     position_table,y
        bne     nope
        iny
        cpy     #5
        bcc     c1234

        ;; 5/6 are identical
        lda     position_table+5
        cmp     #5
        beq     :+
        cmp     #6
        bne     nope
:       lda     position_table+6
        cmp     #5
        beq     :+
        cmp     #6
        bne     nope
:       lda     position_table+7
        cmp     #7
        bne     nope
        lda     position_table+8
        cmp     #8
        bne     nope

        ;; 9/10 are identical
        lda     position_table+9
        cmp     #9
        beq     :+
        cmp     #10
        bne     nope
:       lda     position_table+10
        cmp     #9
        beq     :+
        cmp     #10
        bne     nope

:       lda     position_table+11
        cmp     #11
        bne     nope

        ;; 0/12 can be swapped
        lda     position_table+12
        beq     :+
        cmp     #12
        bne     nope

:       ldy     #13
c131415:tya
        cmp     position_table,y
        bne     nope
        iny
        cpy     #16
        bcc     c131415
        rts

nope:   clc
        rts
.endproc

;;; ==================================================
;;; Find hole piece

.proc find_hole
        ldy     #15
loop:   lda     position_table,y
        cmp     #hole_piece
        beq     :+
        dey
        bpl     loop

:       lda     #0
        sta     hole_x
        sta     hole_y

        tya
again:  cmp     #4
        bcc     done
        sbc     #4
        inc     hole_y
        bne     again

done:   sta     hole_x
        rts
.endproc

last := *