878 lines
17 KiB
ArmAsm
878 lines
17 KiB
ArmAsm
;===========================
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|
; draw windmill handle
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;===========================
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|
|
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draw_windmill_handle:
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lda DIRECTION
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and #$f
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cmp #DIRECTION_N
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bne no_draw_windmill_handle
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|
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lda CHANNEL_SWITCHES
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and #CHANNEL_SW_WINDMILL
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beq no_draw_windmill_handle
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lda #11
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sta XPOS
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lda #32
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sta YPOS
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lda #<windmill_handle_sprite
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sta INL
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lda #>windmill_handle_sprite
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sta INH
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jsr put_sprite_crop
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no_draw_windmill_handle:
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rts
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windmill_handle_sprite:
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.byte 3,2
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.byte $04,$ff,$44
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.byte $21,$41,$41
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;===========================
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; draw water valve
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;===========================
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draw_water_faucet:
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lda CHANNEL_SWITCHES
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and #CHANNEL_SW_FAUCET
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beq no_draw_faucet
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lda #17
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sta XPOS
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lda #20
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sta YPOS
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lda #<faucet_open_sprite
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sta INL
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lda #>faucet_open_sprite
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sta INH
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jsr put_sprite_crop
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no_draw_faucet:
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rts
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faucet_open_sprite:
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.byte 6,6
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.byte $77,$77,$ff,$ff,$ff,$ff
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.byte $f9,$97,$77,$9f,$f9,$ff
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.byte $ff,$97,$d0,$9f,$ff,$ff
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.byte $f9,$dd,$dd,$dd,$f9,$ff
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.byte $ff,$ff,$dd,$77,$67,$27
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.byte $ff,$ff,$fd,$77,$82,$96
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;===========================
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;===========================
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; handle valve 1-6
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;===========================
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;===========================
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handle_valve1:
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lda CHANNEL_VALVES
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eor #CHANNEL_VALVE1
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jmp common_handle_valves
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handle_valve2:
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lda CHANNEL_VALVES
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eor #CHANNEL_VALVE2
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jmp common_handle_valves
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handle_valve3:
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lda CHANNEL_VALVES
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eor #CHANNEL_VALVE3
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jmp common_handle_valves
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handle_valve4:
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lda CHANNEL_VALVES
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eor #CHANNEL_VALVE4
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jmp common_handle_valves
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handle_valve5:
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lda CHANNEL_VALVES
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eor #CHANNEL_VALVE5
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jmp common_handle_valves
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handle_valve6:
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lda CHANNEL_VALVES
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eor #CHANNEL_VALVE6
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common_handle_valves:
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sta CHANNEL_VALVES
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jsr adjust_valve_backgrounds
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jsr click_speaker
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jmp change_direction ; update background
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;===========================
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;===========================
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; goto valves multiple case
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;===========================
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;===========================
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; path5
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goto_path5_valve:
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lda DIRECTION
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cmp #DIRECTION_N
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bne path5_south
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path5_north:
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lda CURSOR_Y
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cmp #38
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bcc path5_go_north ; blt
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jmp goto_valve2
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path5_go_north:
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lda #CHANNEL_PATH7 ; didn't hit valve, move instead
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sta LOCATION
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jmp change_location
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path5_south:
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lda CURSOR_Y
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cmp #32
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bcs path5_go_south
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jmp goto_valve5
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path5_go_south:
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lda #CHANNEL_PATH6 ; didn't hit valve, move instead
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sta LOCATION
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jmp change_location
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; path6
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; 6S goes to valve6
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; 6W goes to valve5
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; 6N goes to valve4
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goto_path6_valve:
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lda DIRECTION
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cmp #DIRECTION_S
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beq path6_south
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cmp #DIRECTION_W
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beq path6_west
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path6_north:
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lda CURSOR_Y
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cmp #38
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bcc path6_go_north ; blt
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jmp goto_valve5
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path6_go_north:
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lda #CHANNEL_PATH5 ; didn't hit valve, move instead
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sta LOCATION
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jmp change_location
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path6_south:
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lda CURSOR_Y
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cmp #32
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bcs path6_go_south ; bge
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jmp goto_valve6
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path6_go_south:
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lda #CHANNEL_PATH2 ; didn't hit valve, move instead
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sta LOCATION
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jmp change_location
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path6_west:
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lda CURSOR_Y
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cmp #32
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bcs path6_go_west ; bge
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jmp goto_valve4
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path6_go_west:
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lda #CHANNEL_FORK ; didn't hit valve, move instead
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sta LOCATION
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jmp change_location
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;===========================
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;===========================
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; goto valves
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;===========================
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;===========================
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goto_valve1:
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lda #CHANNEL_VALVE1_ELEVATOR2
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bne common_goto_valve ; bra
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goto_valve2:
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lda #CHANNEL_VALVE2_TREE
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bne common_goto_valve ; bra
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goto_valve3:
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lda #CHANNEL_VALVE3_BROKEN
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bne common_goto_valve ; bra
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goto_valve4:
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lda #CHANNEL_VALVE4_ELEVATOR1
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bne common_goto_valve ; bra
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goto_valve5:
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lda #CHANNEL_VALVE5_FORK
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bne common_goto_valve ; bra
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goto_valve6:
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lda #CHANNEL_VALVE6_ENTRY
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bne common_goto_valve ; bra
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common_goto_valve:
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sta LOCATION
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jmp change_location
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;===========================
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;===========================
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; adjust valve backgrounds
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;===========================
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;===========================
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adjust_valve_backgrounds:
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;=======================
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; for valve1
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check_valve1:
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lda CHANNEL_VALVES
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and #CHANNEL_VALVE1
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beq valve1_is_off
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valve1_is_on:
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ldy #LOCATION_NORTH_BG
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lda #<valve_bottom_on_lzsa
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sta location38,Y ; CHANNEL_VALVE1_ELEVATOR2
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lda #>valve_bottom_on_lzsa
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sta location38+1,Y ; CHANNEL_VALVE1_ELEVATOR2
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ldy #LOCATION_SOUTH_BG
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lda #<valve_top_on_lzsa
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sta location38,Y ; CHANNEL_VALVE1_ELEVATOR2
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lda #>valve_top_on_lzsa
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sta location38+1,Y ; CHANNEL_VALVE1_ELEVATOR2
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jmp check_valve2
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valve1_is_off:
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ldy #LOCATION_NORTH_BG
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lda #<valve_bottom_off_lzsa
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sta location38,Y ; CHANNEL_VALVE1_ELEVATOR2
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lda #>valve_bottom_off_lzsa
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sta location38+1,Y ; CHANNEL_VALVE1_ELEVATOR2
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ldy #LOCATION_SOUTH_BG
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lda #<valve_top_off_lzsa
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sta location38,Y ; CHANNEL_VALVE1_ELEVATOR2
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lda #>valve_top_off_lzsa
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sta location38+1,Y ; CHANNEL_VALVE1_ELEVATOR2
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check_valve2:
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lda CHANNEL_VALVES
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and #CHANNEL_VALVE2
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beq valve2_is_off
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valve2_is_on:
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ldy #LOCATION_NORTH_BG
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lda #<valve_bottom_on_lzsa
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sta location39,Y ; CHANNEL_VALVE2
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lda #>valve_bottom_on_lzsa
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sta location39+1,Y ; CHANNEL_VALVE2
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ldy #LOCATION_SOUTH_BG
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lda #<valve_top_on_lzsa
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sta location39,Y ; CHANNEL_VALVE2
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lda #>valve_top_on_lzsa
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sta location39+1,Y ; CHANNEL_VALVE2
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jmp check_valve3
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valve2_is_off:
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ldy #LOCATION_NORTH_BG
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lda #<valve_bottom_off_lzsa
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sta location39,Y ; CHANNEL_VALVE2
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lda #>valve_bottom_off_lzsa
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sta location39+1,Y ; CHANNEL_VALVE2
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ldy #LOCATION_SOUTH_BG
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lda #<valve_top_off_lzsa
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sta location39,Y ; CHANNEL_VALVE2
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lda #>valve_top_off_lzsa
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sta location39+1,Y ; CHANNEL_VALVE2
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check_valve3:
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lda CHANNEL_VALVES
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and #CHANNEL_VALVE3
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beq valve3_is_off
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valve3_is_on:
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ldy #LOCATION_WEST_BG
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lda #<valve_bottom_on_lzsa
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sta location40,Y ; CHANNEL_VALVE3
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lda #>valve_bottom_on_lzsa
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sta location40+1,Y ; CHANNEL_VALVE3
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jmp check_valve4
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valve3_is_off:
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ldy #LOCATION_WEST_BG
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lda #<valve_bottom_off_lzsa
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sta location40,Y ; CHANNEL_VALVE3
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lda #>valve_bottom_off_lzsa
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sta location40+1,Y ; CHANNEL_VALVE3
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check_valve4:
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|
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lda CHANNEL_VALVES
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and #CHANNEL_VALVE4
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beq valve4_is_off
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valve4_is_on:
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ldy #LOCATION_NORTH_BG
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lda #<valve_bottom_on_lzsa
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sta location41,Y ; CHANNEL_VALVE4
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lda #>valve_bottom_on_lzsa
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sta location41+1,Y ; CHANNEL_VALVE4
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ldy #LOCATION_WEST_BG
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lda #<valve_top_on_lzsa
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sta location41,Y ; CHANNEL_VALVE4
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lda #>valve_top_on_lzsa
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sta location41+1,Y ; CHANNEL_VALVE4
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|
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jmp check_valve5
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valve4_is_off:
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ldy #LOCATION_NORTH_BG
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lda #<valve_bottom_off_lzsa
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sta location41,Y ; CHANNEL_VALVE4
|
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lda #>valve_bottom_off_lzsa
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sta location41+1,Y ; CHANNEL_VALVE4
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|
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ldy #LOCATION_WEST_BG
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lda #<valve_top_off_lzsa
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sta location41,Y ; CHANNEL_VALVE4
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lda #>valve_top_off_lzsa
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sta location41+1,Y ; CHANNEL_VALVE4
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|
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check_valve5:
|
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|
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lda CHANNEL_VALVES
|
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and #CHANNEL_VALVE5
|
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beq valve5_is_off
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|
|
|
valve5_is_on:
|
|
ldy #LOCATION_NORTH_BG
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|
lda #<valve_bottom_on_lzsa
|
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sta location42,Y ; CHANNEL_VALVE5
|
|
lda #>valve_bottom_on_lzsa
|
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sta location42+1,Y ; CHANNEL_VALVE5
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|
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ldy #LOCATION_SOUTH_BG
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lda #<valve_top_on_lzsa
|
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sta location42,Y ; CHANNEL_VALVE5
|
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lda #>valve_top_on_lzsa
|
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sta location42+1,Y ; CHANNEL_VALVE5
|
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|
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jmp check_valve6
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|
|
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valve5_is_off:
|
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ldy #LOCATION_NORTH_BG
|
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lda #<valve_bottom_off_lzsa
|
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sta location42,Y ; CHANNEL_VALVE5
|
|
lda #>valve_bottom_off_lzsa
|
|
sta location42+1,Y ; CHANNEL_VALVE5
|
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|
|
ldy #LOCATION_SOUTH_BG
|
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lda #<valve_top_off_lzsa
|
|
sta location42,Y ; CHANNEL_VALVE5
|
|
lda #>valve_top_off_lzsa
|
|
sta location42+1,Y ; CHANNEL_VALVE5
|
|
|
|
check_valve6:
|
|
|
|
lda CHANNEL_VALVES
|
|
and #CHANNEL_VALVE6
|
|
beq valve6_is_off
|
|
|
|
valve6_is_on:
|
|
ldy #LOCATION_NORTH_BG
|
|
lda #<valve_bottom_on_lzsa
|
|
sta location43,Y ; CHANNEL_VALVE6
|
|
lda #>valve_bottom_on_lzsa
|
|
sta location43+1,Y ; CHANNEL_VALVE6
|
|
|
|
ldy #LOCATION_SOUTH_BG
|
|
lda #<valve_top_on_lzsa
|
|
sta location43,Y ; CHANNEL_VALVE6
|
|
lda #>valve_top_on_lzsa
|
|
sta location43+1,Y ; CHANNEL_VALVE6
|
|
|
|
jmp check_valve_done
|
|
|
|
valve6_is_off:
|
|
ldy #LOCATION_NORTH_BG
|
|
lda #<valve_bottom_off_lzsa
|
|
sta location43,Y ; CHANNEL_VALVE6
|
|
lda #>valve_bottom_off_lzsa
|
|
sta location43+1,Y ; CHANNEL_VALVE6
|
|
|
|
ldy #LOCATION_SOUTH_BG
|
|
lda #<valve_top_off_lzsa
|
|
sta location43,Y ; CHANNEL_VALVE6
|
|
lda #>valve_top_off_lzsa
|
|
sta location43+1,Y ; CHANNEL_VALVE6
|
|
|
|
check_valve_done:
|
|
rts
|
|
|
|
|
|
;===========================
|
|
;===========================
|
|
; pick up myst linking book
|
|
;===========================
|
|
;===========================
|
|
book_room_grab_book:
|
|
|
|
lda #CHANNEL_BOOK_CLOSED
|
|
sta LOCATION
|
|
jmp change_location
|
|
|
|
rts
|
|
|
|
;=============================
|
|
;=============================
|
|
; book elevator handle pulled
|
|
;=============================
|
|
;=============================
|
|
; TODO: animate
|
|
|
|
book_elevator_handle:
|
|
|
|
; click speaker
|
|
bit SPEAKER
|
|
|
|
; check for water power
|
|
lda CHANNEL_SWITCHES
|
|
and #<(CHANNEL_SW_FAUCET|CHANNEL_PIPE_EXTENDED)
|
|
cmp #<(CHANNEL_SW_FAUCET|CHANNEL_PIPE_EXTENDED)
|
|
bne no_book_water_power
|
|
|
|
; check for proper valves
|
|
lda CHANNEL_VALVES
|
|
and #$0b ; check V1,V2,V4,V5
|
|
cmp #$09 ; want V1 V4 on, V2,V5 off
|
|
beq book_water_power_good
|
|
|
|
no_book_water_power:
|
|
rts
|
|
|
|
book_water_power_good:
|
|
; toggle floor
|
|
|
|
lda CHANNEL_SWITCHES
|
|
eor #CHANNEL_BOOK_ELEVATOR_UP
|
|
sta CHANNEL_SWITCHES
|
|
and #CHANNEL_BOOK_ELEVATOR_UP
|
|
bne book_elevator_floor2
|
|
|
|
book_elevator_floor1:
|
|
|
|
; change to ground floor
|
|
ldy #LOCATION_SOUTH_BG
|
|
|
|
lda #<book_elevator_inside_gnd_closed_lzsa
|
|
sta location31,Y ; CHANNEL_BOOK_E_IN_CLOSED
|
|
lda #>book_elevator_inside_gnd_closed_lzsa
|
|
sta location31+1,Y ; CHANNEL_BOOK_E_IN_CLOSED
|
|
|
|
; change exit
|
|
ldy #LOCATION_SOUTH_EXIT
|
|
lda #CHANNEL_BOOK_E_INSIDE_GND
|
|
sta location31,Y ; CHANNEL_BOOK_E_IN_CLOSED
|
|
|
|
jmp book_elevator_handle_done
|
|
book_elevator_floor2:
|
|
|
|
; change to 2nd floor
|
|
ldy #LOCATION_SOUTH_BG
|
|
|
|
lda #<book_elevator_inside_top_closed_lzsa
|
|
sta location31,Y ; CHANNEL_BOOK_E_IN_CLOSED
|
|
lda #>book_elevator_inside_top_closed_lzsa
|
|
sta location31+1,Y ; CHANNEL_BOOK_E_IN_CLOSED
|
|
|
|
; change exit
|
|
ldy #LOCATION_SOUTH_EXIT
|
|
lda #CHANNEL_BOOK_E_INSIDE_TOP
|
|
sta location31,Y ; CHANNEL_BOOK_E_IN_CLOSED
|
|
|
|
book_elevator_handle_done:
|
|
|
|
jsr change_location
|
|
|
|
rts
|
|
|
|
|
|
;=============================
|
|
;=============================
|
|
;=============================
|
|
; elevator1 handle pulled
|
|
;=============================
|
|
;=============================
|
|
; TODO: animate
|
|
|
|
elev1_handle:
|
|
|
|
; click speaker
|
|
bit SPEAKER
|
|
|
|
; check for water power
|
|
lda CHANNEL_SWITCHES
|
|
bpl no_elev1_water_power ; water on is high bit
|
|
|
|
; check for proper valves
|
|
lda CHANNEL_VALVES
|
|
and #$0b ; check V1,V2,V4,V5
|
|
cmp #$01 ; want V1 on, V2,V4,V5 off
|
|
beq elev1_water_power_good
|
|
|
|
no_elev1_water_power:
|
|
rts
|
|
|
|
elev1_water_power_good:
|
|
|
|
; go to next floor, which involves moving to ARBOR level
|
|
|
|
lda #ARBOR_INSIDE_ELEV1
|
|
sta LOCATION
|
|
|
|
lda #DIRECTION_W
|
|
sta DIRECTION
|
|
|
|
lda #LOAD_ARBOR
|
|
sta WHICH_LOAD
|
|
|
|
lda CHANNEL_SWITCHES ; make elevator up
|
|
ora #CHANNEL_ELEVATOR1_UP
|
|
sta CHANNEL_SWITCHES
|
|
|
|
lda #$ff
|
|
sta LEVEL_OVER
|
|
|
|
rts
|
|
|
|
|
|
;=============================
|
|
;=============================
|
|
;=============================
|
|
; climb steps
|
|
;=============================
|
|
;=============================
|
|
|
|
climb_steps:
|
|
|
|
; enter steps, which is in ARBOR level
|
|
|
|
lda #ARBOR_STEPS_BOTTOM
|
|
sta LOCATION
|
|
|
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lda #DIRECTION_E
|
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sta DIRECTION
|
|
|
|
lda #LOAD_ARBOR
|
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sta WHICH_LOAD
|
|
|
|
lda #$ff
|
|
sta LEVEL_OVER
|
|
|
|
rts
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|
|
|
|
|
|
|
;=========================
|
|
;=========================
|
|
; close book elevator door
|
|
;=========================
|
|
;=========================
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|
|
|
book_elevator_close_door:
|
|
|
|
lda #CHANNEL_BOOK_E_IN_CLOSED
|
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sta LOCATION
|
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jmp change_location
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|
|
|
;=========================
|
|
; close elevator1 door
|
|
elev1_close_door:
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|
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lda #CHANNEL_IN_ELEV1_CLOSED
|
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sta LOCATION
|
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jmp change_location
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|
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|
|
|
|
;=======================
|
|
;=======================
|
|
; raise bridge
|
|
;=======================
|
|
;=======================
|
|
; verified real game behavior: can raise and lower bridge if powered with water
|
|
|
|
raise_bridge:
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|
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jsr click_speaker ; click speaker
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|
|
|
; only raise/lower if water is flowing
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|
|
|
; check for water power
|
|
lda CHANNEL_SWITCHES
|
|
bpl no_bridge_water_power ; water on is high bit
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|
|
|
; check for proper valves
|
|
; there are actually two solutions
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|
|
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lda CHANNEL_VALVES
|
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and #$33 ; check V1,V2,V5,V6
|
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cmp #$31 ; want V1,V5,V6 on, V2 off
|
|
beq bridge_water_power_good
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|
|
|
lda CHANNEL_VALVES
|
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and #$07 ; check V1,V2,V3
|
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cmp #$03 ; want V1,V2 on, V3 off
|
|
beq bridge_water_power_good
|
|
|
|
no_bridge_water_power:
|
|
rts
|
|
|
|
bridge_water_power_good:
|
|
|
|
; toggle bridge state
|
|
|
|
lda CHANNEL_SWITCHES
|
|
eor #CHANNEL_BRIDGE_UP
|
|
sta CHANNEL_SWITCHES
|
|
|
|
jsr adjust_after_changes
|
|
|
|
jsr change_location
|
|
|
|
no_raise_bridge:
|
|
rts
|
|
|
|
|
|
|
|
|
|
;=======================
|
|
;=======================
|
|
; extend_pipe
|
|
;=======================
|
|
;=======================
|
|
|
|
; verified: can open/shut even if water is flowing
|
|
|
|
extend_pipe:
|
|
|
|
jsr click_speaker ; click speaker
|
|
|
|
; toggle state
|
|
|
|
lda CHANNEL_SWITCHES
|
|
eor #CHANNEL_PIPE_EXTENDED
|
|
sta CHANNEL_SWITCHES
|
|
|
|
jsr adjust_after_changes
|
|
|
|
jsr change_location
|
|
|
|
no_extend_pipe:
|
|
rts
|
|
|
|
|
|
|
|
;======================================
|
|
;======================================
|
|
; adjust after changes
|
|
;======================================
|
|
;======================================
|
|
|
|
; should call this when entering level
|
|
adjust_after_changes:
|
|
|
|
jsr adjust_valve_backgrounds
|
|
|
|
adjust_bridge:
|
|
;=======================
|
|
; put bridge up or down
|
|
|
|
lda CHANNEL_SWITCHES
|
|
and #CHANNEL_BRIDGE_UP
|
|
beq bridge_is_down
|
|
|
|
bridge_is_up:
|
|
; change to bridge up bg
|
|
ldy #LOCATION_EAST_BG
|
|
|
|
lda #<bridge_up_e_lzsa
|
|
sta location3,Y ; CHANNEL_BRIDGE
|
|
lda #>bridge_up_e_lzsa
|
|
sta location3+1,Y ; CHANNEL_BRIDGE
|
|
|
|
; change to allow crossing bridge
|
|
ldy #LOCATION_EAST_EXIT
|
|
lda #CHANNEL_AFTER_BRIDGE1
|
|
sta location3,Y ; CHANNEL_BRIDGE
|
|
jmp adjust_pipe
|
|
|
|
bridge_is_down:
|
|
; change to bridge down bg
|
|
|
|
ldy #LOCATION_EAST_BG
|
|
|
|
lda #<bridge_down_e_lzsa
|
|
sta location3,Y ; CHANNEL_BRIDGE
|
|
lda #>bridge_down_e_lzsa
|
|
sta location3+1,Y ; CHANNEL_BRIDGE
|
|
|
|
; change to allow crossing bridge
|
|
ldy #LOCATION_EAST_EXIT
|
|
lda #$ff
|
|
sta location3,Y ; CHANNEL_BRIDGE
|
|
|
|
adjust_pipe:
|
|
|
|
;=======================
|
|
; extend pipe or not
|
|
|
|
lda CHANNEL_SWITCHES
|
|
and #CHANNEL_PIPE_EXTENDED
|
|
beq pipe_stowed
|
|
|
|
pipe_extended:
|
|
; change to pipe_extend bg
|
|
ldy #LOCATION_SOUTH_BG
|
|
|
|
lda #<pipe_extend_up_s_lzsa
|
|
sta location27,Y ; CHANNEL_PIPE_EXTEND
|
|
lda #>pipe_extend_up_s_lzsa
|
|
sta location27+1,Y ; CHANNEL_PIPE_EXTEND
|
|
|
|
; also change for other side of bridge
|
|
|
|
ldy #LOCATION_WEST_BG
|
|
|
|
lda #<pipe_bridge2_up_w_lzsa
|
|
sta location10,Y ; CHANNEL_PIPE_BRIDGE2
|
|
lda #>pipe_bridge2_up_w_lzsa
|
|
sta location10+1,Y ; CHANNEL_PIPE_BRIDGE2
|
|
|
|
jmp hide_elevator1
|
|
|
|
pipe_stowed:
|
|
|
|
; change to pipe_extend bg
|
|
ldy #LOCATION_SOUTH_BG
|
|
|
|
lda #<pipe_extend_down_s_lzsa
|
|
sta location27,Y ; CHANNEL_PIPE_EXTEND
|
|
lda #>pipe_extend_down_s_lzsa
|
|
sta location27+1,Y ; CHANNEL_PIPE_EXTEND
|
|
|
|
; also change for other side of bridge
|
|
|
|
ldy #LOCATION_WEST_BG
|
|
|
|
lda #<pipe_bridge2_w_lzsa
|
|
sta location10,Y ; CHANNEL_PIPE_BRIDGE2
|
|
lda #>pipe_bridge2_w_lzsa
|
|
sta location10+1,Y ; CHANNEL_PIPE_BRIDGE2
|
|
|
|
hide_elevator1:
|
|
|
|
lda CHANNEL_SWITCHES
|
|
and #CHANNEL_ELEVATOR1_UP
|
|
beq elevator1_down
|
|
|
|
elevator1_up:
|
|
|
|
; change bgs so elevator up, can't board
|
|
ldy #LOCATION_WEST_BG
|
|
|
|
lda #<before_elev1_gone_w_lzsa
|
|
sta location8,Y ; CHANNEL_BEFORE_ELEV1
|
|
lda #>before_elev1_gone_w_lzsa
|
|
sta location8+1,Y ; CHANNEL_BEFORE_ELEV1
|
|
|
|
lda #<fork_gone_w_lzsa
|
|
sta location7,Y ; CHANNEL_FORK
|
|
lda #>fork_gone_w_lzsa
|
|
sta location7+1,Y ; CHANNEL_FORK
|
|
|
|
; make so can't board
|
|
ldy #LOCATION_WEST_EXIT
|
|
lda #$ff
|
|
sta location8,Y ; CHANNEL_BEFORE_ELEV1
|
|
|
|
jmp open_gate
|
|
|
|
elevator1_down:
|
|
; change bgs so elevator down
|
|
ldy #LOCATION_WEST_BG
|
|
|
|
lda #<before_elev1_w_lzsa
|
|
sta location8,Y ; CHANNEL_BEFORE_ELEV1
|
|
lda #>before_elev1_w_lzsa
|
|
sta location8+1,Y ; CHANNEL_BEFORE_ELEV1
|
|
|
|
lda #<fork_w_lzsa
|
|
sta location7,Y ; CHANNEL_FORK
|
|
lda #>fork_w_lzsa
|
|
sta location7+1,Y ; CHANNEL_FORK
|
|
|
|
; make so can board
|
|
ldy #LOCATION_WEST_EXIT
|
|
lda #CHANNEL_ELEV1_OPEN
|
|
sta location8,Y ; CHANNEL_BEFORE_ELEV1
|
|
|
|
open_gate:
|
|
lda CHANNEL_SWITCHES
|
|
and #CHANNEL_SW_GATE_BOTTOM
|
|
beq gate_closed
|
|
|
|
gate_open:
|
|
|
|
; change bgs so gate open
|
|
|
|
ldy #LOCATION_WEST_BG
|
|
|
|
lda #<steps_path_open_w_lzsa
|
|
sta location12,Y ; CHANNEL_STEPS_PATH
|
|
lda #>steps_path_open_w_lzsa
|
|
sta location12+1,Y ; CHANNEL_STEPS_PATH
|
|
|
|
lda #<steps_door_open_w_lzsa
|
|
sta location13,Y ; CHANNEL_STEPS_DOOR
|
|
lda #>steps_door_open_w_lzsa
|
|
sta location13+1,Y ; CHANNEL_STEPS_DOOR
|
|
|
|
; make so can climb steps
|
|
ldy #LOCATION_SPECIAL_EXIT
|
|
lda #DIRECTION_W
|
|
sta location13,Y ; CHANNEL_STEPS_DOOR
|
|
|
|
jmp done_adjust_changes
|
|
|
|
gate_closed:
|
|
|
|
; change bgs so gate closed
|
|
|
|
ldy #LOCATION_WEST_BG
|
|
|
|
lda #<steps_path_w_lzsa
|
|
sta location12,Y ; CHANNEL_STEPS_PATH
|
|
lda #>steps_path_w_lzsa
|
|
sta location12+1,Y ; CHANNEL_STEPS_PATH
|
|
|
|
lda #<steps_door_w_lzsa
|
|
sta location13,Y ; CHANNEL_STEPS_DOOR
|
|
lda #>steps_door_w_lzsa
|
|
sta location13+1,Y ; CHANNEL_STEPS_DOOR
|
|
|
|
; make so can't climb steps
|
|
ldy #LOCATION_SPECIAL_EXIT
|
|
lda #$ff
|
|
sta location13,Y ; CHANNEL_STEPS_DOOR
|
|
|
|
done_adjust_changes:
|
|
|
|
rts
|