228 lines
3.3 KiB
ArmAsm
228 lines
3.3 KiB
ArmAsm
; The third level of Channely Wood
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; Nibelheim, home in the clouds
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; by deater (Vince Weaver) <vince@deater.net>
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; Zero Page
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.include "zp.inc"
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.include "hardware.inc"
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.include "common_defines.inc"
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.include "common_routines.inc"
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nibel_start:
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;===================
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; init screen
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jsr TEXT
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jsr HOME
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bit KEYRESET
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bit SET_GR
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bit PAGE0
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bit LORES
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bit FULLGR
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;=================
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; set up location
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;=================
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lda #<locations
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sta LOCATIONS_L
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lda #>locations
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sta LOCATIONS_H
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lda #0
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sta DRAW_PAGE
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sta LEVEL_OVER
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; init cursor
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lda #20
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sta CURSOR_X
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sta CURSOR_Y
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; set up initial location
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jsr change_location
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lda #1
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sta CURSOR_VISIBLE ; visible at first
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lda #0
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sta ANIMATE_FRAME
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game_loop:
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;=================
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; reset things
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;=================
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lda #0
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sta IN_SPECIAL
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sta IN_RIGHT
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sta IN_LEFT
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;====================================
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; copy background to current page
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;====================================
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jsr gr_copy_to_current
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;====================================
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; handle special-case forground logic
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;====================================
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lda LOCATION
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cmp #NIBEL_BLUE_ROOM
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beq fg_draw_blue_page
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cmp #NIBEL_RED_TABLE_OPEN
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beq fg_draw_red_page
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cmp #NIBEL_BLUE_HOUSE_VIEWER
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beq animate_viewer
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cmp #NIBEL_SHACK_ENTRANCE
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beq animate_projector
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cmp #NIBEL_SHACK_CENTER
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beq animate_trap
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cmp #NIBEL_BLUE_PATH_2P25
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beq animate_gate_s
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cmp #NIBEL_BLUE_PATH_2P5
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beq animate_gate_n
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jmp nothing_special
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fg_draw_blue_page:
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jsr draw_blue_page
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jmp nothing_special
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fg_draw_red_page:
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jsr draw_red_page
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jmp nothing_special
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animate_projector:
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jsr draw_projection
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jmp nothing_special
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animate_trap:
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jsr draw_trap
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jmp nothing_special
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animate_gate_s:
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jsr update_gate_s
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jmp nothing_special
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animate_gate_n:
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jsr update_gate_n
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jmp nothing_special
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animate_viewer:
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lda ANIMATE_FRAME
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beq nothing_special
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cmp #6
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beq viewer_done
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sec
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sbc #1
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asl
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tay
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lda current_button_animation
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sta OUTL
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lda current_button_animation+1
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sta OUTH
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lda (OUTL),Y
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sta INL
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iny
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lda (OUTL),Y
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sta INH
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lda #14
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sta XPOS
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lda #10
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sta YPOS
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jsr put_sprite_crop
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lda FRAMEL
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and #$f
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bne nothing_special
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lda ANIMATE_FRAME
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cmp #5
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bne short_frame
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long_frame:
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inc LONG_FRAME
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lda LONG_FRAME
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cmp #30
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bne nothing_special
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short_frame:
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inc ANIMATE_FRAME
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lda #0
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sta LONG_FRAME
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jmp nothing_special
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viewer_done:
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lda #0
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sta ANIMATE_FRAME
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nothing_special:
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;====================================
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; draw pointer
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;====================================
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jsr draw_pointer
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;====================================
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; page flip
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;====================================
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jsr page_flip
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;====================================
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; handle keypress/joystick
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;====================================
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jsr handle_keypress
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;====================================
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; inc frame count
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;====================================
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inc FRAMEL
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bne room_frame_no_oflo
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inc FRAMEH
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room_frame_no_oflo:
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;====================================
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; check level over
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;====================================
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lda LEVEL_OVER
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bne really_exit
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jmp game_loop
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really_exit:
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jmp end_level
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;==========================
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; includes
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;==========================
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; level graphics
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.include "graphics_nibel/nibel_graphics.inc"
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; puzzles
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.include "nibel_switches.s"
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; level data
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.include "leveldata_nibel.inc"
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; book pages
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.include "handle_pages.s"
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