218 lines
3.1 KiB
ArmAsm
218 lines
3.1 KiB
ArmAsm
; Mist
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; a version of Myst?
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; (yes there's a subtle German joke here)
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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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mist_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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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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;=================
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; init vars
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; FIXME: we could be re-called from other books
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; so don't set location here
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lda #0
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sta LOCATION
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lda #0
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sta DIRECTION
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lda LOCATION
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bne not_first_time
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; first time init
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lda #0
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sta CLOCK_MINUTE
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sta CLOCK_HOUR
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jsr clock_inside_reset
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; lda #0
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; sta GEAR_OPEN
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lda #1
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sta GEAR_OPEN
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jsr open_the_gear
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not_first_time:
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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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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 GEAR_OPEN
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beq not_gear_related
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jsr check_gear_delete
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not_gear_related:
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lda LOCATION
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cmp #25 ; clock puzzle
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beq location_clock
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cmp #27
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beq location_inside_clock
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bne nothing_special
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location_clock:
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jsr draw_clock_face
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jmp nothing_special
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location_inside_clock:
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jsr draw_clock_inside
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jmp nothing_special
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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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exit_level:
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lda #2
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sta WHICH_LOAD
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lda #$ff
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sta LEVEL_OVER
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rts
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;==========================
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; includes
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;==========================
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.include "gr_copy.s"
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.include "gr_offsets.s"
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.include "gr_pageflip.s"
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.include "gr_putsprite_crop.s"
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.include "text_print.s"
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.include "gr_fast_clear.s"
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.include "decompress_fast_v2.s"
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.include "keyboard.s"
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.include "draw_pointer.s"
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.include "audio.s"
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.include "graphics_island/mist_graphics.inc"
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.include "end_level.s"
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; puzzles
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.include "clock_bridge_puzzle.s"
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.include "marker_switch.s"
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.include "brother_books.s"
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; linking books
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.include "link_book_mist.s"
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; letters
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.include "letter_cat.s"
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.include "common_sprites.inc"
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.include "leveldata_island.inc"
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;.align $100
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;audio_red_page:
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;.incbin "audio/red_page.btc"
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audio_link_noise:
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.incbin "audio/link_noise.btc"
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