195 lines
2.7 KiB
ArmAsm
195 lines
2.7 KiB
ArmAsm
; D'NI -- deep beneath New Mexico
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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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dni_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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sta ANIMATE_FRAME
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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 update_game_complete
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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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; things always happening
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lda LOCATION
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cmp #DNI_DESK
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bne done_foreground
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jsr draw_atrus
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done_foreground:
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;====================================
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; handle animations
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;====================================
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; things only happening when animating
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lda LOCATION
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cmp #DNI_MIST_BOOK_OPEN
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bne nothing_special
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animate_mist_book:
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lda DIRECTION
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cmp #DIRECTION_N
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bne done_animate_book
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lda ANIMATE_FRAME
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cmp #6
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bcc mist_book_good ; blt
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lda #0
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sta ANIMATE_FRAME
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mist_book_good:
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asl
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tay
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lda mist_movie,Y
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sta INL
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lda mist_movie+1,Y
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sta INH
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lda #24
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sta XPOS
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lda #12
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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 done_animate_book
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inc ANIMATE_FRAME
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done_animate_book:
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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_dni/dni_graphics.inc"
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; puzzles
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.include "dni_ending.s"
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; linking books
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.include "link_book_mist.s"
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; books
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; level data
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.include "leveldata_dni.inc"
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