2020-06-28 04:07:58 +00:00
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; 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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2020-06-30 18:13:33 +00:00
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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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2020-06-28 04:07:58 +00:00
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; beq animate_mist_book
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2020-06-30 18:13:33 +00:00
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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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2020-06-28 04:07:58 +00:00
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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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2020-06-30 18:13:33 +00:00
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; book pages
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.include "handle_pages.s"
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