250 lines
3.7 KiB
ArmAsm
250 lines
3.7 KiB
ArmAsm
; Keen PoC Level 1
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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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keen_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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jsr clear_top ; avoid grey stripes at load
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;=====================
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; init vars
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;=====================
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lda #0
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sta ANIMATE_FRAME
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sta FRAMEL
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sta FRAMEH
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sta DISP_PAGE
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sta JOYSTICK_ENABLED
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sta KEEN_WALKING
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sta KEEN_JUMPING
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sta LEVEL_OVER
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sta LASER_OUT
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sta KEEN_XL
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sta SCORE0
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sta SCORE1
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sta SCORE2
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sta KEEN_FALLING
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sta KEEN_SHOOTING
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sta KICK_UP_DUST
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sta DOOR_ACTIVATED
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sta INVENTORY
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lda #<enemy_data
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sta ENEMY_DATAL
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lda #>enemy_data
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sta ENEMY_DATAH
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; FIXME: temporary
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; lda INVENTORY
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; ora #INV_RED_KEY
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; sta INVENTORY
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; lda #$10
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; sta SCORE0
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lda #1
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sta FIREPOWER
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; lda #2 ; draw twice (both pages)
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; sta UPDATE_STATUS
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lda #7
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sta HEALTH
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lda #4
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sta DRAW_PAGE
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lda #18
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sta KEEN_X
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lda #0
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sta KEEN_Y
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lda #1
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sta KEEN_DIRECTION
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; jsr update_status_bar
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;====================================
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; load level1 background
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;====================================
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lda #<level1_bg_zx02
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sta ZX0_src
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lda #>level1_bg_zx02
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sta ZX0_src+1
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lda #$c ; load to page $c00
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jsr full_decomp
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;====================================
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; load level1 tilemap
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;====================================
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lda #<level1_data_zx02
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sta ZX0_src
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lda #>level1_data_zx02
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sta ZX0_src+1
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lda #$90 ; load to page $9000
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jsr full_decomp
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;====================================
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; copy in tilemap subset
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;====================================
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; copies local 16x10 tilemap to $bc00
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; we start out assuming position is 28,0
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; note 16x10 is 32*40
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; if we want full screen it should be 40x48 = 20x12
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lda #28
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sta TILEMAP_X
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lda #0
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sta TILEMAP_Y
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jsr copy_tilemap_subset
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;====================================
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;====================================
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; Main loop
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;====================================
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;====================================
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keen_loop:
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; copy over background
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; jsr gr_copy_to_current
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; draw tilemap
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jsr draw_tilemap
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; draw enemies
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jsr draw_enemies
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; draw laser
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jsr draw_laser
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; draw keen
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jsr draw_keen
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; handle door opening
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; jsr check_open_door
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; draw a status bar
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; jsr draw_status_bar
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jsr page_flip
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jsr handle_keypress
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jsr move_keen
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; jsr move_enemies
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jsr move_laser
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;========================
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; increment frame count
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;========================
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inc FRAMEL
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bne no_frame_oflo
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inc FRAMEH
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no_frame_oflo:
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;===========================
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; check end of level
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;===========================
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lda LEVEL_OVER
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beq do_keen_loop
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jmp done_with_keen
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do_keen_loop:
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; delay
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; lda #200
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; jsr WAIT
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jmp keen_loop
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done_with_keen:
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bit KEYRESET ; clear keypress
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lda #LOAD_TITLE
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sta WHICH_LOAD
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rts ; exit back
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;==========================
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; includes
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;==========================
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; level graphics
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level1_bg_zx02:
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.incbin "graphics/level1_bg.gr.zx02"
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.include "text_print.s"
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.include "gr_offsets.s"
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.include "gr_fast_clear.s"
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.include "gr_copy.s"
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.include "gr_pageflip.s"
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.include "gr_putsprite_crop.s"
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.include "zx02_optim.s"
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.include "status_bar.s"
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.include "keyboard.s"
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.include "joystick.s"
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.include "text_drawbox.s"
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.include "print_help.s"
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.include "quit_yn.s"
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.include "level_end.s"
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.include "draw_keen.s"
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.include "sprites/keen_sprites.inc"
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.include "move_keen.s"
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.include "handle_laser.s"
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.include "draw_tilemap.s"
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.include "enemies_level1.s"
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.include "actions_level1.s"
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.include "item_level1.s"
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.include "sound_effects.s"
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.include "speaker_tone.s"
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level1_data_zx02:
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.incbin "maps/level1_map.zx02"
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