216 lines
3.3 KiB
ArmAsm
216 lines
3.3 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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MAX_TILE_X = 96 ; 116 - 20
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MAX_TILE_Y = 5 ; (34 - 24)/2 (maybe?)
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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 PAGE1
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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 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 KEEN_FALLING
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sta KEEN_SHOOTING
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sta KEYCARDS
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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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lda #4
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sta DRAW_PAGE
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; Level 1
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; start at 2,24 (remember tiles 2 bytes high even though 4 pixels)
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; but with reference to starting tilemap (0,5) should be
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; 2,8?
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lda #2
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sta KEEN_X
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lda #24
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sta KEEN_Y
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lda #1
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sta KEEN_DIRECTION
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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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; we copy in full screen, 40x48 = 20x12 tiles
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; we start out assuming position is 0,5
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lda #0
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sta TILEMAP_X
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lda #5
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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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; 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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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_MARS
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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_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 "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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