dos33fsprogs/games/keen/level2_orig.s
2024-04-19 01:41:52 -04:00

288 lines
4.3 KiB
ArmAsm

; Keen PoC Level 2 (First Shrine)
; by deater (Vince Weaver) <vince@deater.net>
; Zero Page
.include "zp.inc"
.include "hardware.inc"
.include "common_defines.inc"
.include "level2_data.inc"
level2_start:
;===================
; init screen
bit KEYRESET
bit SET_GR
bit PAGE1
bit LORES
bit FULLGR
jsr clear_top ; avoid grey stripes at load
;=====================
; init vars
;=====================
lda #0
sta ANIMATE_FRAME
sta FRAMEL
sta FRAMEH
sta KEEN_WALKING
sta KEEN_JUMPING
sta LEVEL_OVER
sta LASER_OUT
sta KEEN_XL
sta KEEN_FALLING
sta KEEN_SHOOTING
sta KEYCARDS
sta ORACLE_SPOKEN
; debug
; lda #9
; sta RAYGUNS
lda #4
sta DRAW_PAGE
; set starting location
lda #START_KEEN_TILEX
sta KEEN_TILEX
lda #START_KEEN_TILEY
sta KEEN_TILEY
lda #0 ; offset from tile location
sta KEEN_X
sta KEEN_Y
lda #RIGHT ; direction
sta KEEN_DIRECTION
;====================================
; load level1 tilemap
;====================================
lda #<level1_data_zx02
sta ZX0_src
lda #>level1_data_zx02
sta ZX0_src+1
lda #$90 ; load to page $9000
jsr full_decomp
;====================================
; copy in tilemap subset
;====================================
; we copy in full screen, 40x48 = 20x12 tiles
; we start out assuming position is 0,5
lda #START_TILEMAP_X
sta TILEMAP_X
lda #START_TILEMAP_Y
sta TILEMAP_Y
jsr copy_tilemap_subset
;====================================
;====================================
; Main loop
;====================================
;====================================
keen_loop:
; draw tilemap
jsr draw_tilemap
; draw enemies
jsr draw_enemies
; draw laser
jsr draw_laser
; draw keen
jsr draw_keen
jsr page_flip
jsr handle_keypress
jsr move_keen
jsr move_enemies
jsr move_laser
;========================
; increment frame count
;========================
inc FRAMEL
bne no_frame_oflo
inc FRAMEH
no_frame_oflo:
;===========================
; check end of level
;===========================
lda LEVEL_OVER
bne done_with_keen
;===========================
; delay
;===========================
; lda #200
; jsr WAIT
jmp keen_loop
done_with_keen:
bit KEYRESET ; clear keypress
; three reasons we could get here
; NEXT_LEVEL = finished level by exiting door
; GAME_OVER = hit ESC and said Y to QUIT
; TOUCHED_ENEMY = touched an enemy
lda LEVEL_OVER
cmp #NEXT_LEVEL
beq level1_levelover
cmp #GAME_OVER
beq level1_gameover
; got here, touched enemy
;============================
; end animation
;============================
lda #1
sta PLAY_END_SOUND
inc KEEN_TILEY ; move down
sec
lda KEEN_TILEX
sbc TILEMAP_X
asl
clc
adc KEEN_X
sta XPOS
sec
lda KEEN_TILEY
sbc TILEMAP_Y
asl
asl
clc
adc KEEN_Y
sta YPOS
level_end_animation:
jsr draw_tilemap
ldx #<keen_sprite_squish
lda #>keen_sprite_squish
stx INL
sta INH
jsr put_sprite_crop
jsr page_flip
lda PLAY_END_SOUND
beq skip_end_sound
ldy #SFX_KEENDIESND
jsr play_sfx
dec PLAY_END_SOUND
skip_end_sound:
lda #50
jsr WAIT
dec YPOS
dec YPOS
bpl level_end_animation
dec KEENS
bpl level1_levelover
level1_gameover:
; mars plays the sound
lda #GAME_OVER
sta LEVEL_OVER
level1_levelover:
lda #LOAD_MARS
sta WHICH_LOAD
rts ; exit back
;==========================
; includes
;==========================
.include "text_print.s"
.include "gr_offsets.s"
.include "gr_fast_clear.s"
.include "gr_pageflip.s"
.include "gr_putsprite_crop.s"
.include "zx02_optim.s"
.include "status_bar.s"
.include "keyboard.s"
.include "joystick.s"
.include "text_drawbox.s"
.include "text_help.s"
.include "text_quit_yn.s"
.include "draw_keen.s"
.include "sprites/keen_sprites.inc"
.include "move_keen.s"
.include "handle_laser.s"
.include "draw_tilemap.s"
.include "level1_enemies.s"
.include "level1_items.s"
.include "level1_sfx.s"
.include "longer_sound.s"
.include "random16.s"
.include "tilemap_lookup.s"
level1_data_zx02:
.incbin "maps/level2_map.zx02"
oracle_message:
; 012345678901234567890123456789012345678
.byte 2,21,"YOU HEAR IN YOUR MIND:",0
.byte 2,22,"IT IS TOO BAD THAT YOU CANNOT READ",0
.byte 2,23,"THE STANDARD GALACTIC ALPHABET, HUMAN",0