dos33fsprogs/games/mist/ship.s

192 lines
2.7 KiB
ArmAsm
Raw Normal View History

; The Ship on Mist Island
; by deater (Vince Weaver) <vince@deater.net>
; Zero Page
.include "zp.inc"
.include "hardware.inc"
.include "common_defines.inc"
.include "common_routines.inc"
ship_start:
;===================
; init screen
jsr TEXT
jsr HOME
bit KEYRESET
bit SET_GR
bit PAGE0
bit LORES
bit FULLGR
;=================
; set up location
;=================
lda #<locations
sta LOCATIONS_L
lda #>locations
sta LOCATIONS_H
lda #0
sta DRAW_PAGE
sta LEVEL_OVER
; init cursor
lda #20
sta CURSOR_X
sta CURSOR_Y
; set up initial location
jsr change_location
lda #1
sta CURSOR_VISIBLE ; visible at first
lda #0
sta ANIMATE_FRAME
game_loop:
;=================
; reset things
;=================
lda #0
sta IN_SPECIAL
sta IN_RIGHT
sta IN_LEFT
;====================================
; copy background to current page
;====================================
jsr gr_copy_to_current
;====================================
; handle special-case forground logic
;====================================
; FIXME: fix gear being open/closed as viewed from ship
lda LOCATION
cmp #SHIP_BOOK_OPEN
beq animate_stoney_book
jmp nothing_special
animate_stoney_book:
jsr do_animate_stoney_book
jmp nothing_special
nothing_special:
;====================================
; draw pointer
;====================================
jsr draw_pointer
;====================================
; page flip
;====================================
jsr page_flip
;====================================
; handle keypress/joystick
;====================================
jsr handle_keypress
;====================================
; inc frame count
;====================================
inc FRAMEL
bne room_frame_no_oflo
inc FRAMEH
room_frame_no_oflo:
;====================================
; check level over
;====================================
lda LEVEL_OVER
bne really_exit
jmp game_loop
really_exit:
jmp end_level
do_animate_stoney_book:
; handle animated linking book
lda ANIMATE_FRAME
asl
tay
lda stoney_movie,Y
sta INL
lda stoney_movie+1,Y
sta INH
lda #22
sta XPOS
lda #12
sta YPOS
jsr put_sprite_crop
lda FRAMEL
and #$f
bne done_animate_book
inc ANIMATE_FRAME
lda ANIMATE_FRAME
cmp #16
bne done_animate_book
lda #0
sta ANIMATE_FRAME
done_animate_book:
rts
back_to_mist:
lda #$ff
sta LEVEL_OVER
lda #MIST_ARRIVAL_DOCK ; the dock
sta LOCATION
lda #DIRECTION_N
sta DIRECTION
lda #LOAD_MIST
sta WHICH_LOAD
rts
;==========================
; includes
;==========================
; level graphics
.include "graphics_ship/ship_graphics.inc"
; linking books
.include "link_book_stoney.s"
; puzzles
; .include "handle_pages.s"
; level data
.include "leveldata_ship.inc"