dos33fsprogs/mist/viewer.s

170 lines
2.4 KiB
ArmAsm

; Viewer in the room by the dock
; by deater (Vince Weaver) <vince@deater.net>
; Zero Page
.include "zp.inc"
.include "hardware.inc"
.include "common_defines.inc"
.include "common_routines.inc"
viewer_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
;====================================
lda LOCATION
cmp #VIEWER_CONTROL_PANEL
beq control_panel
cmp #VIEWER_POOL_CLOSE
beq look_at_pool
jmp reset_animation
look_at_pool:
jsr display_viewer
jmp nothing_special
control_panel:
jsr display_panel_code
jmp reset_animation
reset_animation:
lda #0
sta ANIMATE_FRAME
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
back_to_mist:
lda #$ff
sta LEVEL_OVER
lda #MIST_ARRIVAL_DOCK ; the dock
sta LOCATION
lda #DIRECTION_E
sta DIRECTION
lda #LOAD_MIST
sta WHICH_LOAD
rts
;==========================
; includes
;==========================
; graphics
.include "graphics_viewer/viewer_graphics.inc"
.include "number_sprites.inc"
; puzzles
.include "viewer_controls.s"
; leveldata
.include "leveldata_viewer.inc"