dos33fsprogs/mist/generator.s
2020-08-01 01:43:41 -04:00

147 lines
2.3 KiB
ArmAsm

; Generator, deep under Myst Island
; by deater (Vince Weaver) <vince@deater.net>
; Zero Page
.include "zp.inc"
.include "hardware.inc"
.include "common_defines.inc"
.include "common_routines.inc"
generator_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
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
;====================================
; handle generator puzzle
lda LOCATION
cmp #GEN_TOWER1_TOP
bne location_generator
jsr draw_circuit_breaker
jmp nothing_special
location_generator:
cmp #GEN_GENERATOR_ROOM
bne nothing_special
lda DIRECTION
and #$f
cmp #DIRECTION_N
bne nothing_special
jsr generator_update_volts
jsr generator_draw_buttons
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
;==========================
; includes
;==========================
; graphics data
.include "graphics_generator/generator_graphics.inc"
; puzzles
.include "generator_puzzle.s"
; level data
.include "leveldata_generator.inc"
; sound
.include "simple_sounds.s"