dos33fsprogs/mist/dni.s
Vince Weaver 0359b21d2a mist: dni: can actually beat the game!
still need to hook up the fireplace puzzle
2020-07-19 01:24:28 -04:00

195 lines
2.7 KiB
ArmAsm

; D'NI -- deep beneath New Mexico
; by deater (Vince Weaver) <vince@deater.net>
; Zero Page
.include "zp.inc"
.include "hardware.inc"
.include "common_defines.inc"
.include "common_routines.inc"
dni_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
sta ANIMATE_FRAME
; init cursor
lda #20
sta CURSOR_X
sta CURSOR_Y
; set up initial location
jsr update_game_complete
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
;====================================
; things always happening
lda LOCATION
cmp #DNI_DESK
bne done_foreground
jsr draw_atrus
done_foreground:
;====================================
; handle animations
;====================================
; things only happening when animating
lda LOCATION
cmp #DNI_MIST_BOOK_OPEN
bne nothing_special
animate_mist_book:
lda DIRECTION
cmp #DIRECTION_N
bne done_animate_book
lda ANIMATE_FRAME
cmp #6
bcc mist_book_good ; blt
lda #0
sta ANIMATE_FRAME
mist_book_good:
asl
tay
lda mist_movie,Y
sta INL
lda mist_movie+1,Y
sta INH
lda #24
sta XPOS
lda #12
sta YPOS
jsr put_sprite_crop
lda FRAMEL
and #$f
bne done_animate_book
inc ANIMATE_FRAME
done_animate_book:
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
;==========================
; level graphics
.include "graphics_dni/dni_graphics.inc"
; puzzles
.include "dni_ending.s"
; linking books
.include "link_book_mist.s"
; books
; level data
.include "leveldata_dni.inc"