mirror of
https://github.com/deater/dos33fsprogs.git
synced 2025-01-19 15:30:08 +00:00
196 lines
2.5 KiB
ArmAsm
196 lines
2.5 KiB
ArmAsm
; Riven -- Jungle Island -- Stairs
|
|
|
|
; by deater (Vince Weaver) <vince@deater.net>
|
|
|
|
; Zero Page
|
|
.include "../zp.inc"
|
|
.include "../hardware.inc"
|
|
.include "../common_defines.inc"
|
|
.include "../qload.inc"
|
|
.include "disk41_defines.inc"
|
|
|
|
riven_jungle_tunnel2:
|
|
|
|
;===================
|
|
; init screen
|
|
;===================
|
|
|
|
; jsr TEXT
|
|
; jsr HOME
|
|
bit KEYRESET
|
|
|
|
bit SET_GR
|
|
bit PAGE1
|
|
bit HIRES
|
|
bit FULLGR
|
|
|
|
;========================
|
|
; set up location
|
|
;========================
|
|
|
|
lda #<locations
|
|
sta LOCATIONS_L
|
|
lda #>locations
|
|
sta LOCATIONS_H
|
|
|
|
lda #0
|
|
sta DRAW_PAGE
|
|
sta LEVEL_OVER
|
|
|
|
lda #0
|
|
sta JOYSTICK_ENABLED
|
|
sta UPDATE_POINTER
|
|
|
|
lda #1
|
|
sta CURSOR_VISIBLE
|
|
|
|
lda #20
|
|
sta CURSOR_X
|
|
sta CURSOR_Y
|
|
|
|
|
|
|
|
|
|
;===================================
|
|
; init
|
|
;===================================
|
|
|
|
jsr change_location
|
|
|
|
jsr save_bg_14x14 ; save old bg
|
|
|
|
game_loop:
|
|
|
|
;===================================
|
|
; draw pointer
|
|
;===================================
|
|
|
|
jsr draw_pointer
|
|
|
|
;===================================
|
|
; handle keypress/joystick
|
|
;===================================
|
|
|
|
jsr handle_keypress
|
|
|
|
;===================================
|
|
; increment frame count
|
|
;===================================
|
|
|
|
inc FRAMEL
|
|
bne frame_no_oflo
|
|
|
|
inc FRAMEH
|
|
frame_no_oflo:
|
|
|
|
;====================================
|
|
; check level over
|
|
;====================================
|
|
|
|
lda LEVEL_OVER
|
|
bne really_exit
|
|
|
|
jmp game_loop
|
|
|
|
really_exit:
|
|
|
|
rts
|
|
|
|
|
|
;==========================
|
|
; handle split dir
|
|
;==========================
|
|
handle_split_dir1:
|
|
|
|
; if 19 or less, go E
|
|
; if 20, do nothing
|
|
; if 21 or more, go W
|
|
|
|
lda CURSOR_X
|
|
cmp #21
|
|
bcs go_west
|
|
|
|
cmp #19
|
|
bcc go_east
|
|
|
|
rts
|
|
|
|
go_west:
|
|
lda #LOAD_STAIRS
|
|
sta WHICH_LOAD
|
|
|
|
lda #RIVEN_UP1
|
|
sta LOCATION
|
|
|
|
|
|
lda #DIRECTION_W
|
|
bne done_dir ; bra
|
|
|
|
go_east:
|
|
lda #LOAD_COVE
|
|
sta WHICH_LOAD
|
|
|
|
lda #RIVEN_DOWN1
|
|
sta LOCATION
|
|
|
|
lda #DIRECTION_E
|
|
done_dir:
|
|
sta DIRECTION
|
|
|
|
lda #1
|
|
sta LEVEL_OVER
|
|
|
|
rts
|
|
|
|
|
|
;==========================
|
|
; handle split dir2
|
|
;==========================
|
|
handle_split_dir2:
|
|
|
|
; if 14 or less, go N
|
|
; if 15 or more, go E
|
|
|
|
lda CURSOR_X
|
|
cmp #15
|
|
bcs go_east2
|
|
|
|
go_north2:
|
|
lda #LOAD_STAIRS
|
|
sta WHICH_LOAD
|
|
|
|
lda #RIVEN_STAIRS
|
|
sta LOCATION
|
|
|
|
|
|
lda #DIRECTION_N
|
|
bne done_dir2 ; bra
|
|
|
|
go_east2:
|
|
lda #LOAD_COVE
|
|
sta WHICH_LOAD
|
|
|
|
lda #RIVEN_DOWN1
|
|
sta LOCATION
|
|
|
|
lda #DIRECTION_E
|
|
done_dir2:
|
|
sta DIRECTION
|
|
|
|
lda #1
|
|
sta LEVEL_OVER
|
|
|
|
rts
|
|
|
|
|
|
|
|
|
|
;==========================
|
|
; includes
|
|
;==========================
|
|
|
|
|
|
.include "graphics_stairs/stairs_graphics.inc"
|
|
|
|
.include "leveldata_stairs.inc"
|