mirror of
https://github.com/deater/dos33fsprogs.git
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274 lines
3.7 KiB
ArmAsm
274 lines
3.7 KiB
ArmAsm
; Riven -- Alcove
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; by deater (Vince Weaver) <vince@deater.net>
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; Zero Page
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.include "../zp.inc"
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.include "../hardware.inc"
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.include "../common_defines.inc"
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.include "../qload.inc"
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.include "disk02_defines.inc"
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alcove_start:
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;===================
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; init screen
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;===================
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; jsr TEXT
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; jsr HOME
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bit KEYRESET
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bit SET_GR
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bit PAGE1
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bit HIRES
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bit FULLGR
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;===============================
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; load sound into language card
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;===============================
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lda SOUND_STATUS
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and #SOUND_IN_LC
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beq do_not_load_audio
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; load sounds into LC
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; read ram, write ram, use $d000 bank1
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bit $C08B
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bit $C08B
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lda #<rotate_audio
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sta ZX0_src
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lda #>rotate_audio
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sta ZX0_src+1
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lda #$D0 ; decompress to $D000
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jsr full_decomp
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; read rom, nowrite, use $d000 bank1
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bit $C08A
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do_not_load_audio:
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;========================
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; set up location
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;========================
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lda #<locations
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sta LOCATIONS_L
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lda #>locations
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sta LOCATIONS_H
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lda #0
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sta DRAW_PAGE
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sta LEVEL_OVER
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lda #0
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sta JOYSTICK_ENABLED
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sta UPDATE_POINTER
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lda #1
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sta CURSOR_VISIBLE
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lda #20
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sta CURSOR_X
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sta CURSOR_Y
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;===================================
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; init
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;===================================
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jsr update_exit ; update rotation
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jsr change_location
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jsr save_bg_14x14 ; save old bg
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game_loop:
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;===================================
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; draw pointer
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;===================================
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jsr draw_pointer
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;===================================
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; handle keypress/joystick
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;===================================
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jsr handle_keypress
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;===================================
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; increment frame count
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;===================================
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inc FRAMEL
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bne frame_no_oflo
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inc FRAMEH
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frame_no_oflo:
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;====================================
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; check level over
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;====================================
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lda LEVEL_OVER
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bne really_exit
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jmp game_loop
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really_exit:
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rts
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;==========================
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; update exit
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;==========================
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update_exit:
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ldx ROOM_ROTATION
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lda room_bg_l,X
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sta location0+14
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lda room_bg_h,X
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sta location0+15
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lda room_exits,X
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sta location0+3
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rts
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; rotates clockwise
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room_bg_l:
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.byte <alcove_w_zx02 ; opening
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.byte <alcove3_w_zx02 ; blocked
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.byte <alcove3_w_zx02 ; blocked
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.byte <alcove_w_zx02 ; opening
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.byte <alcove3_w_zx02 ; blocked
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room_bg_h:
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.byte >alcove_w_zx02 ; opening
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.byte >alcove3_w_zx02 ; blocked
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.byte >alcove3_w_zx02 ; blocked
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.byte >alcove_w_zx02 ; opening
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.byte >alcove3_w_zx02 ; blocked
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room_exits:
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.byte $E3 ; 0
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.byte $FF ; 1
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.byte $FF ; 2
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.byte $E3 ; 3
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.byte $FF ; 4
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;==========================
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; alcove button
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;==========================
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alcove_button:
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; rotate, mod5
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inc ROOM_ROTATION
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lda ROOM_ROTATION
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cmp #5
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bne room_no_wrap
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lda #0
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sta ROOM_ROTATION
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room_no_wrap:
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; update the pointers
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jsr update_exit
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; display "rotation" animation
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lda #<alcove2_w_zx02
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sta ZX0_src
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lda #>alcove2_w_zx02
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sta ZX0_src+1
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lda #$20
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jsr full_decomp
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; only play sound if language card
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lda SOUND_STATUS
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and #SOUND_IN_LC
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bne do_play_audio
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; wait a bit instead
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ldx #20
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jsr wait_50xms
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jmp done_play_audio
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do_play_audio:
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; switch in language card
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; read/write RAM $d000 bank 1
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bit $C08B
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bit $C08B
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; call the btc player
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lda #$00
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sta BTC_L
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lda #$D0
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sta BTC_H
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ldx #45 ; length
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jsr play_audio
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; read ROM/no-write
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bit $c08A ; restore language card
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done_play_audio:
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; re-display exit graphic
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lda location0+14
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sta ZX0_src
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lda location0+15
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sta ZX0_src+1
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lda #$20
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jsr full_decomp
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; TODO: tail call
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rts
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;==========================
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; includes
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;==========================
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.include "graphics_alcove/alcove_graphics.inc"
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.include "leveldata_alcove.inc"
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.include "../audio.s"
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rotate_audio:
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.incbin "audio/rotate.btc.zx02"
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