mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-09-29 08:55:10 +00:00
302 lines
4.4 KiB
ArmAsm
302 lines
4.4 KiB
ArmAsm
; Monkey Title
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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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music_start = $4800
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title_start:
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;===================
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; init screen
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jsr TEXT
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jsr HOME
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bit KEYRESET
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bit SET_GR
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bit PAGE0
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bit LORES
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bit FULLGR
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lda #0
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sta clear_all_color+1
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jsr clear_all
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lda #0
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sta ANIMATE_FRAME
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sta FRAMEL
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sta FRAMEH
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sta DISP_PAGE
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lda #4
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sta DRAW_PAGE
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;====================================
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; load LF logo
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;====================================
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lda #<logo_lzsa
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sta LZSA_SRC_LO
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lda #>logo_lzsa
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sta LZSA_SRC_HI
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lda #$c ; load to page $c00
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jsr decompress_lzsa2_fast
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setup_music:
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; decompress music
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lda #<theme_lzsa
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sta LZSA_SRC_LO
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lda #>theme_lzsa
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sta LZSA_SRC_HI
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lda #$48 ; load to page $4800
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jsr decompress_lzsa2_fast
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jsr mockingboard_detect
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;====================================
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;====================================
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; Main LOGO loop
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;====================================
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;====================================
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logo_loop:
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; copy over background
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jsr gr_copy_to_current
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; draw sparks
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lda FRAMEH ; only do this once
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bne done_sparks
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ldy #0
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spark_loop:
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lda sparks,Y
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bmi done_sparks
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sta XPOS
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iny
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lda sparks,Y
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sta YPOS
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iny
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; calc which spark
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lda sparks,Y
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sta TEMPY
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sec
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lda FRAMEL
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sbc TEMPY ; negative if too soon
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bmi draw_empty_sprite
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cmp #5 ; over 5 if done
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bcs draw_empty_sprite
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asl
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tax
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lda spark_sprites,X
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sta INL
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lda spark_sprites+1,X
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jmp draw_spark_sprite
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draw_empty_sprite:
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lda #<empty_sprite
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sta INL
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lda #>empty_sprite
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draw_spark_sprite:
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sta INH
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iny
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tya
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pha
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jsr put_sprite_crop
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pla
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tay
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jmp spark_loop
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done_sparks:
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; flip page
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jsr page_flip
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; incrememnt frame
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jsr inc_frame
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; if it's been x seconds then go to next part
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lda FRAMEL
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cmp #$50
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beq do_monkey_loop
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; early escape if keypressed
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lda KEYPRESS
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bpl do_logo_loop
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jmp done_with_title
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do_logo_loop:
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; delay
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lda #200
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jsr WAIT
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jmp logo_loop
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;====================================
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; load Background logo
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;====================================
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do_monkey_loop:
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lda #<title_lzsa
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sta LZSA_SRC_LO
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lda #>title_lzsa
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sta LZSA_SRC_HI
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lda #$c ; load to page $c00
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jsr decompress_lzsa2_fast
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monkey_loop:
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jsr gr_copy_to_current
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jsr page_flip
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; early escape if end of song
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lda DONE_PLAYING
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bmi done_with_title
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; early escape if keypressed
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lda KEYPRESS
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bpl loop_again
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jmp done_with_title
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loop_again:
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jmp monkey_loop
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;==========================
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; turn off music
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;==========================
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done_with_title:
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bit KEYRESET ; clear keypress
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sei ; clear interrupts
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jsr clear_ay_both ; silence ay-3-8910 chips
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;==========================
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; load main program
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;==========================
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lda #LOAD_MONKEY
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sta WHICH_LOAD
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rts
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;==========================
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; includes
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;==========================
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; level graphics
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.include "graphics_intro/title_graphics.inc"
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.include "text_print.s"
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.include "gr_offsets.s"
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.include "gr_fast_clear.s"
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.include "gr_copy.s"
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.include "gr_putsprite_crop.s"
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.include "gr_pageflip.s"
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.include "decompress_fast_v2.s"
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.include "ym_play.s"
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.include "interrupt_handler.s"
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.include "mockingboard.s"
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;wait_until_keypressed:
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; lda KEYPRESS
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; bpl wait_until_keypressed
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; bit KEYRESET
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; rts
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;====================================
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; inc frame count
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;====================================
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inc_frame:
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inc FRAMEL
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bne room_frame_no_oflo
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inc FRAMEH
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room_frame_no_oflo:
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rts
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; music is compressed
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; decompressed it is 30720 bytes
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; we decompress to $4800
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; so total size of our code can't be biggr than $2800 = 10k
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theme_lzsa:
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.incbin "music/theme.lzsa"
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spark_sprites:
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.word empty_sprite
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.word spark0_sprite
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.word spark1_sprite
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.word spark2_sprite
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.word spark1_sprite
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.word spark0_sprite
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empty_sprite:
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.byte 1,1
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.byte $AA
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spark0_sprite:
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.byte 3,2
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.byte $AA,$AA,$AA
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.byte $AA,$AF,$AA
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spark1_sprite:
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.byte 3,2
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.byte $AA,$3A,$AA
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.byte $A3,$3F,$A3
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spark2_sprite:
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.byte 3,3
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.byte $AA,$b3,$AA
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.byte $Ab,$bF,$Ab
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.byte $Aa,$a3,$Aa
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; spark locations (grow+shrink)
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sparks:
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; X,Y timestamp
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.byte 0,10, 32 ; first: 0,10
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.byte 3,26, 34 ; second: 3,26
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.byte 6,10, 36 ; third: 6,10
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.byte 6,28, 38 ; 4th 6,28
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.byte 10,14, 40 ; 5th 10,14
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.byte 15,22, 42 ; 6th 15,22
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.byte 19,14, 44 ; 7th 19,14
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.byte 25,24, 46 ; 8th 25,24
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.byte 28,10, 48 ; 9th 28,10
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.byte 32,30, 50 ; 10th 32,30
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.byte 37,10, 52 ; 11th 37,10
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.byte $ff
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