233 lines
3.8 KiB
ArmAsm
233 lines
3.8 KiB
ArmAsm
; VMW Productions 2018 XMAS Demo
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;
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; by deater (Vince Weaver) <vince@deater.net>
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.include "zp.inc"
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.include "hardware.inc"
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xmas2018_start:
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;===================
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; Check for Apple II and patch
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;===================
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; lda $FBB3 ; IIe and newer is $06
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; cmp #6
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; beq apple_iie
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; lda #$54 ;
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; sta ce_patch+1
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apple_iie:
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;===================
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; Init RTS disk code
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;===================
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jsr rts_init
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;===================
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; Load graphics
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;===================
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reload_everything:
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; load WREATH.LZ4 to $a000
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; then decompress it to $2000 (HGR PAGE0)
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lda #<wreath_filename
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sta OUTL
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lda #>wreath_filename
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sta OUTH
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jsr opendir_filename ; open and read entire file into memory
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; size in ldsizeh:ldsizel (f1/f0)
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clc
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lda #<($a000)
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sta LZ4_SRC
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adc ldsizel
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sta LZ4_END
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lda #>($a000)
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sta LZ4_SRC+1
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adc ldsizeh
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sta LZ4_END+1
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; lda #<($a000+4103-8) ; skip checksum at end
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; sta LZ4_END
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; lda #>($a000+4103-8) ; skip checksum at end
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; sta LZ4_END+1
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lda #<$2000
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sta LZ4_DST
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lda #>$2000
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sta LZ4_DST+1
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jsr lz4_decode
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; load MERRY.LZ4 to $4000
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; then decompress it to $6000
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lda #<merry_filename
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sta OUTL
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lda #>merry_filename
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sta OUTH
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jsr opendir_filename ; open and read entire file into memory
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; size in ldsizeh:ldsizel (f1/f0)
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clc
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lda #<($4000)
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sta LZ4_SRC
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adc ldsizel
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sta LZ4_END
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lda #>($4000)
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sta LZ4_SRC+1
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adc ldsizeh
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sta LZ4_END+1
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lda #<$6000
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sta LZ4_DST
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lda #>$6000
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sta LZ4_DST+1
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jsr lz4_decode
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;===================
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; Load music
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;===================
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; load MUSIC.LZ4 to $4000
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lda #<music_filename
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sta OUTL
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lda #>music_filename
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sta OUTH
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jsr opendir_filename ; open and read entire file into memory
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; decompress to $8000
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; decompress from $4000
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; size in ldsizeh:ldsizel (f1/f0)
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clc
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lda #<($4000)
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sta LZ4_SRC
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adc ldsizel
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sta LZ4_END
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lda #>($4000)
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sta LZ4_SRC+1
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adc ldsizeh
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sta LZ4_END+1
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lda #<$8000
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sta LZ4_DST
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lda #>$8000
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sta LZ4_DST+1
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jsr lz4_decode
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; load BALL.IMG to $4000
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lda #<ball_filename
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sta OUTL
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lda #>ball_filename
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sta OUTH
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jsr opendir_filename ; open and read entire file into memory
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;==================
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; Init mockingboard
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;==================
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lda #0
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sta MB_PATTERN
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lda #$0
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sta MB_FRAME
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jsr mockingboard_init
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;===================
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; set graphics mode
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;===================
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jsr HOME
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forever:
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bit PAGE0
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jsr wreath
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jsr ball
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jsr merry
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; wait 5s before restarting
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ldx #20
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wait_at_merry:
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lda #255
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jsr WAIT
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dex
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bne wait_at_merry
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sei ; disable music interrupt
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jsr mockingboard_mute
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jmp reload_everything
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;==================
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; Game over
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;==================
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; we never get here
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;game_over_man:
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; jmp game_over_man
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; Things included here should be aligned
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; as they are called during cycle-counting
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.align $100
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.include "wreath.s"
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.include "gr_putsprite.s"
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.include "gr_offsets.s"
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.include "gr_fast_clear.s"
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.include "vapor_lock.s"
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.align $100
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.include "play_music.s"
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.include "delay_a.s"
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.include "gr_scroll.s"
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.include "mockingboard.s"
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.align $100
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.include "scroll.table"
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.include "ball.s"
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; Things here alignment doesn't matter
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.include "gr_hline.s"
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.include "wait_keypress.s"
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.include "merry.s"
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.include "lz4_decode.s"
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.include "rts.s"
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greets:
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.incbin "greets.raw.lz4t"
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greets_end:
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; filename to open is 30-character Apple text:
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wreath_filename: ; .byte "WREATH.LZ4",0
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.byte 'W'|$80,'R'|$80,'E'|$80,'A'|$80,'T'|$80,'H'|$80,'.'|$80,'L'|$80
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.byte 'Z'|$80,'4'|$80,$00
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merry_filename: ;.byte "MERRY.LZ4",0
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.byte 'M'|$80,'E'|$80,'R'|$80,'R'|$80,'Y'|$80,'.'|$80,'L'|$80,'Z'|$80
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.byte '4'|$80,$00
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ball_filename: ;.byte "BALL.IMG",0
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.byte 'B'|$80,'A'|$80,'L'|$80,'L'|$80,'.'|$80,'I'|$80,'M'|$80,'G'|$80
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.byte $00
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music_filename: ;.byte "MUSIC.LZ4",0
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.byte 'M'|$80,'U'|$80,'S'|$80,'I'|$80,'C'|$80,'.'|$80,'L'|$80,'Z'|$80
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.byte '4'|$80,$0
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