170 lines
2.2 KiB
ArmAsm
170 lines
2.2 KiB
ArmAsm
; Vertical scroll lo-res
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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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NIBCOUNT = $09
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; 5529 original
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; 3283 using LZSA instead
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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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; GR part
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bit PAGE1
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bit LORES ; 4
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bit SET_GR ; 4
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bit FULLGR ; 4
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;===================
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; init vars
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lda #0
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sta DRAW_PAGE
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lda #4
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sta DISP_PAGE
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;=============================
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; Load spaceman top
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; lda #<spaceman_rle
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; sta GBASL
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; lda #>spaceman_rle
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; sta GBASH
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; lda #$90
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; jsr load_rle_large
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lda #<spaceman_lzsa
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sta getsrc_smc+1
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lda #>spaceman_lzsa
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sta getsrc_smc+2
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lda #$90
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jsr decompress_lzsa2_fast
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; Load spaceman bottom
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; lda #<spaceman2_rle
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; sta GBASL
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; lda #>spaceman2_rle
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; sta GBASH
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; lda #$A0
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; jsr load_rle_large
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lda #<spaceman2_lzsa
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sta getsrc_smc+1
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lda #>spaceman2_lzsa
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sta getsrc_smc+2
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lda #$a0
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jsr decompress_lzsa2_fast
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rescroll:
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lda #0
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sta SCROLL_COUNT
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lda #<$9000
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sta TINL
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lda #>$9000
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sta TINH
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lda #<$A000
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sta BINL
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lda #>$A000
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sta BINH
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; delay
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lda #200
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jsr WAIT
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scroll_loop:
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lda TINL
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sta OUTL
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lda TINH
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sta OUTH
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jsr gr_copy_to_current_large ; copy to page1
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jsr page_flip
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lda #100
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jsr WAIT
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lda BINL
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sta OUTL
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lda BINH
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sta OUTH
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jsr gr_copy_to_current_large ; copy to page1
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jsr page_flip
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lda #100
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jsr WAIT
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lda TINL ; inc to next line
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clc
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adc #$28
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sta TINL
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lda TINH
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adc #$0
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sta TINH
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lda BINL ; inc to next line
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clc
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adc #$28
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sta BINL
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lda BINH
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adc #$0
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sta BINH
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inc SCROLL_COUNT
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lda SCROLL_COUNT
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cmp #73
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bne scroll_loop
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jsr wait_until_keypress
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jmp rescroll
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forever:
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jmp forever
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wait_until_keypress:
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lda KEYPRESS
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bpl wait_until_keypress
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bit KEYRESET
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rts
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; .include "gr_unrle.s"
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; .include "gr_unrle_large.s"
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.include "decompress_fast_v2.s"
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.include "gr_offsets.s"
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; .include "gr_copy.s"
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.include "gr_copy_large.s"
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.include "gr_pageflip.s"
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; .include "spaceman.inc"
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; .include "spaceman2.inc"
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spaceman_lzsa:
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.incbin "spaceman.lzsa"
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spaceman2_lzsa:
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.incbin "spaceman2.lzsa"
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