mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-11-20 03:35:24 +00:00
247 lines
4.2 KiB
ArmAsm
247 lines
4.2 KiB
ArmAsm
.include "zp.inc"
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start:
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;================================
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; include VMW logo line 0
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;================================
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;.byte $AA,$AD,$D5,$AC,$95
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tax ; $aa
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lda $ACD5 ; $ad,$d5,$ac
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sta $0,X ; $95,$00
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;================================
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; Mockingboard detect
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;================================
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jsr mockingboard_detect_slot4 ; call detection routine
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stx MB_DETECTED
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;================================
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; Clear screen and setup graphics
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;================================
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jsr set_gr_page0
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lda #$4
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sta DRAW_PAGE
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; Initialize the 2kB of multiply lookup tables
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jsr init_multiply_tables
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;================================
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; Main Loop
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;================================
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main_loop:
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jsr title_routine
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jsr checkerboard_demo
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jsr island_demo
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jsr star_demo
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jsr star_credits
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jmp main_loop
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;===========================
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; Checkerboard Demo
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;===========================
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checkerboard_demo:
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; initialize
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lda #>sky_background
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sta INH
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lda #<sky_background
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sta INL
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jsr decompress_scroll ; load sky background
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lda #0 ; no draw blue sky
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sta DRAW_BLUE_SKY
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lda #$20 ; setup self-modifying code
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sta nomatch ; to use checkerboard map
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lda #<lookup_checkerboard_map
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sta nomatch+1
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lda #>lookup_checkerboard_map
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sta nomatch+2
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lda #$4c
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sta nomatch+3
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lda #<match
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sta nomatch+4
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lda #>match
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sta nomatch+5
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lda #<checkerboard_flying_directions
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sta direction_smc_1+1
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sta direction_smc_2+1
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lda #>checkerboard_flying_directions
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sta direction_smc_1+2
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sta direction_smc_2+2
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jsr mode7_flying ; call generic mode7 code
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rts
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;===========================
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; Island Demo
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;===========================
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island_demo:
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; initialize
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lda #1
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sta DRAW_BLUE_SKY
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lda #$A5 ; fix the code that was self-modified
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sta nomatch ; away in checkerboard code
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lda #$6A
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sta nomatch+1
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lda #$8D
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sta nomatch+2
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lda #<(spacex_label+1)
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sta nomatch+3
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lda #>(spacex_label+1)
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sta nomatch+4
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lda #$29
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sta nomatch+5
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lda #<island_flying_directions
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sta direction_smc_1+1
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sta direction_smc_2+1
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lda #>island_flying_directions
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sta direction_smc_1+2
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sta direction_smc_2+2
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jsr mode7_flying
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rts
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;===========================
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; Star Demo
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;===========================
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star_demo:
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; initialize
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lda #48
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sta y_limit_smc+1
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jsr starfield_demo
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rts
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;===========================
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; Star Credits
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;===========================
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star_credits:
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; initialize
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lda #40
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sta y_limit_smc+1
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jsr starfield_credits
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rts
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;===========================
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; Title routine
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;===========================
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title_routine:
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bit FULLGR
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jsr clear_screens_notext ; clear top/bottom of page 0/1
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lda #<demo_rle
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sta GBASL
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lda #>demo_rle
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sta GBASH
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; Load offscreen
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lda #<$c00
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sta BASL
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lda #>$c00
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sta BASH
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jsr load_rle_gr
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;==========
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; Fade in
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;==========
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jsr fade_in
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;==========================================
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; Make sure page0 and page1 show same image
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;==========================================
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jsr gr_copy_to_current
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;===================
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; Scroll the message
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;===================
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; Scroll "BY DEATER... A VMW PRODUCTION"
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lda #>deater_scroll
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sta INH
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lda #<deater_scroll
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sta INL
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lda #40 ; scroll at bottom of screen
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sta CV
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jsr gr_scroll
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; Scroll "* APPLE ][ FOREVER *"
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lda #>a2_scroll
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sta INH
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lda #<a2_scroll
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sta INL
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jsr gr_scroll
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;=============
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; Fade out
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;=============
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jsr fade_out
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rts
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;===============================================
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; External modules
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;===============================================
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.include "../asm_routines/gr_unrle.s"
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.include "../asm_routines/gr_fast_clear.s"
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.include "../asm_routines/gr_hlin.s"
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.include "../asm_routines/gr_setpage.s"
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.include "../asm_routines/pageflip.s"
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.include "../asm_routines/gr_fade.s"
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.include "../asm_routines/gr_copy.s"
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.include "../asm_routines/gr_scroll.s"
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.include "../asm_routines/gr_offsets.s"
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.include "../asm_routines/gr_plot.s"
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.include "../asm_routines/text_print.s"
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.include "../asm_routines/mockingboard_a.s"
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.include "mode7.s"
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.include "mode7_demo_backgrounds.inc"
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;===============================================
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; More routines
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;===============================================
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.include "deater.scrolltext"
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.include "a2.scrolltext"
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.include "starfield_demo.s"
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.include "rasterbars.s"
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.include "credits.s"
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