mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-06-15 16:29:41 +00:00
217 lines
3.6 KiB
ArmAsm
217 lines
3.6 KiB
ArmAsm
; Plasma Tiny
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; originally based on Plasmagoria code by French Touch
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; trying to see how small I can get it
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; note can use $F000 (or similar) for color lookup to get passable
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; effect on fewer bytes
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; 347 bytes -- initial with FAC
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; 343 bytes -- optimize init
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; 340 bytes -- move Table1 + Table2 to zero page
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; 331 bytes -- init not necessary
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; 319 bytes -- inline precalc + display + init lores colors
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; 316 bytes -- fallthrough in make_tiny
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.include "hardware.inc"
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.include "zp.inc"
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;Table1 = $8000
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;Table2 = $8000+64
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lores_colors_fine=$8100
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;======================================
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; start of code
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;======================================
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plasma_tiny:
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jsr HGR ; have table gen appear on hgr page1
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bit FULLGR
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;=================
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; init music
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lda #0
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sta FRAME
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sta WHICH_TRACK
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;===================
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; music Player Setup
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tracker_song = peasant_song
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; assume mockingboard in slot#4
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; inline mockingboard_init
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.include "mockingboard_init.s"
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.include "tracker_init.s"
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cli ; start music
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jsr make_tables
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bit LORES ; set lo-res
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; ============================================================================
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; init lores colors (inline)
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; ============================================================================
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init_lores_colors:
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ldx #0
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ldy #0
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init_lores_colors_loop:
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lda lores_colors_lookup,X
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sta lores_colors_fine,Y
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iny
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sta lores_colors_fine,Y
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iny
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sta lores_colors_fine,Y
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iny
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sta lores_colors_fine,Y
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iny
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beq done_init_lores_colors
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inx
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txa
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and #$f
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tax
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jmp init_lores_colors_loop
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done_init_lores_colors:
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;====================================
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; do plasma
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;====================================
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do_plasma:
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; init
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; lda #02
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; ldx #5
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;init_loop:
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; sta COMPT1,X
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; dex
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; bne init_loop
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BP3:
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; ============================================================================
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; Precalculate some values (inlined)
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; ROUTINES PRE CALCUL
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; ============================================================================
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precalc:
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lda PARAM1 ; self modify various parts
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sta pc_off1+1
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lda PARAM2
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sta pc_off2+1
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lda PARAM3
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sta pc_off3+1
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lda PARAM4
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sta pc_off4+1
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; Table1(X) = sin1(PARAM1+X)+sin2(PARAM1+X)
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; Table2(X) = sin3(PARAM3+X)+sin1(PARAM4+X)
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ldx #$28 ; 40
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pc_b1:
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pc_off1:
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lda sin1
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pc_off2:
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adc sin2
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sta Table1,X
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pc_off3:
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lda sin3
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pc_off4:
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adc sin1
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sta Table2,X
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inc pc_off1+1
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inc pc_off2+1
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inc pc_off3+1
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inc pc_off4+1
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dex
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bpl pc_b1
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inc PARAM1
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inc PARAM1
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dec PARAM2
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inc PARAM3
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dec PARAM4
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; ============================================================================
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; Display Routines
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; ROUTINES AFFICHAGES
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; ============================================================================
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; Display "Normal"
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; AFFICHAGE "NORMAL"
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display_normal:
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ldx #23 ; lines 0-23 lignes 0-23
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display_line_loop:
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txa
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jsr GBASCALC
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ldy #39 ; col 0-39
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lda Table2,X ; setup base sine value for row
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sta display_row_sin_smc+1
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display_col_loop:
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lda Table1,Y ; load in column sine value
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display_row_sin_smc:
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adc #00 ; add in row value
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sta display_lookup_smc+1 ; patch in low byte of lookup
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display_lookup_smc:
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lda lores_colors_fine ; attention: must be aligned
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sta (GBASL),Y
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dey
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bpl display_col_loop
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dex
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bpl display_line_loop
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; ============================================================================
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inc COMPT1
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bne BP3
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dec COMPT2
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bne BP3
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beq do_plasma ; bra
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lores_colors_lookup:
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.byte $00,$88,$55,$99,$ff,$bb,$33,$22,$66,$77,$44,$cc,$ee,$dd,$99,$11
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.include "make_tables.s"
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.include "interrupt_handler.s"
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.include "mockingboard_constants.s"
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.include "zx02_optim.s"
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; graphics
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dsr_big:
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.incbin "graphics/dsr_big.gr.zx02"
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; music
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.include "mA2E_2.s"
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