mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-12-27 02:31:00 +00:00
chitpune: add background rasterbars
This commit is contained in:
Vince Weaver
parent
769ec9e12f
commit
9c7ac6019b
@ -17,6 +17,7 @@ CHIPTUNE_PLAYER: chiptune_player.o
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chiptune_player.o: chiptune_player.s \
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../asm_routines/mockingboard.s \
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../asm_routines/dos33_routines.s \
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rasterbars.s \
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chip_title.inc zp.inc
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ca65 -o chiptune_player.o chiptune_player.s -l chiptune_player.lst
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@ -141,15 +141,12 @@ mockingboard_found:
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;============================
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; Init Background
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;============================
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; jsr clear_screens ; clear top/bottom of page 0/1
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; jsr set_gr_page0
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jsr clear_screens ; clear top/bottom of page 0/1
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jsr set_gr_page0
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; lda #0
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; sta DRAW_PAGE
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; sta RANDOM_POINTER
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; sta SCREEN_Y
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; always multiply with low byte as zero
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; sta NUM2L
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lda #0
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sta DRAW_PAGE
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sta SCREEN_Y
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;============================
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; Loop forever
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@ -158,10 +155,13 @@ playing_loop:
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;============================
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; starfield
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; rasters
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;============================
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; jsr starfield
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jsr clear_top
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jsr draw_rasters
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jsr page_flip
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lda DONE_PLAYING
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beq playing_loop
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@ -270,6 +270,9 @@ done_interrupt:
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.include "../asm_routines/gr_unrle.s"
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.include "../asm_routines/gr_setpage.s"
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.include "../asm_routines/dos33_routines.s"
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.include "../asm_routines/gr_hlin.s"
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.include "rasterbars.s"
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;=======
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; music
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244
chiptune_player/rasterbars.s
Normal file
244
chiptune_player/rasterbars.s
Normal file
@ -0,0 +1,244 @@
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; Not quite a raster-bar, but why not
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;===========
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; CONSTANTS
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;===========
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ELEMENTS EQU 64
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NUM_ROWS EQU 20
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;=====================
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; Rasterbars
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;=====================
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;===========================
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;===========================
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; Main Loop
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;===========================
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;===========================
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draw_rasters:
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; clear rows
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ldy #(NUM_ROWS-1) ; 2
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lda #0 ; 2
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init_rows:
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sta row_color,Y ; 5
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dey ; 2
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bpl init_rows ; 2nt/3
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;================
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; set colors
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lda #COLOR_BOTH_AQUA ; aqua
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ldy SCREEN_Y
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jsr set_row_color
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lda #COLOR_BOTH_MEDIUMBLUE ; medium blue
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jsr set_row_color
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lda #COLOR_BOTH_LIGHTGREEN ; light green
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jsr set_row_color
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lda #COLOR_BOTH_DARKGREEN ; green
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jsr set_row_color
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lda #COLOR_BOTH_YELLOW ; yellow
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jsr set_row_color
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lda #COLOR_BOTH_ORANGE ; orange
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jsr set_row_color
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lda #COLOR_BOTH_PINK ; pink
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jsr set_row_color
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lda #COLOR_BOTH_RED ; red
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jsr set_row_color
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;=================
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; draw rows
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ldy #(NUM_ROWS-1) ; 2
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draw_rows_loop:
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lda row_color,Y ; 5
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beq draw_rows_skip ; skip if black ; 2nt/3
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sta COLOR ; 3
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tya ; 2
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pha ; 3
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asl ; 2
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ldy #39 ; 2
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sty V2 ; 3
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ldy #0 ; 2
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jsr hlin_double ; hlin y,V2 at A ; 63+(X*16)
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pla ; 4
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tay ; 2
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draw_rows_skip:
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dey ; 2
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bpl draw_rows_loop ; 2
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;==================
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; update y pointer
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;==================
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ldy SCREEN_Y
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iny
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cpy #ELEMENTS
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bne not_there
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ldy #0
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not_there:
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sty SCREEN_Y
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rts
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;===================
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;===================
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; set_row_color
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;===================
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;===================
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; color in A
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; Y=offset
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; Y incremented
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; A, X trashed
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set_row_color:
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sta COLOR
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tya ; wrap y offset
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and #(ELEMENTS-1)
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tax
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lda fine_sine,X ; lookup sine value
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; pre-shifted right by 4, sign-extended
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clc
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adc #18 ; add in 18 to center on screen
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sin_no_more:
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pha ; save row value
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jsr put_color ; put color at row
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pla ; restore row value
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clc ; increment row value
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adc #1
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jsr put_color ; put color at row
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iny ; increment for next time
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rts
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;==================
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; put_color
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;==================
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; A = row to set color of
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; A trashed
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put_color:
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clc
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ror ; row/2, with even/odd in carry
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tax ; put row/2 in X
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bcc even_line ; if even, skip to even
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odd_line:
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lda #$f0 ; load mask for odd
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bcs finish_line
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even_line:
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lda #$0f ; load mask for even
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finish_line:
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sta MASK
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and COLOR ; mask off color
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sta COLOR2 ; store for later
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lda MASK
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eor #$ff ; invert mask
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and row_color,X ; load existing color
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ora COLOR2 ; combine
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sta row_color,X ; store back
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rts
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;======================
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; some arrays
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;======================
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row_color:
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.byte $00,$00,$00,$00,$00, $00,$00,$00,$00,$00
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.byte $00,$00,$00,$00,$00, $00,$00,$00,$00,$00
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; arithmatically shifted right by 4
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; FIXME: exploit symmetry and get rid of 3/4 of this table
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; possibly not worth the extra code
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fine_sine:
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.byte $00 ; 0.000000
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.byte $01 ; 0.098017
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.byte $03 ; 0.195090
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.byte $04 ; 0.290285
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.byte $06 ; 0.382683
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.byte $07 ; 0.471397
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.byte $08 ; 0.555570
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.byte $0A ; 0.634393
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.byte $0B ; 0.707107
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.byte $0C ; 0.773010
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.byte $0D ; 0.831470
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.byte $0E ; 0.881921
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.byte $0E ; 0.923880
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.byte $0F ; 0.956940
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.byte $0F ; 0.980785
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.byte $0F ; 0.995185
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.byte $0F ; 1.000000
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.byte $0F ; 0.995185
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.byte $0F ; 0.980785
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.byte $0F ; 0.956940
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.byte $0E ; 0.923880
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.byte $0E ; 0.881921
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.byte $0D ; 0.831470
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.byte $0C ; 0.773010
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.byte $0B ; 0.707107
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.byte $0A ; 0.634393
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.byte $08 ; 0.555570
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.byte $07 ; 0.471397
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.byte $06 ; 0.382683
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.byte $04 ; 0.290285
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.byte $03 ; 0.195090
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.byte $01 ; 0.098017
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.byte $00 ; 0.000000
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.byte $FE ; -0.098017
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.byte $FC ; -0.195090
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.byte $FB ; -0.290285
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.byte $F9 ; -0.382683
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.byte $F8 ; -0.471397
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.byte $F7 ; -0.555570
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.byte $F5 ; -0.634393
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.byte $F4 ; -0.707107
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.byte $F3 ; -0.773010
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.byte $F2 ; -0.831470
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.byte $F1 ; -0.881921
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.byte $F1 ; -0.923880
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.byte $F0 ; -0.956940
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.byte $F0 ; -0.980785
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.byte $F0 ; -0.995185
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.byte $F0 ; -1.000000
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.byte $F0 ; -0.995185
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.byte $F0 ; -0.980785
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.byte $F0 ; -0.956940
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.byte $F1 ; -0.923880
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.byte $F1 ; -0.881921
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.byte $F2 ; -0.831470
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.byte $F3 ; -0.773010
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.byte $F4 ; -0.707107
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.byte $F5 ; -0.634393
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.byte $F7 ; -0.555570
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.byte $F8 ; -0.471397
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.byte $F9 ; -0.382683
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.byte $FB ; -0.290285
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.byte $FC ; -0.195090
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.byte $FE ; -0.098017
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@ -2,18 +2,18 @@
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;; Zero page monitor routines addresses
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;WNDLFT EQU $20
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;WNDWDTH EQU $21
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;WNDTOP EQU $22
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;WNDBTM EQU $23
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WNDLFT EQU $20
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WNDWDTH EQU $21
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WNDTOP EQU $22
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WNDBTM EQU $23
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CH EQU $24
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CV EQU $25
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GBASL EQU $26
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GBASH EQU $27
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BASL EQU $28
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BASH EQU $29
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;H2 EQU $2C
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;V2 EQU $2D
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H2 EQU $2C
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V2 EQU $2D
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MASK EQU $2E
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COLOR EQU $30
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;INVFLG EQU $32
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@ -27,45 +27,43 @@ DOSBUFL EQU $62
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DOSBUFH EQU $63
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FILEML EQU $64
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FILEMH EQU $65
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;TURNING EQU $60
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;SCREEN_X EQU $61 ; not used?
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SCREEN_Y EQU $62
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;ANGLE EQU $63
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;HORIZ_SCALE_I EQU $64
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;HORIZ_SCALE_F EQU $65
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;FACTOR_I EQU $66
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;FACTOR_F EQU $67
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;DX_I EQU $68
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;DX_F EQU $69
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;SPACEX_I EQU $6A
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;SPACEX_F EQU $6B
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;CX_I EQU $6C
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;CX_F EQU $6D
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;DY_I EQU $6E
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;DY_F EQU $6F
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;ANGLE EQU $63
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;HORIZ_SCALE_I EQU $64
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;HORIZ_SCALE_F EQU $65
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;FACTOR_I EQU $66
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;FACTOR_F EQU $67
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;DX_I EQU $68
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;DX_F EQU $69
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;SPACEX_I EQU $6A
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;SPACEX_F EQU $6B
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;CX_I EQU $6C
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;CX_F EQU $6D
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;DY_I EQU $6E
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;DY_F EQU $6F
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;SPACEY_I EQU $70
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;SPACEY_F EQU $71
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;CY_I EQU $72
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;CY_F EQU $73
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;TEMP_I EQU $74
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;TEMP_F EQU $75
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;DISTANCE_I EQU $76
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;DISTANCE_F EQU $77
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;SPACEZ_I EQU $78
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;SPACEZ_F EQU $79
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;DRAW_SPLASH EQU $7A
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;SPEED EQU $7B
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;SPLASH_COUNT EQU $7C
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;SPACEY_I EQU $70
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;SPACEY_F EQU $71
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;CY_I EQU $72
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;CY_F EQU $73
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;TEMP_I EQU $74
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;TEMP_F EQU $75
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;DISTANCE_I EQU $76
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;DISTANCE_F EQU $77
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;SPACEZ_I EQU $78
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;SPACEZ_F EQU $79
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;DRAW_SPLASH EQU $7A
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;SPEED EQU $7B
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;SPLASH_COUNT EQU $7C
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;OVER_LAND EQU $7D
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NUM1L EQU $7E
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NUM1H EQU $7F
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NUM2L EQU $80
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NUM2H EQU $81
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RESULT EQU $82 ; 83,84,85
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;NUM1L EQU $7E
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;NUM1H EQU $7F
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;NUM2L EQU $80
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;NUM2H EQU $81
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;RESULT EQU $82 ; 83,84,85
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;NEGATE EQU $86 ; UNUSED?
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;LAST_SPACEX_I EQU $87
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;LAST_SPACEY_I EQU $88
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@ -95,7 +93,7 @@ MB_FRAME_DIFF EQU $94
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; we try not to conflict with anything DOS, MONITOR or BASIC related
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;COLOR1 EQU $E0
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;COLOR2 EQU $E1
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COLOR2 EQU $E1
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;MATCH EQU $E2
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XX EQU $E3
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;YY EQU $E4
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@ -119,7 +117,7 @@ YPOS EQU $F4
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TEMP EQU $FA
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;RUN EQU $FA
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;TEMP2 EQU $FB
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;TEMPY EQU $FB
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TEMPY EQU $FB
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INL EQU $FC
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INH EQU $FD
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OUTL EQU $FE
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@ -127,10 +125,6 @@ OUTH EQU $FF
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KEYPRESS EQU $C000
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KEYRESET EQU $C010
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