gr: split off starfield demo
This commit is contained in:
Vince Weaver
parent
f9d6554425
commit
b6e50f80b9
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@ -11,16 +11,13 @@ $(DOS33):
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cd ../../../utils/dos33fs-utils && make
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mode7.dsk: $(DOS33) MODE7_ISLAND MODE7_CHECKERBOARD MODE7_RAINBOW \
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PLOT_TEST RASTERBARS SKY_DEMO \
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STARFIELD_DEMO STARFIELD_1K TEXT_DEMO
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PLOT_TEST RASTERBARS SKY_DEMO TEXT_DEMO
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$(DOS33) -y mode7.dsk BSAVE -a 0x1000 MODE7_ISLAND
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$(DOS33) -y mode7.dsk BSAVE -a 0x1000 MODE7_CHECKERBOARD
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$(DOS33) -y mode7.dsk BSAVE -a 0x1000 MODE7_RAINBOW
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$(DOS33) -y mode7.dsk BSAVE -a 0x1000 PLOT_TEST
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$(DOS33) -y mode7.dsk BSAVE -a 0x1000 RASTERBARS
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$(DOS33) -y mode7.dsk BSAVE -a 0x1000 SKY_DEMO
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$(DOS33) -y mode7.dsk BSAVE -a 0x1000 STARFIELD_DEMO
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$(DOS33) -y mode7.dsk BSAVE -a 0x1000 STARFIELD_1K
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$(DOS33) -y mode7.dsk BSAVE -a 0x1000 TEXT_DEMO
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@ -93,17 +90,6 @@ sky_demo.o: sky_demo.s \
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gr_setpage.s
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ca65 -o sky_demo.o sky_demo.s -l sky_demo.lst
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STARFIELD_DEMO: starfield_demo.o
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ld65 -o STARFIELD_DEMO starfield_demo.o -C ./apple2_1000.inc
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starfield_demo.o: starfield_demo.s \
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gr_scroll.s \
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pageflip.s \
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gr_setpage.s \
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gr_fast_clear.s
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ca65 -o starfield_demo.o starfield_demo.s -l starfield_demo.lst
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RASTERBARS: rasterbars.o
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ld65 -o RASTERBARS rasterbars.o -C ./apple2_1000.inc
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@ -114,18 +100,6 @@ rasterbars.o: rasterbars.s \
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gr_fast_clear.s
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ca65 -o rasterbars.o rasterbars.s -l rasterbars.lst
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STARFIELD_1K: starfield_1k.o
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ld65 -o STARFIELD_1K starfield_1k.o -C ./apple2_1000.inc
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starfield_1k.o: starfield_1k.s \
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gr_scroll.s \
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pageflip.s \
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gr_setpage.s \
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gr_fast_clear.s
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ca65 -o starfield_1k.o starfield_1k.s -l starfield_1k.lst
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TEXT_DEMO: text_demo.o
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ld65 -o TEXT_DEMO text_demo.o -C ./apple2_1000.inc
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@ -151,6 +125,5 @@ background.o: background.c
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clean:
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rm -f *~ *.o scroller background \
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MODE7 MODE7_ISLAND MODE7_CHECKERBOARD MODE7_RAINBOW \
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PLOT_TEST RASTERBARS STARFIELD_DEMO STARFIELD_1K \
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SKY_DEMO TEXT_DEMO *.lst
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PLOT_TEST RASTERBARS SKY_DEMO TEXT_DEMO *.lst
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Binary file not shown.
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@ -0,0 +1,53 @@
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include ../../../Makefile.inc
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DOS33 = ../../../utils/dos33fs-utils/dos33
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PNG2GR = ../../../utils/gr-utils/png2gr
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PNG2RLE = ../../../utils/gr-utils/png2rle
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TOKENIZE = ../../../utils/asoft_basic-utils/tokenize_asoft
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LINKERSCRIPTS = ../../../linker_scripts
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all: starfield.dsk
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$(DOS33):
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cd ../../../utils/dos33fs-utils && make
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starfield.dsk: $(DOS33) HELLO STARFIELD_DEMO STARFIELD_1K
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cp empty.dsk starfield.dsk
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$(DOS33) -y starfield.dsk SAVE A HELLO
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$(DOS33) -y starfield.dsk BSAVE -a 0x1000 STARFIELD_DEMO
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$(DOS33) -y starfield.dsk BSAVE -a 0x1000 STARFIELD_1K
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###
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HELLO: hello.bas
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$(TOKENIZE) < hello.bas > HELLO
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###
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STARFIELD_DEMO: starfield_demo.o
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ld65 -o STARFIELD_DEMO starfield_demo.o -C $(LINKERSCRIPTS)/apple2_1000.inc
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starfield_demo.o: starfield_demo.s \
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gr_scroll.s \
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pageflip.s \
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gr_setpage.s \
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gr_fast_clear.s
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ca65 -o starfield_demo.o starfield_demo.s -l starfield_demo.lst
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###
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STARFIELD_1K: starfield_1k.o
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ld65 -o STARFIELD_1K starfield_1k.o -C $(LINKERSCRIPTS)/apple2_1000.inc
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starfield_1k.o: starfield_1k.s \
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gr_scroll.s \
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pageflip.s \
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gr_setpage.s \
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gr_fast_clear.s
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ca65 -o starfield_1k.o starfield_1k.s -l starfield_1k.lst
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###
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clean:
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rm -f *~ *.o STARFIELD_DEMO STARFIELD_1K *.lst
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Binary file not shown.
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@ -0,0 +1,193 @@
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clear_screens:
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;===================================
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; Clear top/bottom of page 0
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;===================================
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lda #$0
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sta DRAW_PAGE
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jsr clear_top
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jsr clear_bottom
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;===================================
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; Clear top/bottom of page 1
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;===================================
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lda #$4
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sta DRAW_PAGE
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jsr clear_top
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jsr clear_bottom
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rts
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clear_bottoms:
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;===================================
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; Clear bottom of page 0
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;===================================
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lda #$0
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sta DRAW_PAGE
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jsr clear_bottom
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;===================================
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; Clear bottom of page 1
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;===================================
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lda #$4
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sta DRAW_PAGE
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jsr clear_bottom
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rts
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;=========================================================
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; clear_top
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;=========================================================
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; clear DRAW_PAGE
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; original = 14,558 cycles(?) 15ms, 70Hz
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; OPTIMIZED MAX (page0,48rows): 45*120+4+6 = 5410 = 5.4ms 185Hz
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; (pageX,40rows): 50*120+4+6 = 6010 = 6.0ms 166Hz
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; 50*120+4+6+37 = 6055 = 6.0ms 166Hz
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clear_top:
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lda #0 ; 2
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clear_top_a:
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sta COLOR ; 3
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clc ; 2
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lda DRAW_PAGE ; 3
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adc #4 ; 2
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sta __ctf+2 ; 3
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sta __ctf+5 ; 3
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adc #1 ; 2
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sta __ctf+8 ; 3
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sta __ctf+11 ; 3
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adc #1 ; 2
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sta __ctf2+2 ; 3
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sta __ctf2+5 ; 3
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adc #1 ; 2
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sta __ctf2+8 ; 3
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sta __ctf2+11 ; 3
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ldy #120 ; 2
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lda COLOR ; 3
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clear_top_fast_loop:
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__ctf:
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sta $400,Y ; 5
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sta $480,Y ; 5
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sta $500,Y ; 5
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sta $580,Y ; 5
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cpy #80 ; 2
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bpl no_draw_bottom ; 2nt/3
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__ctf2:
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sta $600,Y ; 5
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sta $680,Y ; 5
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sta $700,Y ; 5
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sta $780,Y ; 5
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no_draw_bottom:
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dey ; 2
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bpl clear_top_fast_loop ; 2nt/3
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rts ; 6
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;=========================================================
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; clear_bottom
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;=========================================================
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; clear bottom of draw page
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clear_bottom:
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clc ; 2
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lda DRAW_PAGE ; 3
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adc #6 ; 2
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sta __cbf2+2 ; 3
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sta __cbf2+5 ; 3
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adc #1 ; 2
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sta __cbf2+8 ; 3
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sta __cbf2+11 ; 3
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ldy #120 ; 2
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lda #$a0 ; Normal Space ; 2
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clear_bottom_fast_loop:
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__cbf2:
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sta $600,Y ; 5
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sta $680,Y ; 5
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sta $700,Y ; 5
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sta $780,Y ; 5
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dey ; 2
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cpy #80 ; 2
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bpl clear_bottom_fast_loop ; 2nt/3
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rts ; 6
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clear_screens_notext:
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;===================================
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; Clear top/bottom of page 0
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;===================================
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lda #$0
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sta DRAW_PAGE
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jsr clear_all
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;===================================
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; Clear top/bottom of page 1
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;===================================
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lda #$4
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sta DRAW_PAGE
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jsr clear_all
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rts
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;=========================================================
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; clear_all
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;=========================================================
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; clear 48 rows
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; clear color: clear_all_color+1
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clear_all:
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clc ; 2
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lda DRAW_PAGE ; 3
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adc #4 ; 2
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sta __caf+2 ; 3
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sta __caf+5 ; 3
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adc #1 ; 2
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sta __caf+8 ; 3
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sta __caf+11 ; 3
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adc #1 ; 2
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sta __caf2+2 ; 3
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sta __caf2+5 ; 3
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adc #1 ; 2
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sta __caf2+8 ; 3
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sta __caf2+11 ; 3
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ldy #120 ; 2
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clear_all_color:
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lda #0 ; 2
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clear_all_fast_loop:
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__caf:
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sta $400,Y ; 5
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sta $480,Y ; 5
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sta $500,Y ; 5
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sta $580,Y ; 5
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__caf2:
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sta $600,Y ; 5
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sta $680,Y ; 5
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sta $700,Y ; 5
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sta $780,Y ; 5
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dey ; 2
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bpl clear_all_fast_loop ; 2nt/3
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rts ; 6
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@ -0,0 +1,5 @@
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; move these to zero page for slight speed increase?
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gr_offsets:
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.word $400,$480,$500,$580,$600,$680,$700,$780
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.word $428,$4a8,$528,$5a8,$628,$6a8,$728,$7a8
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.word $450,$4d0,$550,$5d0,$650,$6d0,$750,$7d0
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@ -0,0 +1,48 @@
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;================================
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; plot routine
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;================================
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; Xcoord in XPOS
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; Ycoord in YPOS
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; color in COLOR
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plot:
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lda YPOS ; 2
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lsr ; shift bottom bit into carry ; 2
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bcc plot_even ; 2nt/3
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plot_odd:
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ldx #$f0 ; 2
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bcs plot_c_done ; 2nt/3
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plot_even:
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ldx #$0f ; 2
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plot_c_done:
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stx MASK ; 3
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asl ; shift back (now even) ; 2
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tay
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lda gr_offsets,Y ; lookup low-res memory address ; 4
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clc ; 2
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adc XPOS ; 3
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sta GBASL ; 3
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iny ; 2
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lda gr_offsets,Y ; 4
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adc DRAW_PAGE ; add in draw page offset ; 3
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sta GBASH ; 3
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ldy #0 ; 2
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plot_write:
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lda MASK ; 3
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eor #$ff ; 2
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and (GBASL),Y ; 5
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sta COLOR_MASK ; 3
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lda COLOR ; 3
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and MASK ; 3
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ora COLOR_MASK ; 3
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sta (GBASL),Y ; 5
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rts ; 6
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@ -0,0 +1,101 @@
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;=============================================
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; put_sprite
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;=============================================
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; Sprite to display in INH,INL
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; Location is XPOS,YPOS
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; Note, only works if YPOS is multiple of two?
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put_sprite:
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ldy #0 ; byte 0 is xsize ; 2
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lda (INL),Y ; 5
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sta CH ; xsize is in CH ; 3
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iny ; 2
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lda (INL),Y ; byte 1 is ysize ; 5
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sta CV ; ysize is in CV ; 3
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iny ; 2
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lda YPOS ; make a copy of ypos ; 3
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sta TEMPY ; as we modify it ; 3
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;===========
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; 28
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put_sprite_loop:
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sty TEMP ; save sprite pointer ; 3
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ldy TEMPY ; 3
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lda gr_offsets,Y ; lookup low-res memory address ; 5
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clc ; 2
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adc XPOS ; add in xpos ; 3
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sta OUTL ; store out low byte of addy ; 3
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lda gr_offsets+1,Y ; look up high byte ; 5
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adc DRAW_PAGE ; ; 3
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sta OUTH ; and store it out ; 3
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ldy TEMP ; restore sprite pointer ; 3
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; OUTH:OUTL now points at right place
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ldx CH ; load xsize into x ; 3
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;===========
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; 36
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put_sprite_pixel:
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lda (INL),Y ; get sprite colors ; 5
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iny ; increment sprite pointer ; 2
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sty TEMP ; save sprite pointer ; 3
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ldy #$0 ; 2
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; check if completely transparent
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; if so, skip
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cmp #$0 ; if all zero, transparent ; 2
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beq put_sprite_done_draw ; don't draw it ; 2nt/3
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; FIXME: use BIT? ;==============
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; 17
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sta COLOR ; save color for later ; 3
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; check if top pixel transparent
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and #$f0 ; check if top nibble zero ; 2
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bne put_sprite_bottom ; if not skip ahead ; 2nt/3
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lda #$f0 ; setup mask ; 2
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sta MASK ; 3
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bmi put_sprite_mask ; 2nt/3
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put_sprite_bottom:
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lda COLOR ; re-load color ; 3
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and #$0f ; check if bottom nibble zero ; 2
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bne put_sprite_all ; if not, skip ahead ; 2nt/3
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lda #$0f ; 2
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sta MASK ; setup mask ; 3
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put_sprite_mask:
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lda (OUTL),Y ; get color at output ; 5
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and MASK ; mask off unneeded part ; 3
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ora COLOR ; or the color in ; 3
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sta (OUTL),Y ; store it back ; 5
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jmp put_sprite_done_draw ; we are done ; 3
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put_sprite_all:
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lda COLOR ; load color ; 3
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sta (OUTL),Y ; and write it out ; 5
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put_sprite_done_draw:
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ldy TEMP ; restore sprite pointer ; 3
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inc OUTL ; increment output pointer ; 5
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dex ; decrement x counter ; 2
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bne put_sprite_pixel ; if not done, keep looping ; 2nt/3
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inc TEMPY ; each line has two y vars ; 5
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inc TEMPY ; 5
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dec CV ; decemenet total y count ; 5
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bne put_sprite_loop ; loop if not done ; 2nt/3
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rts ; return ; 6
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@ -0,0 +1,195 @@
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.ifndef scroll_row1
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scroll_row1 EQU $8A00
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scroll_row2 EQU $8B00
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scroll_row3 EQU $8C00
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scroll_row4 EQU $8D00
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.endif
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SCROLL_LENGTH EQU $61
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OFFSET EQU $62
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;========================
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; scroll some text
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;========================
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; RLE compressed data in INL/INH
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; CV is Y position to display at
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gr_scroll:
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lda #0
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sta OFFSET
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;=======================
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; decompress scroll text
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;=======================
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jsr decompress_scroll
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scroll_loop:
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ldx #0
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ldy CV
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lsr
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lda gr_offsets,Y ; get position
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sta sm1+1
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lda gr_offsets+2,Y ; get position
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sta sm2+1
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lda gr_offsets+4,Y ; get position
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sta sm3+1
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lda gr_offsets+6,Y ; get position
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sta sm4+1
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iny
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clc
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lda gr_offsets,Y ; get position
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adc DRAW_PAGE
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sta sm1+2
|
||||
lda gr_offsets+2,Y ; get position
|
||||
adc DRAW_PAGE
|
||||
sta sm2+2
|
||||
lda gr_offsets+4,Y ; get position
|
||||
adc DRAW_PAGE
|
||||
sta sm3+2
|
||||
lda gr_offsets+6,Y ; get position
|
||||
adc DRAW_PAGE
|
||||
sta sm4+2
|
||||
|
||||
ldy OFFSET
|
||||
|
||||
draw_loop:
|
||||
|
||||
lda scroll_row1,Y
|
||||
sm1:
|
||||
sta $400,X
|
||||
|
||||
lda scroll_row2,Y
|
||||
sm2:
|
||||
sta $480,X
|
||||
|
||||
lda scroll_row3,Y
|
||||
sm3:
|
||||
sta $500,X
|
||||
|
||||
lda scroll_row4,Y
|
||||
sm4:
|
||||
sta $580,X
|
||||
|
||||
iny
|
||||
inx
|
||||
cpx #40
|
||||
bne draw_loop
|
||||
|
||||
;==================
|
||||
; flip pages
|
||||
;==================
|
||||
|
||||
jsr page_flip ; 6
|
||||
|
||||
;==================
|
||||
; delay
|
||||
;==================
|
||||
|
||||
lda #125
|
||||
jsr WAIT
|
||||
|
||||
|
||||
;==================
|
||||
; loop forever
|
||||
;==================
|
||||
clc
|
||||
lda OFFSET
|
||||
adc #40
|
||||
cmp SCROLL_LENGTH
|
||||
beq done_scrolling
|
||||
inc OFFSET
|
||||
jmp scroll_loop ; 3
|
||||
|
||||
done_scrolling:
|
||||
rts
|
||||
|
||||
;=======================
|
||||
; decompress scroll
|
||||
;=======================
|
||||
decompress_scroll:
|
||||
ldy #0
|
||||
jsr scroll_load_and_increment
|
||||
sta SCROLL_LENGTH
|
||||
|
||||
lda #<scroll_row1
|
||||
sta OUTL
|
||||
lda #>scroll_row1
|
||||
sta OUTH
|
||||
|
||||
decompress_scroll_loop:
|
||||
jsr scroll_load_and_increment ; load compressed value
|
||||
|
||||
cmp #$A1 ; EOF marker
|
||||
beq done_decompress_scroll ; if EOF, exit
|
||||
|
||||
pha ; save
|
||||
|
||||
and #$f0 ; mask
|
||||
cmp #$a0 ; see if special AX
|
||||
beq decompress_scroll_special
|
||||
|
||||
pla ; note, PLA sets flags!
|
||||
|
||||
ldx #$1 ; only want to print 1
|
||||
bne decompress_scroll_run
|
||||
|
||||
decompress_scroll_special:
|
||||
pla
|
||||
|
||||
and #$0f ; check if was A0
|
||||
|
||||
bne decompress_scroll_color ; if A0 need to read run, color
|
||||
|
||||
decompress_scroll_large:
|
||||
jsr scroll_load_and_increment ; get run length
|
||||
|
||||
decompress_scroll_color:
|
||||
tax ; put runlen into X
|
||||
jsr scroll_load_and_increment ; get color
|
||||
|
||||
decompress_scroll_run:
|
||||
sta (OUTL),Y
|
||||
pha
|
||||
|
||||
clc ; increment 16-bit pointer
|
||||
lda OUTL
|
||||
adc #$1
|
||||
sta OUTL
|
||||
lda OUTH
|
||||
adc #$0
|
||||
sta OUTH
|
||||
|
||||
pla
|
||||
|
||||
dex ; repeat for X times
|
||||
bne decompress_scroll_run
|
||||
|
||||
beq decompress_scroll_loop ; get next run
|
||||
|
||||
done_decompress_scroll:
|
||||
rts
|
||||
|
||||
|
||||
scroll_load_and_increment:
|
||||
lda (INL),Y ; load and increment 16-bit pointer
|
||||
pha
|
||||
clc
|
||||
lda INL
|
||||
adc #$1
|
||||
sta INL
|
||||
lda INH
|
||||
adc #$0
|
||||
sta INH
|
||||
pla
|
||||
rts
|
||||
|
||||
|
|
@ -0,0 +1,20 @@
|
|||
;==========================================================
|
||||
; set_text_page0
|
||||
;==========================================================
|
||||
;
|
||||
set_text_page0:
|
||||
bit PAGE0 ; set page0
|
||||
bit TEXT ; set text mode
|
||||
rts
|
||||
|
||||
;==========================================================
|
||||
; set_gr_page0
|
||||
;==========================================================
|
||||
;
|
||||
set_gr_page0:
|
||||
bit PAGE0 ; set page 0
|
||||
bit LORES ; Lo-res graphics
|
||||
bit TEXTGR ; mixed gr/text mode
|
||||
bit SET_GR ; set graphics
|
||||
rts
|
||||
|
||||
|
|
@ -0,0 +1,2 @@
|
|||
5 HOME
|
||||
10 PRINT CHR$(4);"CATALOG"
|
||||
|
|
@ -0,0 +1,111 @@
|
|||
|
||||
;==========================================================
|
||||
; Wait until keypressed
|
||||
;==========================================================
|
||||
;
|
||||
|
||||
wait_until_keypressed:
|
||||
lda KEYPRESS ; check if keypressed
|
||||
bpl wait_until_keypressed ; if not, loop
|
||||
jmp figure_out_key
|
||||
|
||||
|
||||
;==========================================================
|
||||
; Get Key
|
||||
;==========================================================
|
||||
;
|
||||
|
||||
get_key:
|
||||
|
||||
check_paddle_button:
|
||||
|
||||
; check for paddle button
|
||||
|
||||
bit PADDLE_BUTTON0 ; 4
|
||||
bpl no_button ; 2nt/3
|
||||
lda #' '+128 ; 2
|
||||
jmp save_key ; 3
|
||||
|
||||
no_button:
|
||||
lda KEYPRESS ; 3
|
||||
bpl no_key ; 2nt/3
|
||||
|
||||
figure_out_key:
|
||||
cmp #' '+128 ; the mask destroys space ; 2
|
||||
beq save_key ; so handle it specially ; 2nt/3
|
||||
|
||||
and #$5f ; mask, to make upper-case ; 2
|
||||
check_right_arrow:
|
||||
cmp #$15 ; 2
|
||||
bne check_left_arrow ; 2nt/3
|
||||
lda #'D' ; 2
|
||||
check_left_arrow:
|
||||
cmp #$08 ; 2
|
||||
bne check_up_arrow ; 2nt/3
|
||||
lda #'A' ; 2
|
||||
check_up_arrow:
|
||||
cmp #$0B ; 2
|
||||
bne check_down_arrow ; 2nt/3
|
||||
lda #'W' ; 2
|
||||
check_down_arrow:
|
||||
cmp #$0A ; 2
|
||||
bne check_escape ; 2nt/3
|
||||
lda #'S' ; 2
|
||||
check_escape:
|
||||
cmp #$1B ; 2
|
||||
bne save_key ; 2nt/3
|
||||
lda #'Q' ; 2
|
||||
jmp save_key ; 3
|
||||
|
||||
no_key:
|
||||
bit PADDLE_STATUS ; 3
|
||||
bpl no_key_store ; 2nt/3
|
||||
|
||||
; check for paddle action
|
||||
; code from http://web.pdx.edu/~heiss/technotes/aiie/tn.aiie.06.html
|
||||
|
||||
inc PADDLE_STATUS ; 5
|
||||
lda PADDLE_STATUS ; 3
|
||||
and #$03 ; 2
|
||||
beq check_paddles ; 2nt/3
|
||||
jmp no_key_store ; 3
|
||||
|
||||
check_paddles:
|
||||
lda PADDLE_STATUS ; 3
|
||||
and #$80 ; 2
|
||||
sta PADDLE_STATUS ; 3
|
||||
|
||||
ldx #$0 ; 2
|
||||
LDA PTRIG ;TRIGGER PADDLES ; 4
|
||||
LDY #0 ;INIT COUNTER ; 2
|
||||
NOP ;COMPENSATE FOR 1ST COUNT ; 2
|
||||
NOP ; 2
|
||||
PREAD2: LDA PADDL0,X ;COUNT EVERY 11 uSEC. ; 4
|
||||
BPL RTS2D ;BRANCH WHEN TIMED OUT ; 2nt/3
|
||||
INY ;INCREMENT COUNTER ; 2
|
||||
BNE PREAD2 ;CONTINUE COUNTING ; 2nt/3
|
||||
DEY ;COUNTER OVERFLOWED ; 2
|
||||
RTS2D: ;RETURN W/VALUE 0-255
|
||||
|
||||
cpy #96 ; 2
|
||||
bmi paddle_left ; 2nt/3
|
||||
cpy #160 ; 2
|
||||
bmi no_key_store ; 2nt/3
|
||||
lda #'D' ; 2
|
||||
jmp save_key ; 3
|
||||
paddle_left:
|
||||
lda #'A' ; 2
|
||||
jmp save_key ; 3
|
||||
|
||||
no_key_store:
|
||||
lda #0 ; no key, so save a zero ; 2
|
||||
|
||||
save_key:
|
||||
sta LASTKEY ; save the key to our buffer ; 2
|
||||
bit KEYRESET ; clear the keyboard buffer ; 4
|
||||
rts ; 6
|
||||
;============
|
||||
; 33=nokey
|
||||
; 48=worstkey
|
||||
|
||||
|
||||
|
|
@ -0,0 +1,351 @@
|
|||
; Fast mutiply
|
||||
|
||||
|
||||
; Note for our purposes we only care about 8.8 x 8.8 fixed point
|
||||
; with 8.8 result, which means we only care about the middle two bytes
|
||||
; of the 32 bit result. So we disable generation of the high and low byte
|
||||
; to save some cycles.
|
||||
|
||||
;
|
||||
; The old routine took around 700 cycles for a 16bitx16bit=32bit mutiply
|
||||
; This routine, at an expense of 2kB of looku tables, takes around 250
|
||||
; If you reuse a term the next time this drops closer to 200
|
||||
|
||||
; This routine was described by Stephen Judd and found
|
||||
; in The Fridge and in the C=Hacking magazine
|
||||
; http://codebase64.org/doku.php?id=base:seriously_fast_multiplication
|
||||
|
||||
; The key thing to note is that
|
||||
; (a+b)^2 (a-b)^2
|
||||
; a*b = ------- - --------
|
||||
; 4 4
|
||||
; So if you have tables of the squares of 0..511 you can lookup and subtract
|
||||
; instead of multiplying.
|
||||
|
||||
; Table generation: I:0..511
|
||||
; square1_lo = <((I*I)/4)
|
||||
; square1_hi = >((I*I)/4)
|
||||
; square2_lo = <(((I-255)*(I-255))/4)
|
||||
; square2_hi = >(((I-255)*(I-255))/4)
|
||||
|
||||
; Note: DOS3.3 starts at $9600
|
||||
|
||||
.ifndef square1_lo
|
||||
square1_lo EQU $8E00
|
||||
square1_hi EQU $9000
|
||||
square2_lo EQU $9200
|
||||
square2_hi EQU $9400
|
||||
.endif
|
||||
|
||||
; for(i=0;i<512;i++) {
|
||||
; square1_lo[i]=((i*i)/4)&0xff;
|
||||
; square1_hi[i]=(((i*i)/4)>>8)&0xff;
|
||||
; square2_lo[i]=( ((i-255)*(i-255))/4)&0xff;
|
||||
; square2_hi[i]=(( ((i-255)*(i-255))/4)>>8)&0xff;
|
||||
; }
|
||||
|
||||
init_multiply_tables:
|
||||
|
||||
; Build the add tables
|
||||
|
||||
ldx #$00
|
||||
txa
|
||||
.byte $c9 ; CMP #immediate - skip TYA and clear carry flag
|
||||
lb1: tya
|
||||
adc #$00 ; 0
|
||||
ml1: sta square1_hi,x ; square1_hi[0]=0
|
||||
tay ; y=0
|
||||
cmp #$40 ; subtract 64 and update flags (c=0)
|
||||
txa ; a=0
|
||||
ror ; rotate
|
||||
ml9: adc #$00 ; add 0
|
||||
sta ml9+1 ; update add value
|
||||
inx ; x=1
|
||||
ml0: sta square1_lo,x ; square1_lo[0]=1
|
||||
bne lb1 ; if not zero, loop
|
||||
inc ml0+2 ; increment values
|
||||
inc ml1+2 ; increment values
|
||||
clc ; c=0
|
||||
iny ; y=1
|
||||
bne lb1 ; loop
|
||||
|
||||
; Build the subtract tables based on the existing one
|
||||
|
||||
ldx #$00
|
||||
ldy #$ff
|
||||
second_table:
|
||||
lda square1_hi+1,x
|
||||
sta square2_hi+$100,x
|
||||
lda square1_hi,x
|
||||
sta square2_hi,y
|
||||
lda square1_lo+1,x
|
||||
sta square2_lo+$100,x
|
||||
lda square1_lo,x
|
||||
sta square2_lo,y
|
||||
dey
|
||||
inx
|
||||
bne second_table
|
||||
|
||||
|
||||
rts
|
||||
|
||||
|
||||
; Fast 16x16 bit unsigned multiplication, 32-bit result
|
||||
; Input: NUM1H:NUM1L * NUM2H:NUM2L
|
||||
; Result: RESULT3:RESULT2:RESULT1:RESULT0
|
||||
;
|
||||
; Does self-modifying code to hard-code NUM1H:NUM1L into the code
|
||||
; carry=0: re-use previous NUM1H:NUM1L
|
||||
; carry=1: reload NUM1H:NUM1L (58 cycles slower)
|
||||
;
|
||||
; clobbered: RESULT, X, A, C
|
||||
; Allocation setup: T1,T2 and RESULT preferably on Zero-page.
|
||||
;
|
||||
; NUM1H (x_i), NUM1L (x_f)
|
||||
; NUM2H (y_i), NUM2L (y_f)
|
||||
|
||||
; NUM1L * NUM2L = AAaa
|
||||
; NUM1L * NUM2H = BBbb
|
||||
; NUM1H * NUM2L = CCcc
|
||||
; NUM1H * NUM2H = DDdd
|
||||
;
|
||||
; AAaa
|
||||
; BBbb
|
||||
; CCcc
|
||||
; + DDdd
|
||||
; ----------
|
||||
; RESULT
|
||||
|
||||
;fixed_16x16_mul_unsigned:
|
||||
|
||||
multiply:
|
||||
|
||||
bcc num1_same_as_last_time ; 2nt/3
|
||||
|
||||
;============================
|
||||
; Set up self-modifying code
|
||||
; this changes the code to be hard-coded to multiply by NUM1H:NUM1L
|
||||
;============================
|
||||
|
||||
lda NUM1L ; load the low byte ; 3
|
||||
sta sm1a+1 ; 3
|
||||
sta sm3a+1 ; 3
|
||||
sta sm5a+1 ; 3
|
||||
sta sm7a+1 ; 3
|
||||
eor #$ff ; invert the bits for subtracting ; 2
|
||||
sta sm2a+1 ; 3
|
||||
sta sm4a+1 ; 3
|
||||
sta sm6a+1 ; 3
|
||||
sta sm8a+1 ; 3
|
||||
lda NUM1H ; load the high byte ; 3
|
||||
sta sm1b+1 ; 3
|
||||
sta sm3b+1 ; 3
|
||||
sta sm5b+1 ; 3
|
||||
; sta sm7b+1 ;
|
||||
eor #$ff ; invert the bits for subtractin ; 2
|
||||
sta sm2b+1 ; 3
|
||||
sta sm4b+1 ; 3
|
||||
sta sm6b+1 ; 3
|
||||
; sta sm8b+1 ;
|
||||
;===========
|
||||
; 52
|
||||
|
||||
num1_same_as_last_time:
|
||||
|
||||
;==========================
|
||||
; Perform NUM1L * NUM2L = AAaa
|
||||
;==========================
|
||||
|
||||
ldx NUM2L ; (low le) ; 3
|
||||
sec ; 2
|
||||
sm1a:
|
||||
lda square1_lo,x ; 4
|
||||
sm2a:
|
||||
sbc square2_lo,x ; 4
|
||||
|
||||
; a is _aa
|
||||
|
||||
; sta RESULT+0 ;
|
||||
|
||||
sm3a:
|
||||
lda square1_hi,x ; 4
|
||||
sm4a:
|
||||
sbc square2_hi,x ; 4
|
||||
; a is _AA
|
||||
sta _AA+1 ; 3
|
||||
;===========
|
||||
; 24
|
||||
|
||||
; Perform NUM1H * NUM2L = CCcc
|
||||
sec ; 2
|
||||
sm1b:
|
||||
lda square1_lo,x ; 4
|
||||
sm2b:
|
||||
sbc square2_lo,x ; 4
|
||||
; a is _cc
|
||||
sta _cc+1 ; 3
|
||||
sm3b:
|
||||
lda square1_hi,x ; 4
|
||||
sm4b:
|
||||
sbc square2_hi,x ; 4
|
||||
; a is _CC
|
||||
sta _CC+1 ; 3
|
||||
;===========
|
||||
; 24
|
||||
|
||||
;==========================
|
||||
; Perform NUM1L * NUM2H = BBbb
|
||||
;==========================
|
||||
ldx NUM2H ; 3
|
||||
sec ; 2
|
||||
sm5a:
|
||||
lda square1_lo,x ; 4
|
||||
sm6a:
|
||||
sbc square2_lo,x ; 4
|
||||
; a is _bb
|
||||
sta _bb+1 ; 3
|
||||
|
||||
sm7a:
|
||||
lda square1_hi,x ; 4
|
||||
sm8a:
|
||||
sbc square2_hi,x ; 4
|
||||
; a is _BB
|
||||
sta _BB+1 ; 3
|
||||
;===========
|
||||
; 27
|
||||
|
||||
;==========================
|
||||
; Perform NUM1H * NUM2H = DDdd
|
||||
;==========================
|
||||
sec ; 2
|
||||
sm5b:
|
||||
lda square1_lo,x ; 4
|
||||
sm6b:
|
||||
sbc square2_lo,x ; 4
|
||||
; a is _dd
|
||||
sta _dd+1 ; 3
|
||||
;sm7b:
|
||||
; lda square1_hi,x ;
|
||||
;sm8b:
|
||||
; sbc square2_hi,x ;
|
||||
; a = _DD
|
||||
; sta RESULT+3 ;
|
||||
;===========
|
||||
; 13
|
||||
|
||||
;===========================================
|
||||
; Add the separate multiplications together
|
||||
;===========================================
|
||||
|
||||
clc ; 2
|
||||
_AA:
|
||||
lda #0 ; loading _AA ; 2
|
||||
_bb:
|
||||
adc #0 ; adding in _bb ; 2
|
||||
sta RESULT+1 ; 3
|
||||
;==========
|
||||
; 9
|
||||
; product[2]=_BB+_CC+c
|
||||
|
||||
_BB:
|
||||
lda #0 ; loading _BB ; 2
|
||||
_CC:
|
||||
adc #0 ; adding in _CC ; 2
|
||||
sta RESULT+2 ; 3
|
||||
;===========
|
||||
; 7
|
||||
|
||||
; product[3]=_DD+c
|
||||
|
||||
; bcc dd_no_carry1 ;
|
||||
; inc RESULT+3 ;
|
||||
clc ; 2
|
||||
;=============
|
||||
; 2
|
||||
dd_no_carry1:
|
||||
|
||||
; product[1]=_AA+_bb+_cc
|
||||
|
||||
_cc:
|
||||
lda #0 ; load _cc ; 2
|
||||
adc RESULT+1 ; 3
|
||||
sta RESULT+1 ; 3
|
||||
|
||||
; product[2]=_BB+_CC+_dd+c
|
||||
|
||||
_dd:
|
||||
lda #0 ; load _dd ; 2
|
||||
adc RESULT+2 ; 3
|
||||
sta RESULT+2 ; 3
|
||||
|
||||
;===========
|
||||
; 16
|
||||
; product[3]=_DD+c
|
||||
|
||||
|
||||
; bcc dd_no_carry2 ;
|
||||
; inc RESULT+3 ;
|
||||
|
||||
;=============
|
||||
; 0
|
||||
|
||||
dd_no_carry2:
|
||||
|
||||
; *z_i=product[1];
|
||||
; *z_f=product[0];
|
||||
|
||||
; rts ; 6
|
||||
|
||||
|
||||
;=================
|
||||
; Signed multiply
|
||||
;=================
|
||||
|
||||
;multiply:
|
||||
|
||||
; jsr fixed_16x16_mul_unsigned ; 6
|
||||
|
||||
lda NUM1H ; x_i ; 3
|
||||
;===========
|
||||
; 12
|
||||
|
||||
|
||||
bpl x_positive ;^3/2nt
|
||||
|
||||
sec ; 2
|
||||
lda RESULT+2 ; 3
|
||||
sbc NUM2L ; 3
|
||||
sta RESULT+2 ; 3
|
||||
; lda RESULT+3 ;
|
||||
; sbc NUM2H ;
|
||||
; sta RESULT+3 ;
|
||||
;============
|
||||
; 10
|
||||
|
||||
x_positive:
|
||||
|
||||
lda NUM2H ; y_i ; 3
|
||||
;============
|
||||
; ; 6
|
||||
|
||||
bpl y_positive ;^3/2nt
|
||||
|
||||
|
||||
sec ; 2
|
||||
lda RESULT+2 ; 3
|
||||
sbc NUM1L ; 3
|
||||
sta RESULT+2 ; 3
|
||||
; lda RESULT+3 ;
|
||||
; sbc NUM1H ;
|
||||
; sta RESULT+3 ;
|
||||
;===========
|
||||
; 10
|
||||
|
||||
y_positive:
|
||||
ldx RESULT+2 ; *z_i=product[2]; ; 3
|
||||
lda RESULT+1 ; *z_f=product[1]; ; 3
|
||||
|
||||
rts ; 6
|
||||
;==========
|
||||
; 12
|
||||
|
||||
|
|
@ -0,0 +1,24 @@
|
|||
;==========
|
||||
; page_flip
|
||||
;==========
|
||||
|
||||
page_flip:
|
||||
lda DISP_PAGE ; 3
|
||||
beq page_flip_show_1 ; 2nt/3
|
||||
page_flip_show_0:
|
||||
bit PAGE0 ; 4
|
||||
lda #4 ; 2
|
||||
sta DRAW_PAGE ; DRAW_PAGE=1 ; 3
|
||||
lda #0 ; 2
|
||||
sta DISP_PAGE ; DISP_PAGE=0 ; 3
|
||||
rts ; 6
|
||||
page_flip_show_1:
|
||||
bit PAGE1 ; 4
|
||||
sta DRAW_PAGE ; DRAW_PAGE=0 ; 3
|
||||
lda #1 ; 2
|
||||
sta DISP_PAGE ; DISP_PAGE=1 ; 3
|
||||
rts ; 6
|
||||
;====================
|
||||
; DISP_PAGE=0 26
|
||||
; DISP_PAGE=1 24
|
||||
|
||||
|
|
@ -0,0 +1,59 @@
|
|||
;================
|
||||
; Ship Sprites
|
||||
;================
|
||||
|
||||
splash_forward:
|
||||
.byte $7,$2
|
||||
.byte $00,$ee,$00,$00,$00,$ee,$00
|
||||
.byte $ee,$00,$00,$00,$00,$00,$ee
|
||||
|
||||
splash_right:
|
||||
.byte $7,$2
|
||||
.byte $00,$00,$00,$00,$00,$ee,$00
|
||||
.byte $00,$00,$00,$00,$00,$00,$ee
|
||||
|
||||
|
||||
splash_left:
|
||||
.byte $7,$2
|
||||
.byte $00,$ee,$00,$00,$00,$00,$00
|
||||
.byte $ee,$00,$00,$00,$00,$00,$00
|
||||
|
||||
shadow_forward:
|
||||
.byte $3,$2
|
||||
.byte $00,$aa,$00
|
||||
.byte $a0,$aa,$a0
|
||||
|
||||
shadow_right:
|
||||
.byte $3,$2
|
||||
.byte $a0,$00,$aa
|
||||
.byte $00,$0a,$a0
|
||||
|
||||
shadow_left:
|
||||
.byte $3,$2
|
||||
.byte $aa,$00,$a0
|
||||
.byte $a0,$0a,$00
|
||||
|
||||
ship_forward:
|
||||
.byte $9,$5
|
||||
.byte $00,$00,$00,$00,$ff,$00,$00,$00,$00
|
||||
.byte $00,$00,$00,$66,$ff,$66,$00,$00,$00
|
||||
.byte $00,$00,$70,$2f,$12,$2f,$70,$00,$00
|
||||
.byte $f0,$f7,$f7,$f2,$d9,$f2,$f7,$f7,$f0
|
||||
.byte $00,$00,$00,$00,$0d,$00,$00,$00,$00
|
||||
|
||||
ship_right:
|
||||
.byte $9,$5
|
||||
.byte $00,$00,$00,$00,$00,$60,$60,$f0,$00
|
||||
.byte $00,$f0,$70,$70,$f6,$f6,$6f,$66,$00
|
||||
.byte $00,$07,$ff,$2f,$12,$27,$f6,$00,$00
|
||||
.byte $00,$00,$00,$dd,$d9,$f2,$77,$00,$00
|
||||
.byte $00,$00,$00,$00,$00,$0f,$ff,$70,$00
|
||||
|
||||
ship_left:
|
||||
.byte $9,$5
|
||||
.byte $00,$f0,$60,$60,$00,$00,$00,$00,$00
|
||||
.byte $00,$66,$6f,$f6,$f6,$70,$70,$f0,$00
|
||||
.byte $00,$00,$f6,$27,$12,$2f,$ff,$07,$00
|
||||
.byte $00,$00,$77,$f2,$d9,$dd,$00,$00,$00
|
||||
.byte $00,$70,$ff,$0f,$00,$00,$00,$00,$00
|
||||
|
||||
Binary file not shown.
|
|
@ -0,0 +1,186 @@
|
|||
.define EQU =
|
||||
|
||||
;; Zero page monitor routines addresses
|
||||
|
||||
WNDLFT EQU $20
|
||||
WNDWDTH EQU $21
|
||||
WNDTOP EQU $22
|
||||
WNDBTM EQU $23
|
||||
CH EQU $24
|
||||
CV EQU $25
|
||||
GBASL EQU $26
|
||||
GBASH EQU $27
|
||||
BASL EQU $28
|
||||
BASH EQU $29
|
||||
H2 EQU $2C
|
||||
V2 EQU $2D
|
||||
MASK EQU $2E
|
||||
COLOR EQU $30
|
||||
INVFLG EQU $32
|
||||
|
||||
; More zero-page addresses
|
||||
; we try not to conflict with anything DOS, MONITOR or BASIC related
|
||||
|
||||
COLOR1 EQU $E0
|
||||
COLOR2 EQU $E1
|
||||
MATCH EQU $E2
|
||||
XX EQU $E3
|
||||
YY EQU $E4
|
||||
YADD EQU $E5
|
||||
LOOP EQU $E6
|
||||
MEMPTRL EQU $E7
|
||||
MEMPTRH EQU $E8
|
||||
NAMEL EQU $E9
|
||||
NAMEH EQU $EA
|
||||
NAMEX EQU $EB
|
||||
CHAR EQU $EC
|
||||
DISP_PAGE EQU $ED
|
||||
DRAW_PAGE EQU $EE
|
||||
|
||||
FIRST EQU $F0
|
||||
LASTKEY EQU $F1
|
||||
PADDLE_STATUS EQU $F2
|
||||
XPOS EQU $F3
|
||||
YPOS EQU $F4
|
||||
TEMP EQU $FA
|
||||
RUN EQU $FA
|
||||
TEMP2 EQU $FB
|
||||
TEMPY EQU $FB
|
||||
INL EQU $FC
|
||||
INH EQU $FD
|
||||
OUTL EQU $FE
|
||||
OUTH EQU $FF
|
||||
|
||||
|
||||
;; Flying Routine Only
|
||||
|
||||
TURNING EQU $60
|
||||
;SCREEN_X EQU $61 ; not used?
|
||||
SCREEN_Y EQU $62
|
||||
ANGLE EQU $63
|
||||
HORIZ_SCALE_I EQU $64
|
||||
HORIZ_SCALE_F EQU $65
|
||||
FACTOR_I EQU $66
|
||||
FACTOR_F EQU $67
|
||||
DX_I EQU $68
|
||||
DX_F EQU $69
|
||||
SPACEX_I EQU $6A
|
||||
SPACEX_F EQU $6B
|
||||
CX_I EQU $6C
|
||||
CX_F EQU $6D
|
||||
DY_I EQU $6E
|
||||
DY_F EQU $6F
|
||||
SPACEY_I EQU $70
|
||||
SPACEY_F EQU $71
|
||||
CY_I EQU $72
|
||||
CY_F EQU $73
|
||||
TEMP_I EQU $74
|
||||
TEMP_F EQU $75
|
||||
DISTANCE_I EQU $76
|
||||
DISTANCE_F EQU $77
|
||||
SPACEZ_I EQU $78
|
||||
SPACEZ_F EQU $79
|
||||
DRAW_SPLASH EQU $7A
|
||||
SPEED EQU $7B
|
||||
SPLASH_COUNT EQU $7C
|
||||
OVER_LAND EQU $7D
|
||||
NUM1L EQU $7E
|
||||
NUM1H EQU $7F
|
||||
NUM2L EQU $80
|
||||
NUM2H EQU $81
|
||||
RESULT EQU $82 ; 83,84,85
|
||||
NEGATE EQU $86 ; UNUSED?
|
||||
LAST_SPACEX_I EQU $87
|
||||
LAST_SPACEY_I EQU $88
|
||||
LAST_MAP_COLOR EQU $89
|
||||
DRAW_SKY EQU $8A
|
||||
COLOR_MASK EQU $8B
|
||||
RANDOM_POINTER EQU $8C
|
||||
STATE EQU $8D
|
||||
|
||||
SHIPY EQU $E4
|
||||
|
||||
KEYPRESS EQU $C000
|
||||
KEYRESET EQU $C010
|
||||
|
||||
;; SOFT SWITCHES
|
||||
CLR80COL EQU $C000 ; PAGE0/PAGE1 normal
|
||||
SET80COL EQU $C001 ; PAGE0/PAGE1 switches PAGE0 in Aux instead
|
||||
EIGHTYCOL EQU $C00D
|
||||
|
||||
SPEAKER EQU $C030
|
||||
|
||||
SET_GR EQU $C050
|
||||
SET_TEXT EQU $C051
|
||||
FULLGR EQU $C052
|
||||
TEXTGR EQU $C053
|
||||
PAGE0 EQU $C054
|
||||
PAGE1 EQU $C055
|
||||
LORES EQU $C056 ; Enable LORES graphics
|
||||
HIRES EQU $C057 ; Enable HIRES graphics
|
||||
AN3 EQU $C05E ; Annunciator 3
|
||||
|
||||
PADDLE_BUTTON0 EQU $C061
|
||||
PADDL0 EQU $C064
|
||||
PTRIG EQU $C070
|
||||
|
||||
;; BASIC ROUTINES
|
||||
|
||||
NORMAL EQU $F273
|
||||
|
||||
;; MONITOR ROUTINES
|
||||
|
||||
HLINE EQU $F819 ;; HLINE Y,$2C at A
|
||||
VLINE EQU $F828 ;; VLINE A,$2D at Y
|
||||
CLRSCR EQU $F832 ;; Clear low-res screen
|
||||
CLRTOP EQU $F836 ;; clear only top of low-res screen
|
||||
SETCOL EQU $F864 ;; COLOR=A
|
||||
TEXT EQU $FB36
|
||||
TABV EQU $FB5B ;; VTAB to A
|
||||
BASCALC EQU $FBC1 ;;
|
||||
VTAB EQU $FC22 ;; VTAB to CV
|
||||
HOME EQU $FC58 ;; Clear the text screen
|
||||
WAIT EQU $FCA8 ;; delay 1/2(26+27A+5A^2) us
|
||||
SETINV EQU $FE80 ;; INVERSE
|
||||
SETNORM EQU $FE84 ;; NORMAL
|
||||
COUT EQU $FDED ;; output A to screen
|
||||
COUT1 EQU $FDF0 ;; output A to screen
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
COLOR_BLACK EQU 0
|
||||
COLOR_RED EQU 1
|
||||
COLOR_DARKBLUE EQU 2
|
||||
COLOR_PURPLE EQU 3
|
||||
COLOR_DARKGREEN EQU 4
|
||||
COLOR_GREY EQU 5
|
||||
COLOR_MEDIUMBLUE EQU 6
|
||||
COLOR_LIGHTBLUE EQU 7
|
||||
COLOR_BROWN EQU 8
|
||||
COLOR_ORANGE EQU 9
|
||||
COLOR_GREY2 EQU 10
|
||||
COLOR_PINK EQU 11
|
||||
COLOR_LIGHTGREEN EQU 12
|
||||
COLOR_YELLOW EQU 13
|
||||
COLOR_AQUA EQU 14
|
||||
COLOR_WHITE EQU 15
|
||||
|
||||
COLOR_BOTH_RED EQU $11
|
||||
COLOR_BOTH_DARKBLUE EQU $22
|
||||
COLOR_BOTH_DARKGREEN EQU $44
|
||||
COLOR_BOTH_GREY EQU $55
|
||||
COLOR_BOTH_MEDIUMBLUE EQU $66
|
||||
COLOR_BOTH_LIGHTBLUE EQU $77
|
||||
COLOR_BOTH_BROWN EQU $88
|
||||
COLOR_BOTH_ORANGE EQU $99
|
||||
COLOR_BOTH_PINK EQU $BB
|
||||
COLOR_BOTH_LIGHTGREEN EQU $CC
|
||||
COLOR_BOTH_YELLOW EQU $DD
|
||||
COLOR_BOTH_AQUA EQU $EE
|
||||
COLOR_BOTH_WHITE EQU $FF
|
||||
|
||||
AUX_BOTH_MEDIUMBLUE EQU $33 ; 0011 0011
|
||||
AUX_BOTH_GREY EQU $AA ; 1010 1010
|
||||
Loading…
Reference in New Issue