gr: scroll: random bot fits
This commit is contained in:
Vince Weaver
parent
ab46040837
commit
0d9db2963f
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@ -22,7 +22,7 @@ appleiibot.dsk: E2.BAS FLAME.BAS FLAME2.BAS HELLO \
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OVAL.BAS OVAL_HGR.BAS MOVING.BAS THICK_SINE.BAS TURKEY.BAS \
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FLAME_HGR.BAS RECT.BAS SNOWY.BAS EDGAR.BAS OOPS4.BAS OOPS3.BAS \
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HORROR.BAS DIAMOND.BAS LEMM.BAS OOPS.BAS SPLIT.BAS PARTICLE.BAS \
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PARTICLE_HGR.BAS DIAMOND_SCROLL.BAS
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PARTICLE_HGR.BAS DIAMOND_SCROLL.BAS RANDOM_SCROLL.BAS
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# cp $(EMPTY_DISK)/empty.dsk appleiibot.dsk
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cp empty.dsk appleiibot.dsk
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$(DOS33) -y appleiibot.dsk BSAVE -a 0x0300 LOAD
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@ -120,6 +120,7 @@ appleiibot.dsk: E2.BAS FLAME.BAS FLAME2.BAS HELLO \
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$(DOS33) -y appleiibot.dsk SAVE A PARTICLE.BAS
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$(DOS33) -y appleiibot.dsk SAVE A PARTICLE_HGR.BAS
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$(DOS33) -y appleiibot.dsk SAVE A DIAMOND_SCROLL.BAS
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$(DOS33) -y appleiibot.dsk SAVE A RANDOM_SCROLL.BAS
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####
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@ -678,5 +679,11 @@ DIAMOND_SCROLL.BAS: diamond_scroll.bas
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####
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RANDOM_SCROLL.BAS: random_scroll.bas
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$(TOKENIZE) < random_scroll.bas > RANDOM_SCROLL.BAS
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####
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clean:
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rm -f *~ *.o *.lst convert_to convert_from convert_qkumba convert_vmw make_boxes convert_back convert_tgreene LOAD *.BAS make_hgr_boxes
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@ -0,0 +1,2 @@
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1FORI=0TO140:POKE875+I,4*PEEK(2125+I)-204+(PEEK(2266+I/3)-35)/4^(I-INT(I/3)*3):NEXT
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2&"/fo<HcPqTh35I3Tq]e;]rXPY22]b3oWrU7p9OQ3I4=-ST/8\qMSTrWeKrOq=+ehP2U8Dq8M@N;\h35E;T0X6Uk3D]3Ei3Ek3Q2]iU<I4ma6h_Q3Rp]bHcD3F@0rfpqdhr$oTKWZQr37J3S+4M4(#/P$$#`4Z6'$98FQ/'<M@VX)YY;JS5aL#(b8X_b2_
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@ -18,8 +18,7 @@ scroller.dsk: $(DOS33) HELLO DIAMOND DIAMOND_BOT RANDOM RANDOM_BOT
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$(DOS33) -y scroller.dsk BSAVE -a 0xc00 DIAMOND
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$(DOS33) -y scroller.dsk BSAVE -a 0x36B DIAMOND_BOT
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$(DOS33) -y scroller.dsk BSAVE -a 0xc00 RANDOM
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# $(DOS33) -y scroller.dsk BSAVE -a 0x36B RANDOM_BOT
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$(DOS33) -y scroller.dsk BSAVE -a 0xc00 RANDOM_BOT
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$(DOS33) -y scroller.dsk BSAVE -a 0x36B RANDOM_BOT
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###
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@ -54,8 +53,7 @@ random.o: random.s
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RANDOM_BOT: random_bot.o
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# ld65 -o RANDOM_BOT random_bot.o -C $(LINKERSCRIPTS)/apple2_36b.inc
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ld65 -o RANDOM_BOT random_bot.o -C $(LINKERSCRIPTS)/apple2_c00.inc
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ld65 -o RANDOM_BOT random_bot.o -C $(LINKERSCRIPTS)/apple2_36b.inc
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random_bot.o: random_bot.s
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ca65 -o random_bot.o random_bot.s -l random_bot.lst
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@ -1,7 +1,15 @@
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; random scroll bot
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; 126 bytes
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; 124 bytes (optimize PAGE load)
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; 162 bytes -- working code
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; 158 bytes -- play with bitmap
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; 156 bytes -- use HGR2 to init screen (and A)
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; 155 bytes -- remove use of LINE count
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; 155 bytes -- use ZP for output
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; 153 bytes -- count X backwards
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; 150 bytes -- use $28 to center Y trick
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; 146 bytes -- inline update scroll, makes it scroll right rather than up
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; 144 bytes -- share common sta OUTH
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; 141 bytes -- more wrapping loop stuff
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; ***** *****
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; ***** *****
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@ -19,6 +27,7 @@ PAGE1 = $C054
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PAGE2 = $C055
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LORES = $C056 ; Enable LORES graphics
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HGR2 = $F3D8
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PLOT = $F800 ; PLOT AT Y,A (A colors output, Y preserved)
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GBASCALC = $F847 ; Y in A, put addr in GBASL/GBASH
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SETGR = $FB40
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@ -27,8 +36,8 @@ WAIT = $FCA8 ; delay 1/2(26+27A+5A^2) us
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GBASL = $26
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GBASH = $27
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B1 = $FC
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B2 = $FD
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OUTL = $FC
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OUTH = $FD
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PAGE = $FE
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LINE = $FF
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@ -37,57 +46,83 @@ pattern1 = $f000 ; location in memory
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random:
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jsr SETGR ; set LORES
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bit FULLGR ; display FULLSCREEN
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jsr HGR2 ; set HIRES, FULLSCREEN
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bit LORES ; set LORES
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lda #$0 ; reset to beginning
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sta PAGE
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; A is 0 from HGR2
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sta OUTL
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random_loop:
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; lda #$4
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main_loop:
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sta PAGE ; start at page 1
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asl ; make OUTH $4 or $8 depending on value in PAGE
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; which we have in A above or at end of loop
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asl ; C is 0
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adc #4
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sta OUTH
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lda #200
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jsr WAIT
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lda #8 ; lines to count (*3=24)
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sta LINE
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;============================
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; draw an interleaved line
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line_loop:
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ldx #119
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ldy #119
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screen_loop:
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txa ; extrapolate Y from X
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tya ; extrapolate Y from X
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and #$7
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tay
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tax
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pattern_smc:
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lda pattern1,Y
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lda pattern1,X
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inner_loop_smc:
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sta $400,X
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dex
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sta (OUTL),Y
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dey
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bpl screen_loop
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;=================================
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; move to next pattern
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; assume we are in same 256 byte page (so high byte never change)
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jsr scroll_pattern
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; jsr scroll_pattern
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scroll_pattern:
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clc
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lda pattern_smc+1
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adc #8
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and #$1f
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sta pattern_smc+1
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; rts
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; move to next line
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clc
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lda inner_loop_smc+1
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lda OUTL
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adc #$80
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sta inner_loop_smc+1 ; FIXME just inc if carry set
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bcc noflo
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inc inner_loop_smc+2
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noflo:
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sta OUTL
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dec LINE
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bcc line_loop
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; A is $00 if we get here
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adc OUTH
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sta OUTH
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and #$3
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bne line_loop
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done_bg:
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;=======================================
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; done drawing frame
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;=======================================
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@ -96,38 +131,39 @@ noflo:
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;======================
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; draw bitmap
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ldx #0
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ldx #7
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boxloop:
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txa
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clc
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adc #8
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jsr GBASCALC
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jsr GBASCALC ; calc address of X
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; note we center to middle of screen
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; by noting the middle 8 lines
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; are offset by $28 from first 8 lines
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; GBASL is in A at this point
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clc
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adc #12
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sta GBASL
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adc #12+$28
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sta GBASL ; center x-coord and y-coord at same time
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lda PAGE
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lda PAGE ; want to add 0 or 4 (not 0 or 1)
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asl
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asl
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; clc
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asl ; this sets C to 0
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adc GBASH
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sta GBASH
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lda bitmap,X
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sta B1
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lda bitmap2,X
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sta B2
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ldy #15
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draw_line_loop:
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lda #$00
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ror B1
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ror B2
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lda bitmap2,X ; get low bit of bitmap2 into carry
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lsr
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lda #$00 ; black is default color
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ror bitmap,X ; 16-bit rotate (in memory)
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ror bitmap2,X
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bcc its_black
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lda #$ff
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@ -137,15 +173,18 @@ its_black:
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dey
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bpl draw_line_loop
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inx
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cpx #8
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bne boxloop
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dex
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bpl boxloop
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;=========================
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; scroll one line
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jsr scroll_pattern
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; jsr scroll_pattern
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; to scroll up need to add 8?
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inc pattern_smc+1
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; switch page
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lda PAGE
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@ -154,24 +193,28 @@ its_black:
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ldy PAGE1,X ; flip page
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eor #$1
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sta PAGE ; is 4 or 8
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; sta PAGE ; is 0 or 1
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; reset page smc
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asl
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asl
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; clc
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adc #4
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sta inner_loop_smc+2
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; OUTH is either C00 or 800
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; want C00 to go to 400 and 800 to stay the same
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lda #200
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jsr WAIT
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; asl
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; asl ; C is 0
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; adc #4
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; sta OUTH
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; lda #200
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; jsr WAIT
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; A is 0 after
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beq random_loop
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jmp main_loop ; bra
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.if 0
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scroll_pattern:
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clc
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lda pattern_smc+1
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@ -180,6 +223,8 @@ scroll_pattern:
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sta pattern_smc+1
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rts
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.endif
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;01234567|01234567
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;
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; @@@@ @@@@
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@ -213,6 +258,8 @@ bitmap2:
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; want this at $3F5
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; we are 141 bytes long, so 36b
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jmp random
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