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appleiibot: trying to shrink snow
This commit is contained in:
Vince Weaver
parent
62858a0c57
commit
c6f00818c2
@ -22,7 +22,7 @@ int main(int argc, char **argv) {
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enc[e]=0;
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printf("%s\n",enc);
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printf("2FORI=0TO%d:C%%=(PEEK(%d+I/3)-32)/4^(I-INT(I/3)*3):POKE768+I,C%%+4*(PEEK(2054+I)-32-INT(C%%/4)):NEXT:CALL768\n",
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printf("2FORI=0TO%d:C=(PEEK(%d+I/3)-32)/4^(I-INT(I/3)*3):POKE768+I,C+4*(PEEK(2054+I)-32-INT(C/4)):NEXT:CALL768\n",
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filesize,2054+filesize);
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// note, peek/poke truncate?
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14
hgr/Makefile
14
hgr/Makefile
@ -5,9 +5,10 @@ TOKENIZE = ../asoft_basic-utils/tokenize_asoft
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all: hgr.dsk
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hgr.dsk: SNOW
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hgr.dsk: SNOW SNOW2
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cp empty.dsk hgr.dsk
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$(DOS33) -y hgr.dsk BSAVE -a 0x0300 SNOW
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$(DOS33) -y hgr.dsk BSAVE -a 0x0300 SNOW2
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###
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@ -19,5 +20,14 @@ snow.o: snow.s
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###
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SNOW2: snow2.o
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ld65 -o SNOW2 snow2.o -C ../linker_scripts/apple2_300.inc
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snow2.o: snow2.s
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ca65 -o snow2.o snow2.s -l snow2.lst
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###
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clean:
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rm -f *~ *.o *.lst SNOW
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rm -f *~ *.o *.lst SNOW SNOW2
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208
hgr/snow2.s
208
hgr/snow2.s
@ -1,109 +1,114 @@
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GBASL = $26
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GBASH = $27
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HGRPAGE = $E6
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; a snowflake
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PAGE0 = $C054
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PAGE1 = $C055
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; 216 bytes
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; 209 -- remove extraneous call to HGR
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; 207 -- use bvc to check page
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; 203 -- hardcode x coords
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; 199 -- line in ZP
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; 192 -- ybase in ZP
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; 171 -- remove self-modifying code
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; 167 -- remove YBASE ininitialization
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; 161 -- only fall to 128 then recycle
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HGR = $F3E2
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HGR2 = $F3D8
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GBASL = $26
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GBASH = $27
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HGRPAGE = $E6
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YLO = $FC
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XIDX = $FD
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YBASE = $FE
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LINE = $FF
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PAGE0 = $C054
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PAGE1 = $C055
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HGR = $F3E2
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HGR2 = $F3D8
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HCLR = $F3F2
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HPOSN = $F411
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WAIT = $FCA8 ;; delay 1/2(26+27A+5A^2) us
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snow:
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jsr HGR
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jsr HGR2
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lda #0
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sta ybase
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lda #$20
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sta HGRPAGE
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jsr HGR2 ; 3
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move_snow:
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lda HGRPAGE
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cmp #$20
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beq show_page1
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lda #0 ; 2
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sta XIDX ; 2
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; 17 bytes to set page
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bit HGRPAGE ; V set if $40 ; 3
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bvc show_page1 ; 2
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show_page2:
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bit PAGE1
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lsr HGRPAGE
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bne doit
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bit PAGE1 ; 3
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lsr HGRPAGE ; 2
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bne doit ; 2
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show_page1:
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bit PAGE0
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asl HGRPAGE
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bit PAGE0 ; 3
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asl HGRPAGE ; 2
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doit:
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jsr HCLR
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lda #<flake
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sta ll_smc+1
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lda #$18
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sta c_smc
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lda #$69
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sta dir_smc
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lda #23
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sta line
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sta LINE
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inc ybase
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lda ybase
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sta ylo
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cmp #160
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bne snow_loop
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inc YBASE
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lda YBASE
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sta YLO
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; cmp #160
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; bcc snow_loop
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lda #0
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sta ybase
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; lda #0
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and #$7f
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sta YBASE
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snow_loop:
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ldy xhi
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ldx xlo
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lda ylo
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ldy #$0 ; xhi
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ldx #130 ; xlo -- (mult of 16)+2 for code to work
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ylo_smc:
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lda YLO ; ylo
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jsr HPOSN
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ldx #0
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ldx XIDX
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line_loop:
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ll_smc:
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lda flake,X
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sta (GBASL),Y
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inx
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iny
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cpx #6
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bne line_loop
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tya
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and #$8
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beq line_loop
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lda ll_smc+1
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c_smc:
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lda XIDX
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ldx LINE
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cpx #13
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bcc do_sub
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do_add:
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clc
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dir_smc:
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adc #6
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sta ll_smc+1
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bne done_math
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do_sub:
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sec
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sbc #6
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inc ylo
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dec line
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beq forever
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done_math:
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sta XIDX
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lda line
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cmp #12
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inc YLO
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dec LINE
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beq move_snow
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bne snow_loop
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lda #$E9 ; sbc imm
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sta dir_smc
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lda #$38 ; sec
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sta c_smc
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jmp snow_loop
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forever:
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jmp move_snow
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xhi: .byte $00
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xlo: .byte 77
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ybase: .byte 100
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ylo: .byte 100
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line: .byte 23
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; 6*12 = 72 bytes
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flake:
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.byte $00,$00,$40,$01,$00,$00
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.byte $00,$00,$0C,$18,$00,$00
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@ -118,3 +123,66 @@ flake:
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.byte $00,$18,$0F,$78,$0C,$00
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.byte $00,$60,$40,$01,$03,$00
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;fluke:
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; .byte $00,$00,$40,$01,$00,$00
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; .byte $0C,$18,$00,$00
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; .byte $70,$07,$00,$00
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; .byte $43,$61,$00,$00
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; .byte $4C,$19,$00,$00
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; .byte $33,$00,$70,$07,$00,$66
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; .byte $30,$06,$40,$01,$30,$06
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; .byte $3f,$06,$40,$01,$30,$7e
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; .byte $40,$07,$30,$06,$70,$01
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; .byte $7c,$07,$30,$06,$70,$1f
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; .byte $00,$18,$0F,$78,$0C,$00
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; .byte $00,$60,$40,$01,$03,$00
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;offsets:
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; .byte 0,4,8,12,16,
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;floke:
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; .byte $0,$0,$1,$2,$0,$0
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; .byte $0,$0,$3,$4,$0,$0
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; .byte $0,$0,$5,$6,$0,$0
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; .byte $0,$0,$7,$8,$0,$0
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; .byte $0,$0,$9,$A,$0,$0
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; .byte $B,$0,$5,$6,$0,$C
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; .byte $D,$E,$1,$2,$d,$E
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; .byte $F,$E,$1,$2,$d,$7e
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; .byte $1,$6,$d,$e,$5,$01
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; .byte $7c,$6,$d,$e,$5,$1f
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; .byte $0,$4,$0F,$78,$3,$0
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; .byte $0,$60,$1,$2,$03,$0
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;tokens:
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; .byte $00,$40,$01,$0C
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; .byte $18,$70,$07,$43
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; .byte $61,$4C,$19,$33
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; .byte $66,$30,$06,$3F
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; 00 000000 -> 0 0 00 00 00 - 0 00 00 00 0
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; 08 000100 -> 0 1 00 00 00 - 0 00 00 00 1
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; lda flake2,X
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; asl
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; php
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; ror out
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; plp
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; ror out
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;flake2:
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; .byte $00,$08,$00
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; .byte $00,$22,$00
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; .byte $00,$1C,$00
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; .byte $00,$49,$00
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; .byte $00,$2A,$00
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; .byte $60,$1C,$05
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; .byte $14,$08,$14
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; .byte $74,$08,$17
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; .byte $0C,$14,$18
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; .byte $3C,$14,$1E
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; .byte $02,$63,$20
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; .byte $01,$08,$40
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