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hgr: starfield works

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This commit is contained in:
Vince Weaver 2021-06-13 01:49:52 -04:00
parent c9ce996ad4
commit 1d158c1b11
6 changed files with 26 additions and 18 deletions
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7
basic/appleiibot/Makefile
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@ -17,7 +17,7 @@ appleiibot.dsk: E2.BAS FLAME.BAS FLAME2.BAS HELLO \
COMBO.BAS WIRES.BAS PATTERN.BAS BALL.BAS LINES.BAS MOD9.BAS \
XOR_ZOOM.BAS MOD9_HGR.BAS SIER_HGR.BAS MOVE.BAS SINE.BAS XDRAW128.BAS \
GATOR.BAS CURSOR.BAS STARGATE.BAS TUNNEL.BAS STARFIELD.BAS \
STAROOPS.BAS
STAROOPS.BAS HGRSTARFIELD.BAS
# cp $(EMPTY_DISK)/empty.dsk appleiibot.dsk
cp empty.dsk appleiibot.dsk
@ -88,6 +88,7 @@ appleiibot.dsk: E2.BAS FLAME.BAS FLAME2.BAS HELLO \
$(DOS33) -y appleiibot.dsk SAVE A TUNNEL.BAS
$(DOS33) -y appleiibot.dsk SAVE A STARFIELD.BAS
$(DOS33) -y appleiibot.dsk SAVE A STAROOPS.BAS
$(DOS33) -y appleiibot.dsk SAVE A HGRSTARFIELD.BAS
####
@ -489,6 +490,10 @@ BALL.BAS: ball.bas
LINES.BAS: lines.bas
$(TOKENIZE) < lines.bas > LINES.BAS
####
HGRSTARFIELD.BAS: hgrstarfield.bas
$(TOKENIZE) < hgrstarfield.bas > HGRSTARFIELD.BAS
####

2
basic/appleiibot/hgrstarfield.bas Normal file
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@ -0,0 +1,2 @@
1FORI=0TO139:POKE876+I,4*PEEK(2125+I)-192+(PEEK(2265+I/3)-35)/4^(I-INT(I/3)*3):NEXT
2&",clU68V.b*lX6XD,fnV/QgQn]LBUBZJX05EmUm]X7g/JHKnUK]T+d0JSZMBe(j4YgQfTZWoX$5EkYn7]0+^0V1^:\Yn^0kUTZ/lQ[^,k:210M.ioH2/0Bk5J$Uo^=m(2nV:4#?o6HCH0S1PK&S4+$D#/53*<'W$CCEC,S+SWU+*'445:D&76T3C#Y#/

2
basic/appleiibot/staroops.bas
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@ -1,2 +1,2 @@
1FORI=0TO131:POKE884+I,4*PEEK(2125+I)-192+(PEEK(2257+I/3)-35)/4^(I-INT(I/3)*3):NEXT
2&",clU68V.b*lX.V7,fnV/Qh]\+d0FGb`\:b0T0OoQK]P7g/JPZUDe0l2aiQnVQWoX08=kYnC`,7a.b4X:^Rn^,kUS^0kU\\0l3N2/U0foH.31?o6I0Xob>m04nV:./Bo6H7J0S1PKFS4'W4#$G43*#%-%I#F#6.F?3'(,@(130(&$%;&S
2&",clU68V.b*lX.V7,fnV/Qh]\+d0FGb`\:b0T0OoQK]P7g/JSZUDe0l2aiQnVQWoX08=kYnC`,7a.b4X:^Rn^,kUS^0kU\\0l3N2/U0foH.31?o6I0Xob>m04nV:./Bo6H7J0S1PKFS4'W4#$G43*#%-%I#F#6.F?3'(,@(130(&$%;&S

4
graphics/hgr/starfield/Makefile
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@ -12,7 +12,7 @@ starfield.dsk: HELLO STARS FASTAR STARBOT STARTINY STAROOPS
$(DOS33) -y starfield.dsk SAVE A HELLO
$(DOS33) -y starfield.dsk BSAVE -a 0x0300 STARS
$(DOS33) -y starfield.dsk BSAVE -a 0x0C00 FASTAR
$(DOS33) -y starfield.dsk BSAVE -a 0x0C00 STARBOT
$(DOS33) -y starfield.dsk BSAVE -a 0x036C STARBOT
$(DOS33) -y starfield.dsk BSAVE -a 0x0C00 STARTINY
$(DOS33) -y starfield.dsk BSAVE -a 0x0374 STAROOPS
@ -41,7 +41,7 @@ stars.o: stars.s
###
STARBOT: starbot.o
ld65 -o STARBOT starbot.o -C $(LINKER_SCRIPTS)/apple2_c00.inc
ld65 -o STARBOT starbot.o -C $(LINKER_SCRIPTS)/apple2_36c.inc
starbot.o: starbot.s
ca65 -o starbot.o starbot.s -l starbot.lst

27
graphics/hgr/starfield/starbot.s
View File

@ -7,6 +7,8 @@
; 155 bytes -- scale to more of full screen
; 153 bytes -- blue/orange instead of purple/green
; 149 bytes -- optimize 2nd plot arg shuffling
; 148 bytes -- optimize 1st plot arg shuffling
; 140 bytes -- turn off all range checking except Z
NUMSTARS = 27 ; 27 good, 28+ not work ($1C)
@ -85,7 +87,7 @@ big_loop:
; lda #100
; jsr WAIT
ldy #30
ldy #80
jsr BELL2 ; BEEP delays too
; A now 0
@ -104,12 +106,11 @@ star_loop:
stx SAVEX
ldy oldx,X ; get X valu into Y
; tya
; tax
sty TEMP
lda oldy,X
ldx TEMP
pha
lda oldx,X ; get X valu into Y
tax
pla
ldy #0
@ -139,10 +140,10 @@ star_loop:
; if off-screen then need new star
cmp #192
bcs new_star ; bge >39
cmp #0
bcc new_star ; if <0
; cmp #192
; bcs new_star ; bge >39
; cmp #0
; bcc new_star ; if <0
sta YY ; YY
@ -158,7 +159,7 @@ star_loop:
lda star_x,X ; get X of start
jsr do_divide
adc #128
adc #140 ; center
tay ; put XX in Y
sty oldx,X ; save for next time to erase
@ -239,7 +240,7 @@ color_lookup:
sta star_y,X ; random YY
lda $F002,Y
and #$7f ; random ZZ 0..127 (can't go negative or stars move backward)
and #$1f ; random ZZ 0..127 (can't go negative or stars move backward)
ora #$1 ; avoid 0
sta star_z,X
@ -294,5 +295,5 @@ early_out:
; for BASIC bot load
; need this to be at $3F5
; it's at 8C, so 6D
; it's at 89, so 6C
jmp small_starfield

2
graphics/hgr/starfield/staroops.s
View File

@ -158,7 +158,7 @@ star_loop:
lda star_x,X ; get X of start
jsr do_divide
adc #128
adc #140 ; center
tay ; put XX in Y
sty oldx,X ; save for next time to erase