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dos33fsprogs
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gears: update gears_tiny

This commit is contained in:
Vince Weaver 2023-01-25 00:58:07 -05:00
parent 58bd996bdf
commit c12c4148b4
2 changed files with 35 additions and 30 deletions
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15
graphics/hgr/shape_table/Makefile
View File

@ -9,12 +9,14 @@ all: shape_table.dsk
shape_table.dsk: HELLO APPLE.BAS GEARS.BAS \
APPLE2 GEARS LINE32 PATTERN PATTERN_LOGO SQUARE_WAVE \
AGONY17 HERRING16 STRIPE17 COOL_WAVE TEETH32 TICK_TOCK
AGONY17 HERRING16 STRIPE17 COOL_WAVE TEETH32 TICK_TOCK \
GEARS_TINY
cp $(EMPTYDISK) shape_table.dsk
$(DOS33) -y shape_table.dsk SAVE A HELLO
$(DOS33) -y shape_table.dsk SAVE A GEARS.BAS
$(DOS33) -y shape_table.dsk SAVE A APPLE.BAS
$(DOS33) -y shape_table.dsk BSAVE -a 0x3f5 GEARS
$(DOS33) -y shape_table.dsk BSAVE -a 0x60 GEARS_TINY
$(DOS33) -y shape_table.dsk BSAVE -a 0xc00 APPLE2
$(DOS33) -y shape_table.dsk BSAVE -a 0xc00 LINE32
$(DOS33) -y shape_table.dsk BSAVE -a 0xe7 AGONY17
@ -53,6 +55,15 @@ gears.o: gears.s
###
GEARS_TINY: gears_tiny.o
ld65 -o GEARS_TINY gears_tiny.o -C $(LINKERSCRIPTS)/apple2_60_zp.inc
gears_tiny.o: gears_tiny.s
ca65 -o gears_tiny.o gears_tiny.s -l gears_tiny.lst
###
SQUARE_WAVE: square_wave.o
ld65 -o SQUARE_WAVE square_wave.o -C $(LINKERSCRIPTS)/apple2_e7_zp.inc
@ -152,4 +163,4 @@ pattern_logo.o: pattern_logo.s
clean:
rm -f *~ *.o *.lst HELLO GEAR.BAS GEARS PATTERN APPLE.BAS \
PATTERN_LOGO COOL_WAVE SQUARE_WAVE TEETH32 TICK_TOCK \
HERRING16 STRIPE17 AGONY17 LINE32 APPLE2
HERRING16 STRIPE17 AGONY17 LINE32 APPLE2 GEARS_TINY

50
graphics/hgr/shape_table/gears_tiny.s
View File

@ -6,6 +6,9 @@
; 106 bytes -- move to zero page
; 104 bytes -- use smaller_smc
; 103 bytes -- use which_smc
; 102 bytes -- note register is zero
; 99 bytes -- make rotate use adc instead of inc
; 95 bytes -- fall through
; zero page locations
HGR_SHAPE = $1A
@ -70,8 +73,6 @@ gears_tiny:
lda #8
sta HGR_SCALE
; sty SMALLER ; init to 0
jsr draw_scene
;===================
@ -112,17 +113,21 @@ rotate_it:
draw_scene:
; Y is zero from HGR
; Y is zero from HGR/HGR2
ldx #110
lda #10
jsr HPOSN ; set screen position to X= (y,x) Y=(a)
; saves X,Y,A to zero page
; after Y= orig X/7
; A and X are ??
ldy #32
jsr draw_gear
ldy #0
ldy #32 ; Y = steps to draw
lda #2 ; A = rotation increment
jsr draw_gear
; A and X zero on return
tay ; set Y to 0
ldx #235
lda #100
jsr HPOSN ; set screen position to X= (y,x) Y=(a)
@ -130,45 +135,34 @@ draw_scene:
; after Y= orig X/7
; A and X are ??
ldy #16 ; only 16 repeats
lda #4 ; A = rotation increment
; inc SMALLER
inc smaller_smc+1
ldy #16
jsr draw_gear
; dec SMALLER
dec smaller_smc+1
rts
; fall through
;===============================
;===============================
;===============================
;===============================
draw_gear:
sty ROTATION
sty ROTATION ; set number of rotations
sta smaller_smc+1 ; set rotation increment
gear1_loop:
inc rot_smc+1
inc rot_smc+1
clc
lda rot_smc+1
smaller_smc:
lda #0
beq not_smaller
inc rot_smc+1
inc rot_smc+1
adc #2
sta rot_smc+1
not_smaller:
which_smc:
ldx #<gear1_table ; point to bottom byte of shape address
ldy #>gear1_table ; point to top byte of shape address
; this is always 0 if in zero page
; ROT in A
; this will be 0 2nd time through loop, arbitrary otherwise
rot_smc:
lda #1 ; ROT=1 at first