midline: working?
This commit is contained in:
Vince Weaver
parent
80af2dd610
commit
9a9cb955d2
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@ -7,10 +7,11 @@ EMPTYDISK = ../../empty_disk/empty.dsk
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all: demo.dsk
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demo.dsk: HELLO MIDLINE
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demo.dsk: HELLO MIDLINE GOOD
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cp $(EMPTYDISK) demo.dsk
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$(DOS33) -y demo.dsk SAVE A HELLO
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$(DOS33) -y demo.dsk BSAVE -a 0x6000 MIDLINE
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$(DOS33) -y demo.dsk BSAVE -a 0x6000 GOOD
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###
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@ -23,10 +24,20 @@ MIDLINE: midline.o
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ld65 -o MIDLINE midline.o -C $(LINKERSCRIPTS)/apple2_6000.inc
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midline.o: midline.s \
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zp.inc hardware.inc
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zp.inc hardware.inc sinetable.s
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ca65 -o midline.o midline.s -l midline.lst
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###
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GOOD: good.o
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ld65 -o GOOD good.o -C $(LINKERSCRIPTS)/apple2_6000.inc
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good.o: good.s \
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zp.inc hardware.inc sinetable.s
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ca65 -o good.o good.s -l good.lst
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###
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clean:
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rm -f *~ *.o *.lst HELLO MIDLINE
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rm -f *~ *.o *.lst HELLO MIDLINE GOOD
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@ -0,0 +1,271 @@
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; a 256-byte midline demo for Outline 2023
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; by Vince `deater` Weaver / dSr
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; requires an Apple IIe
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.include "zp.inc"
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.include "hardware.inc"
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; 198 bytes -- proof of concept
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; 76 bytes -- optimize Apple II Forever printing code
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; 183 bytes -- stable window
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; 248 bytes -- sine code added
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; 274 bytes -- after much frustration, things sorta working
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; 261 bytes -- use zp for sine generation
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; 257 bytes -- inline sine generation
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; 259 bytes -- fix sine generation initialization, shave some message print
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; 247 bytes -- start replacing sather delays with something more compact
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; 229 bytes -- finish replacing sather delays
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; 228 bytes -- optimize and center the middle area
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; 226 bytes -- init some of zero page to zero
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; 244 bytes -- switch to hires too
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; 247 bytes -- clear HGR
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sine = $c00 ; location of sine table
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midline:
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;================================
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; Clear screen and setup graphics
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;================================
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; init $F1-$FF to zero
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lda #0
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ldx #15
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init_loop:
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sta $F0,X
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dex
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bne init_loop
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; setup graphics
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sta SETMOUSETEXT ; enable mouse text for Apple char
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.include "sinetable.s" ; Y is FF after this
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; A = 1, X = $40
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;====================================================
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; setup text page1 screen of "Apple II Forever" text
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;====================================================
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; X is $40 which is probably OK
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; ldx #0
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restart:
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tay ; reset Y to 0 (or 1 first time through)
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inx
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beq print_done
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print_loop:
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lda a2_string,Y
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beq restart
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jsr COUT ; output char in A to stdout
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iny
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bne print_loop
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print_done:
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jsr HGR ; A and Y=0 now
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sta FULLGR
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;==================================
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; get exact vblank region
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;==================================
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; code by Sather
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; "Understanding the Apple IIe"
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poll1:
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lda VBLANK ; Find end of VBL
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bmi poll1 ; Fall through at VBL
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poll2:
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lda VBLANK
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bpl poll2 ; Fall through at VBL' ; 2
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lda $00 ;nop3 ; Now slew back in 17029 cycle loops ; 3
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lp17029:
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; delay 17020
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lda #7 ; 2
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ldy #96 ; 2
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jsr size_delay ; 17012
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nop ; 2
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nop ; 2
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lda VBLANK ; Back to VBL yet? ; 4
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nop ; ; 2
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bmi lp17029 ; no, slew back ; 2/3
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;==============================
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; do the cycle counting
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;==============================
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cycle_start:
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;==============================
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; top
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; 2
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top_smc:
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ldx #66 ; 2
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bne top7 ; bra ; 3/2
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top_loop:
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pha ; 3
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pla ; 4
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top7:
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; 7
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lda #0 ; 2
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ldy #3 ; 2
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; 11
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; want to delay 49
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jsr size_delay ; 47
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; 58
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nop ; 2
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; 60
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dex ; 2
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bne top_loop ; 3/2
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;===================================
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; middle
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; -1
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ldx #56 ; 2
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bne middle_4 ; bra ; 3
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middle_loop:
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nop ; 2
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nop ; 2
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middle_4:
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; 4
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nop ; 2
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lda $0 ; nop3 ; 3
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; 9
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jsr delay_16_setgr ; 16
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; 25
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jsr delay_16_settext ; 16
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; 41
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jsr delay_16_setgr ; 16
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; 57
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lda $0 ; nop3 ; 3
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; 60
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dex ; 2
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bne middle_loop ; 3/2
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; -1
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bottom_smc:
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ldx #118 ; 2
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bne bottom_4 ; bra ; 3
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bottom_loop:
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nop ; 2
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nop ; 2
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; 4
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bottom_4:
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; 4
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lda #0 ; 2
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ldy #3 ; 2
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; 8
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; want to delay 50
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jsr size_delay ; 47
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; 55
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lda $0 ; nop3 ; 3
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; 58
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inx ; 2
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cpx #192 ; 2
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bcc bottom_loop ; 3/2
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; -1
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;======================================
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; wait 4550 for VBLANK
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;======================================
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; -1 from before
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vblank_start:
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; move window
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; -1
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clc ; 2
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lda FRAME ; 3
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adc #1 ; 2
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sta FRAME ; 3
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tay ; save for later ; 2
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; 11
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lda #0 ; 2
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rol ; get carry bit in A ; 2
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eor screen_smc+1 ; 4
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sta screen_smc+1 ; 4
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; 23
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screen_smc:
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bit LORES ; LORES=C056 HIRES=C057 ; 4
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; 27
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; FRAME should be in Y
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lda sine,Y ; 4 (aligned)
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; 31
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clc ; 2
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adc #2 ; 2
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sta top_smc+1 ; 4
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adc #56 ; 2
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sta bottom_smc+1 ; 4
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; 45
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; finish delay
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; 45
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lda #1 ; 2
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ldy #241 ; 2
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; 49
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jsr size_delay ; 4493
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; 4542
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pha ; 3
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pla ; 4
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; 4549
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jmp cycle_start ; 3
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; 4552
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; want 4552 here
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delay_16_setgr:
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bit SET_GR
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rts
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delay_16_settext:
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bit SET_TEXT
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rts
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;=====================================
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; short delay by Bruce Clark
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; any delay between 8 to 589832 with res of 9
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;=====================================
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; 9*(256*A+Y)+8 + 12 for jsr/rts
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size_delay:
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delay_loop:
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cpy #1
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dey
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sbc #0
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bcs delay_loop
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delay_12:
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rts
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a2_string:
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; 012345678901234567 8 9
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; .byte "Apple II Forever!! ",'@'+$80," ",0
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.byte 'A'+$80,'p'+$80,'p'+$80,'l'+$80,'e'+$80,' '+$80
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.byte 'I'+$80,'I'+$80,' '+$80,'F'+$80,'o'+$80,'r'+$80
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.byte 'e'+$80,'v'+$80,'e'+$80,'r'+$80,'!'+$80,'!'+$80
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.byte ' '+$80,'@'+$00,' '+$80,0
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@ -46,8 +46,10 @@ HGR = $F3E2
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HPOSN = $F411
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HPLOT0 = $F457 ; plot at (Y,X), (A)
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HGLIN = $F53A ; line to (X,A),(Y)
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XDRAW0 = $F65D
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ROM_TEXT2COPY = $F962 ; iigs
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ROM_MACHINEID = $FBB3 ; iigs
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COUT = $FDED
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@ -18,6 +18,16 @@
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; 247 bytes -- start replacing sather delays with something more compact
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; 229 bytes -- finish replacing sather delays
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; 228 bytes -- optimize and center the middle area
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; 226 bytes -- init some of zero page to zero
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; 244 bytes -- switch to hires too
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; 247 bytes -- clear HGR
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; 264 bytes -- add HGR
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; 263 bytes -- better nop
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; 263 bytes -- don't init zero page anymore
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; 259 bytes -- combine delay_49 routines
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; 258 bytes -- init discrete
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; GOAL = 256 (Outline 2023 says header doesn't count, is usually 4 on Apple II)
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sine = $c00 ; location of sine table
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@ -28,13 +38,20 @@ midline:
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; Clear screen and setup graphics
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;================================
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sta FULLGR
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ldx #0
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stx DELTA
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stx DELTAH
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; setup graphics
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sta SETMOUSETEXT ; enable mouse text for Apple char
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;==============================
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; set up sine table
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; X must be 0 when calling
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.include "sinetable.s" ; Y is FF after this
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; A = 1, X = $40
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iny ; needed?
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sty FRAME
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;====================================================
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; setup text page1 screen of "Apple II Forever" text
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@ -54,6 +71,33 @@ print_loop:
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bne print_loop
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print_done:
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;===================
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; do graphics
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jsr HGR ; A and Y=0 now
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sta FULLGR
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jsr HPLOT0 ; set screen position to X= (y,x) Y=(a)
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; saves X,Y,A to zero page
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; after Y= orig X/7
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; A and X are ??
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tiny_loop:
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lda #$F6 ; ROT=$F6
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tay
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tax
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dex
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jsr XDRAW0 ; XDRAW 1 AT X,Y
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; Both A and X are 0 at exit
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; Z flag set on exit
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; Y varies
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dec $0a ; is $4c due to basic
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bne tiny_loop ;
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;==================================
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@ -105,12 +149,13 @@ top_loop:
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pla ; 4
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top7:
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; 7
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lda #0 ; 2
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ldy #3 ; 2
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; lda #0 ; 2
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; ldy #3 ; 2
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; 11
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; want to delay 49
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jsr delay_49
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jsr size_delay ; 47
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; jsr size_delay ; 47
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; 58
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nop ; 2
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; 60
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@ -129,26 +174,20 @@ middle_loop:
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nop ; 2
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nop ; 2
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middle_4:
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nop ; 2
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; nop ; 2
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lda $0
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; 8
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; 4
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inc $0 ; nop5 ; 5
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; 9
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jsr delay_16_setgr ; 16
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; 24
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; 25
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jsr delay_16_settext ; 16
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; 40
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; 41
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jsr delay_16_setgr ; 16
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; 56
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lda $0
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; nop ; 2
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; nop ; 2
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; 57
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lda $0 ; nop3 ; 3
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; 60
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dex ; 2
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bne middle_loop ; 3/2
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; -1
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bottom_smc:
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ldx #118 ; 2
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@ -161,12 +200,12 @@ bottom_loop:
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; 4
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bottom_4:
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; 4
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lda #0 ; 2
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ldy #3 ; 2
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; lda #0 ; 2
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; ldy #3 ; 2
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; 8
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; want to delay 50
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jsr size_delay ; 47
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jsr delay_49
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; jsr size_delay ; 47
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; 55
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lda $0 ; nop3 ; 3
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; 58
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@ -184,44 +223,73 @@ vblank_start:
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; move window
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; -1
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inc FRAME ; 5
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; 4
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ldy FRAME ; 3
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lda sine,Y ; 4 (aligned)
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; -1
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clc ; 2
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lda FRAME ; 3
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adc #1 ; 2
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sta FRAME ; 3
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tay ; save for later ; 2
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; 11
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lda #0 ; 2
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rol ; get carry bit in A ; 2
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eor screen_smc+1 ; 4
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sta screen_smc+1 ; 4
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; 23
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screen_smc:
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bit LORES ; LORES=C056 HIRES=C057 ; 4
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; 27
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; FRAME should be in Y
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lda sine,Y ; 4 (aligned)
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; 31
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clc ; 2
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adc #2 ; 2
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sta top_smc+1 ; 4
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adc #56 ; 2
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sta bottom_smc+1 ; 4
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; 45
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; finish delay
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; 25
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; 45
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lda #1 ; 2
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ldy #244 ; 2
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; 29
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jsr size_delay ; 4520
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ldy #241 ; 2
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; 49
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jsr size_delay ; 4493
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; 4542
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pha ; 3
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pla ; 4
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; 4549
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jmp cycle_start ; 3
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; 4552
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jmp cycle_start
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; +2
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; want 4552 here
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delay_16_settext:
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bit SET_TEXT
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rts
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delay_16_setgr:
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bit SET_GR
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rts
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delay_16_settext:
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bit SET_TEXT
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rts
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delay_49:
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lda #0 ; 2
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ldy #3 ; 2
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;=====================================
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; short delay by Bruce Clark
|
||||
; any delay between 8 to 589832 with res of 9
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||||
;=====================================
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||||
; 9*(256*A+Y)+8 + 12 for jsr/rts
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; A and Y both $FF at the end
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size_delay:
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delay_loop:
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|
|
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@ -1,30 +1,38 @@
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;=================================
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; fakes sines based on parabolas
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; based on code by White Flame from codebase64
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||||
; based on code by White Flame via Cruzer/Camelot
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; from codebase64
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;=================================
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; makes 256 entries, min 0 max 127
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; call with X=0!
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;DELTA = $2000
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;VALUE = $2002
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initSineTable:
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ldy #$3f
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ldx #$00
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; ldx #$00
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; Accumulate the delta (16-bit addition)
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init_sine_loop:
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lda VALUE
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value_l_smc:
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lda #0
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clc
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||||
adc DELTA
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sta VALUE
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lda VALUE+1
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sta value_l_smc+1
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value_h_smc:
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lda #0
|
||||
adc DELTA+1
|
||||
sta VALUE+1
|
||||
sta value_h_smc+1
|
||||
|
||||
; Reflect the value around for a sine wave
|
||||
sta sine+$c0,x
|
||||
sta sine+$80,y
|
||||
sta sine+$c0,X
|
||||
sta sine+$80,Y
|
||||
eor #$7f
|
||||
sta sine+$40,x
|
||||
sta sine+$00,y
|
||||
sta sine+$40,X
|
||||
sta sine+$00,Y
|
||||
|
||||
; Increase the delta, which creates the
|
||||
; "acceleration" for a parabola
|
||||
|
|
@ -41,6 +49,6 @@ init_sine_noflo:
|
|||
dey
|
||||
bpl init_sine_loop
|
||||
|
||||
rts
|
||||
; rts
|
||||
|
||||
|
||||
|
|
|
|||
|
|
@ -67,7 +67,7 @@ SOUND_STATUS = $DE
|
|||
|
||||
|
||||
|
||||
|
||||
HGR_COLLISIONS = $EA
|
||||
HGRPAGE = $E6
|
||||
|
||||
|
||||
|
|
@ -77,6 +77,11 @@ XX = $F1
|
|||
FRAME = $F2
|
||||
FRAMEH = $F3
|
||||
|
||||
;VALUE = $F4
|
||||
;VALUEH = $F5
|
||||
DELTA = $F6
|
||||
DELTAH = $F7
|
||||
|
||||
YPOS = $FA
|
||||
TCOLOR = $FB
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue