mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-05-28 17:41:29 +00:00
megademo: add in mode7 code
this might be ill-advised
This commit is contained in:
Vince Weaver
parent
da861f9113
commit
d208ea0cd3
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@ -30,6 +30,7 @@ megademo.o: megademo.s \
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starring_people.s fs.inc FS_HGRC.BIN.lz4 deater.inc DEATER_HGRC.BIN.lz4\
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check_email.s email_40_96.inc \
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bird_mountain.s \
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mode7.s \
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fireworks.s fw_background.inc fw_state_machine.s fw.s \
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hgr.s random16.s move_letters.s
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ca65 -o megademo.o megademo.s -l megademo.lst
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79
megademo/bg_scroll.s
Normal file
79
megademo/bg_scroll.s
Normal file
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@ -0,0 +1,79 @@
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;==================
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; scroll background
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;==================
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; background already loaded
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; ANGLE 0-15 sets angle
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; CV is Y position to display at
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; 182/220... 220/16 = 13.75
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; 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
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; 0 11 22 34 45 56 68 79 91 102 113 125 136 147 159 170 182
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scroll_offsets:
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.byte 0,11,22,34,45,56,68,79,91,102,113,125,136,147,159,170
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scroll_background:
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ldy ANGLE ; use angle
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lda scroll_offsets,Y ; lookup in table
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sta OFFSET ; calculate offset
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ldx #0
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ldy CV ; lookup Y co-ord
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lsr ; and set up self-modify code
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lda gr_offsets,Y ; get position
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sta bgsm1+1
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lda gr_offsets+2,Y ; get position
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sta bgsm2+1
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lda gr_offsets+4,Y ; get position
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sta bgsm3+1
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lda gr_offsets+6,Y ; get position
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sta bgsm4+1
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iny
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clc
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lda gr_offsets,Y ; get position
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adc DRAW_PAGE
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sta bgsm1+2
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lda gr_offsets+2,Y ; get position
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adc DRAW_PAGE
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sta bgsm2+2
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lda gr_offsets+4,Y ; get position
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adc DRAW_PAGE
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sta bgsm3+2
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lda gr_offsets+6,Y ; get position
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adc DRAW_PAGE
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sta bgsm4+2
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ldy OFFSET
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bgdraw_loop:
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lda scroll_row1,Y
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bgsm1:
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sta $400,X
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lda scroll_row2,Y
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bgsm2:
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sta $480,X
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lda scroll_row3,Y
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bgsm3:
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sta $500,X
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lda scroll_row4,Y
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bgsm4:
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sta $580,X
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iny
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inx
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cpx #40
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bne bgdraw_loop
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rts
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@ -25,7 +25,7 @@ MARGIN = 24
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; Zero page addresses
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;STATE = $ED
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OFFSET = $EF
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;OFFSET = $EF
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COLOR_GROUP = $F0
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X_VELOCITY = $F1
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Y_VELOCITY_H = $F2
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192
megademo/gr_fast_clear.s
Normal file
192
megademo/gr_fast_clear.s
Normal file
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@ -0,0 +1,192 @@
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clear_screens:
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;===================================
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; Clear top/bottom of page 0
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;===================================
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lda #$0
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sta DRAW_PAGE
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jsr clear_top
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jsr clear_bottom
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;===================================
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; Clear top/bottom of page 1
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;===================================
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lda #$4
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sta DRAW_PAGE
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jsr clear_top
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jsr clear_bottom
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rts
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clear_bottoms:
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;===================================
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; Clear bottom of page 0
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;===================================
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lda #$0
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sta DRAW_PAGE
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jsr clear_bottom
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;===================================
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; Clear bottom of page 1
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;===================================
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lda #$4
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sta DRAW_PAGE
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jsr clear_bottom
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rts
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;=========================================================
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; clear_top
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;=========================================================
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; clear DRAW_PAGE
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; original = 14,558 cycles(?) 15ms, 70Hz
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; OPTIMIZED MAX (page0,48rows): 45*120+4+6 = 5410 = 5.4ms 185Hz
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; (pageX,40rows): 50*120+4+6 = 6010 = 6.0ms 166Hz
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; 50*120+4+6+37 = 6055 = 6.0ms 166Hz
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clear_top:
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lda #0 ; 2
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clear_top_a:
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sta COLOR ; 3
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clc ; 2
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lda DRAW_PAGE ; 3
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adc #4 ; 2
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sta __ctf+2 ; 3
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sta __ctf+5 ; 3
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adc #1 ; 2
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sta __ctf+8 ; 3
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sta __ctf+11 ; 3
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adc #1 ; 2
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sta __ctf2+2 ; 3
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sta __ctf2+5 ; 3
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adc #1 ; 2
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sta __ctf2+8 ; 3
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sta __ctf2+11 ; 3
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ldy #120 ; 2
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lda COLOR ; 3
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clear_top_fast_loop:
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__ctf:
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sta $400,Y ; 5
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sta $480,Y ; 5
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sta $500,Y ; 5
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sta $580,Y ; 5
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cpy #80 ; 2
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bpl no_draw_bottom ; 2nt/3
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__ctf2:
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sta $600,Y ; 5
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sta $680,Y ; 5
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sta $700,Y ; 5
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sta $780,Y ; 5
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no_draw_bottom:
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dey ; 2
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bpl clear_top_fast_loop ; 2nt/3
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rts ; 6
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;=========================================================
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; clear_bottom
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;=========================================================
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; clear bottom of draw page
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clear_bottom:
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clc ; 2
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lda DRAW_PAGE ; 3
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adc #6 ; 2
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sta __cbf2+2 ; 3
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sta __cbf2+5 ; 3
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adc #1 ; 2
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sta __cbf2+8 ; 3
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sta __cbf2+11 ; 3
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ldy #120 ; 2
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lda #$a0 ; Normal Space ; 2
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clear_bottom_fast_loop:
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__cbf2:
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sta $600,Y ; 5
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sta $680,Y ; 5
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sta $700,Y ; 5
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sta $780,Y ; 5
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dey ; 2
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cpy #80 ; 2
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bpl clear_bottom_fast_loop ; 2nt/3
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rts ; 6
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clear_screens_notext:
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;===================================
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; Clear top/bottom of page 0
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;===================================
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lda #$0
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sta DRAW_PAGE
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jsr clear_all
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;===================================
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; Clear top/bottom of page 1
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;===================================
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lda #$4
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sta DRAW_PAGE
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jsr clear_all
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rts
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;=========================================================
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; clear_all
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;=========================================================
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; clear 48 rows
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clear_all:
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clc ; 2
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lda DRAW_PAGE ; 3
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adc #4 ; 2
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sta __caf+2 ; 3
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sta __caf+5 ; 3
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adc #1 ; 2
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sta __caf+8 ; 3
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sta __caf+11 ; 3
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adc #1 ; 2
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sta __caf2+2 ; 3
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sta __caf2+5 ; 3
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adc #1 ; 2
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sta __caf2+8 ; 3
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sta __caf2+11 ; 3
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ldy #120 ; 2
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clear_all_color:
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lda #0 ; 2
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clear_all_fast_loop:
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__caf:
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sta $400,Y ; 5
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sta $480,Y ; 5
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sta $500,Y ; 5
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sta $580,Y ; 5
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__caf2:
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sta $600,Y ; 5
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sta $680,Y ; 5
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sta $700,Y ; 5
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sta $780,Y ; 5
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dey ; 2
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bpl clear_all_fast_loop ; 2nt/3
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rts ; 6
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67
megademo/gr_hlin_double.s
Normal file
67
megademo/gr_hlin_double.s
Normal file
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@ -0,0 +1,67 @@
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;=====================================================================
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;= ROUTINES
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;=====================================================================
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;================================
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; hlin_setup
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;================================
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; put address in GBASL/GBASH
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; Ycoord in A, Xcoord in Y
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hlin_setup:
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sty TEMPY ; 3
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tay ; y=A ; 2
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lda gr_offsets,Y ; lookup low-res memory address ; 4
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clc ; 2
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adc TEMPY ; 3
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sta GBASL ; 3
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iny ; 2
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lda gr_offsets,Y ; 4
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adc DRAW_PAGE ; add in draw page offset ; 3
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sta GBASH ; 3
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rts ; 6
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;===========
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; 35
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;================================
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; hlin_double:
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;================================
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; HLIN Y, V2 AT A
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; Y, X, A trashed
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; start at Y, draw up to and including X
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hlin_double:
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;int hlin_double(int page, int x1, int x2, int at) {
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jsr hlin_setup ; 41
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sec ; 2
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lda V2 ; 3
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sbc TEMPY ; 3
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tax ; 2
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inx ; 2
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;===========
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; 53
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; fallthrough
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;=================================
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; hlin_double_continue: width
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;=================================
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; GBASL has correct offset for row/col
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; width in X
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hlin_double_continue:
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ldy #0 ; 2
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lda COLOR ; 3
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hlin_double_loop:
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sta (GBASL),Y ; 6
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inc GBASL ; 5
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dex ; 2
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bne hlin_double_loop ; 2nt/3
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rts ; 6
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;=============
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; 53+5+X*16+5
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24
megademo/gr_pageflip.s
Normal file
24
megademo/gr_pageflip.s
Normal file
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@ -0,0 +1,24 @@
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;==========
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; page_flip
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;==========
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page_flip:
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lda DISP_PAGE ; 3
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beq page_flip_show_1 ; 2nt/3
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page_flip_show_0:
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bit PAGE0 ; 4
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lda #4 ; 2
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sta DRAW_PAGE ; DRAW_PAGE=1 ; 3
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lda #0 ; 2
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sta DISP_PAGE ; DISP_PAGE=0 ; 3
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rts ; 6
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page_flip_show_1:
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bit PAGE1 ; 4
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sta DRAW_PAGE ; DRAW_PAGE=0 ; 3
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lda #1 ; 2
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sta DISP_PAGE ; DISP_PAGE=1 ; 3
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rts ; 6
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;====================
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; DISP_PAGE=0 26
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; DISP_PAGE=1 24
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11
megademo/gr_setpage.s
Normal file
11
megademo/gr_setpage.s
Normal file
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@ -0,0 +1,11 @@
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;==========================================================
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; set_gr_page0
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;==========================================================
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;
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set_gr_page0:
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bit PAGE0 ; set page 0
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bit LORES ; Lo-res graphics
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bit TEXTGR ; mixed gr/text mode
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bit SET_GR ; set graphics
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rts
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63
megademo/island_lookup.s
Normal file
63
megademo/island_lookup.s
Normal file
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@ -0,0 +1,63 @@
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;====================================
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; do a full lookup, takes much longer
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; used to be a separate function but we inlined it here
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;====================
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; lookup_map
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;====================
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; finds value in space_x.i,space_y.i
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; returns color in A
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; CLOBBERS: A,Y
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lda SPACEX_I ; 3
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sta spacex_label+1 ; self modifying code, LAST_SPACEX_I ; 4
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and #CONST_MAP_MASK_X ; wrap at 64 ; 2
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sta SPACEX_I ; store i patch out ; 3
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tay ; copy to Y for later ; 2
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lda SPACEY_I ; 3
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sta spacey_label+1 ; self modifying code, LAST_SPACEY_I ; 4
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and #CONST_MAP_MASK_Y ; wrap to 64x64 grid ; 2
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sta SPACEY_I ; 3
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asl ; 2
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asl ; 2
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asl ; multiply by 8 ; 2
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clc ; 2
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adc SPACEX_I ; add in X value ; 3
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; only valid if x<8 and y<8
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; SPACEX_I is also in y
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cpy #$8 ; 2
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;============
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; 39
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bcs @ocean_color ; bgt 8 ; 2nt/3
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ldy SPACEY_I ; 3
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cpy #$8 ; 2
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;=============
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; 7
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bcs @ocean_color ; bgt 8 ; 2nt/3
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tay ; 2
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lda flying_map,Y ; load from array ; 4
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bcc @update_cache ; 3
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;============
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; 11
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@ocean_color:
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and #$1f ; 2
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tay ; 2
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lda water_map,Y ; the color of the sea ; 4
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;===========
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; 8
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@update_cache:
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sta map_color_label+1 ; self-modifying ; 4
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;===========
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; 4
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; rts ; 6
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16
megademo/island_map.inc
Normal file
16
megademo/island_map.inc
Normal file
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@ -0,0 +1,16 @@
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flying_map:
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.byte $22,$ff,$ff,$ff, $ff,$ff,$ff,$22
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.byte $dd,$cc,$cc,$88, $44,$44,$00,$dd
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.byte $dd,$cc,$cc,$cc, $88,$44,$44,$dd
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.byte $dd,$cc,$cc,$88, $44,$44,$44,$dd
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.byte $dd,$cc,$99,$99, $88,$44,$44,$dd
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.byte $dd,$cc,$99,$88, $44,$44,$44,$dd
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.byte $dd,$cc,$99,$99, $11,$44,$44,$dd
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.byte $22,$dd,$dd,$dd, $dd,$dd,$dd,$22
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water_map:
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.byte $22,$22,$22,$22, $22,$22,$22,$22
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.byte $ee,$22,$22,$22, $22,$22,$22,$22
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.byte $22,$22,$22,$22, $22,$22,$22,$22
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.byte $22,$22,$22,$22, $ee,$22,$22,$22
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@ -25,6 +25,8 @@ apple_iie:
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;===================
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jsr HOME
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jsr mode7_flying
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; C64 Opening Sequence
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jsr c64_opener
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@ -54,6 +56,7 @@ apple_iie:
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; Enter ship
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; mode7 (???)
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jsr mode7_flying
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; Fly in space
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@ -61,7 +64,7 @@ apple_iie:
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; Fireworks
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jsr fireworks
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; jsr fireworks
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; Game over
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game_over_man:
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@ -88,9 +91,10 @@ loop_forever:
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.include "wait_keypress.s"
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.include "random16.s"
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.align $100
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.include "fireworks.s"
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; .include "fireworks.s"
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.include "hgr.s"
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.include "bird_mountain.s"
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.include "move_letters.s"
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.align $100
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.include "gr_putsprite.s"
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.include "mode7.s"
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1130
megademo/mode7.s
Normal file
1130
megademo/mode7.s
Normal file
File diff suppressed because it is too large
Load Diff
214
megademo/mode7_sprites.inc
Normal file
214
megademo/mode7_sprites.inc
Normal file
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@ -0,0 +1,214 @@
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;================
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; Ship Sprites
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;================
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splash_forward:
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.byte $7,$2
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.byte $00,$ee,$00,$00,$00,$ee,$00
|
||||
.byte $ee,$00,$00,$00,$00,$00,$ee
|
||||
|
||||
splash_right:
|
||||
.byte $7,$2
|
||||
.byte $00,$00,$00,$00,$00,$ee,$00
|
||||
.byte $00,$00,$00,$00,$00,$00,$ee
|
||||
|
||||
|
||||
splash_left:
|
||||
.byte $7,$2
|
||||
.byte $00,$ee,$00,$00,$00,$00,$00
|
||||
.byte $ee,$00,$00,$00,$00,$00,$00
|
||||
|
||||
shadow_forward:
|
||||
.byte $3,$2
|
||||
.byte $00,$aa,$00
|
||||
.byte $a0,$aa,$a0
|
||||
|
||||
shadow_right:
|
||||
.byte $3,$2
|
||||
.byte $a0,$00,$aa
|
||||
.byte $00,$0a,$a0
|
||||
|
||||
shadow_left:
|
||||
.byte $3,$2
|
||||
.byte $aa,$00,$a0
|
||||
.byte $a0,$0a,$00
|
||||
|
||||
ship_forward:
|
||||
.byte $9,$5
|
||||
.byte $00,$00,$00,$00,$ff,$00,$00,$00,$00
|
||||
.byte $00,$00,$00,$66,$ff,$66,$00,$00,$00
|
||||
.byte $00,$00,$70,$2f,$12,$2f,$70,$00,$00
|
||||
.byte $f0,$f7,$f7,$f2,$d9,$f2,$f7,$f7,$f0
|
||||
.byte $00,$00,$00,$00,$0d,$00,$00,$00,$00
|
||||
|
||||
ship_right:
|
||||
.byte $9,$5
|
||||
.byte $00,$00,$00,$00,$00,$60,$60,$f0,$00
|
||||
.byte $00,$f0,$70,$70,$f6,$f6,$6f,$66,$00
|
||||
.byte $00,$07,$ff,$2f,$12,$27,$f6,$00,$00
|
||||
.byte $00,$00,$00,$dd,$d9,$f2,$77,$00,$00
|
||||
.byte $00,$00,$00,$00,$00,$0f,$ff,$70,$00
|
||||
|
||||
ship_left:
|
||||
.byte $9,$5
|
||||
.byte $00,$f0,$60,$60,$00,$00,$00,$00,$00
|
||||
.byte $00,$66,$6f,$f6,$f6,$70,$70,$f0,$00
|
||||
.byte $00,$00,$f6,$27,$12,$2f,$ff,$07,$00
|
||||
.byte $00,$00,$77,$f2,$d9,$dd,$00,$00,$00
|
||||
.byte $00,$70,$ff,$0f,$00,$00,$00,$00,$00
|
||||
|
||||
ship_small:
|
||||
.byte $5,$3
|
||||
.byte $00,$00,$ff,$00,$00
|
||||
.byte $00,$76,$2f,$76,$00
|
||||
.byte $0f,$0f,$d9,$0f,$0f
|
||||
|
||||
ship_tiny:
|
||||
.byte $3,$1
|
||||
.byte $f0,$9f,$f0
|
||||
|
||||
sphere_offset:
|
||||
.byte 0,27,54,81, 108,135,162,189
|
||||
|
||||
.if 0
|
||||
|
||||
sphere0:
|
||||
.byte $5,$5
|
||||
.byte $00,$b0,$b3,$b0,$00
|
||||
.byte $b0,$bb,$bb,$bb,$30
|
||||
.byte $bb,$bb,$bb,$bb,$33
|
||||
.byte $bb,$bb,$bb,$bb,$33
|
||||
.byte $00,$3b,$3b,$3b,$00
|
||||
|
||||
sphere1:
|
||||
.byte $5,$5
|
||||
.byte $00,$30,$bb,$b0,$00
|
||||
.byte $30,$bb,$bb,$bb,$b0
|
||||
.byte $bb,$bb,$bb,$bb,$bb
|
||||
.byte $bb,$bb,$bb,$bb,$bb
|
||||
.byte $00,$bb,$bb,$bb,$00
|
||||
|
||||
sphere2:
|
||||
.byte $5,$5
|
||||
.byte $00,$30,$b3,$b0,$00
|
||||
.byte $30,$b3,$bb,$bb,$b0
|
||||
.byte $33,$bb,$bb,$bb,$bb
|
||||
.byte $33,$bb,$bb,$bb,$bb
|
||||
.byte $00,$33,$3b,$3b,$00
|
||||
|
||||
sphere3:
|
||||
.byte $5,$5
|
||||
.byte $00,$30,$bb,$b0,$00
|
||||
.byte $30,$bb,$bb,$bb,$b0
|
||||
.byte $33,$3b,$bb,$bb,$bb
|
||||
.byte $33,$33,$3b,$bb,$bb
|
||||
.byte $00,$33,$33,$3b,$00
|
||||
|
||||
sphere4:
|
||||
.byte $5,$5
|
||||
.byte $00,$b0,$bb,$b0,$00
|
||||
.byte $30,$bb,$bb,$bb,$b0
|
||||
.byte $33,$33,$3b,$bb,$bb
|
||||
.byte $33,$33,$33,$33,$3b
|
||||
.byte $00,$33,$33,$33,$00
|
||||
|
||||
sphere5:
|
||||
.byte $5,$5
|
||||
.byte $00,$b0,$bb,$b0,$00
|
||||
.byte $30,$bb,$bb,$bb,$30
|
||||
.byte $33,$3b,$3b,$3b,$33
|
||||
.byte $33,$33,$33,$33,$33
|
||||
.byte $00,$33,$33,$33,$00
|
||||
|
||||
sphere6:
|
||||
.byte $5,$5
|
||||
.byte $00,$30,$bb,$b0,$00
|
||||
.byte $30,$bb,$bb,$bb,$30
|
||||
.byte $bb,$bb,$bb,$3b,$33
|
||||
.byte $33,$3b,$33,$33,$33
|
||||
.byte $00,$33,$33,$33,$00
|
||||
|
||||
sphere7:
|
||||
.byte $5,$5
|
||||
.byte $00,$30,$bb,$b0,$00
|
||||
.byte $b0,$bb,$bb,$bb,$30
|
||||
.byte $bb,$bb,$bb,$bb,$33
|
||||
.byte $bb,$bb,$bb,$3b,$33
|
||||
.byte $00,$33,$33,$33,$00
|
||||
.endif
|
||||
|
||||
sphere0:
|
||||
.byte $5,$5
|
||||
.byte $00,$30,$bb,$b0,$00
|
||||
.byte $b0,$bb,$bb,$bb,$30
|
||||
.byte $bb,$bb,$bb,$bb,$33
|
||||
.byte $bb,$bb,$bb,$3b,$33
|
||||
.byte $00,$33,$33,$33,$00
|
||||
|
||||
sphere1:
|
||||
.byte $5,$5
|
||||
.byte $00,$30,$bb,$b0,$00
|
||||
.byte $30,$bb,$bb,$bb,$30
|
||||
.byte $bb,$bb,$bb,$3b,$33
|
||||
.byte $33,$3b,$33,$33,$33
|
||||
.byte $00,$33,$33,$33,$00
|
||||
|
||||
sphere2:
|
||||
.byte $5,$5
|
||||
.byte $00,$b0,$bb,$b0,$00
|
||||
.byte $30,$bb,$bb,$bb,$30
|
||||
.byte $33,$3b,$3b,$3b,$33
|
||||
.byte $33,$33,$33,$33,$33
|
||||
.byte $00,$33,$33,$33,$00
|
||||
|
||||
sphere3:
|
||||
.byte $5,$5
|
||||
.byte $00,$b0,$bb,$b0,$00
|
||||
.byte $30,$bb,$bb,$bb,$b0
|
||||
.byte $33,$33,$3b,$bb,$bb
|
||||
.byte $33,$33,$33,$33,$3b
|
||||
.byte $00,$33,$33,$33,$00
|
||||
|
||||
sphere4:
|
||||
.byte $5,$5
|
||||
.byte $00,$30,$bb,$b0,$00
|
||||
.byte $30,$bb,$bb,$bb,$b0
|
||||
.byte $33,$3b,$bb,$bb,$bb
|
||||
.byte $33,$33,$3b,$bb,$bb
|
||||
.byte $00,$33,$33,$3b,$00
|
||||
|
||||
sphere5:
|
||||
.byte $5,$5
|
||||
.byte $00,$30,$b3,$b0,$00
|
||||
.byte $30,$b3,$bb,$bb,$b0
|
||||
.byte $33,$bb,$bb,$bb,$bb
|
||||
.byte $33,$bb,$bb,$bb,$bb
|
||||
.byte $00,$33,$3b,$3b,$00
|
||||
|
||||
sphere6:
|
||||
.byte $5,$5
|
||||
.byte $00,$30,$bb,$b0,$00
|
||||
.byte $30,$bb,$bb,$bb,$b0
|
||||
.byte $bb,$bb,$bb,$bb,$bb
|
||||
.byte $bb,$bb,$bb,$bb,$bb
|
||||
.byte $00,$bb,$bb,$bb,$00
|
||||
|
||||
sphere7:
|
||||
.byte $5,$5
|
||||
.byte $00,$b0,$b3,$b0,$00
|
||||
.byte $b0,$bb,$bb,$bb,$30
|
||||
.byte $bb,$bb,$bb,$bb,$33
|
||||
.byte $bb,$bb,$bb,$bb,$33
|
||||
.byte $00,$3b,$3b,$3b,$00
|
||||
|
||||
|
||||
|
||||
|
||||
sphere_shadow1:
|
||||
.byte $5,$1
|
||||
.byte $00,$a0,$a0,$a0,$00
|
||||
|
||||
sphere_shadow2:
|
||||
.byte $5,$1
|
||||
.byte $00,$00,$a0,$00,$00
|
||||
|
||||
87
megademo/mode7_zp.inc
Normal file
87
megademo/mode7_zp.inc
Normal file
|
|
@ -0,0 +1,87 @@
|
|||
;; Zero page monitor routines addresses
|
||||
|
||||
;; Flying Routine Only
|
||||
|
||||
TURNING = $60
|
||||
;SCREEN_X = $61 ; not used?
|
||||
SCREEN_Y = $62
|
||||
ANGLE = $63
|
||||
HORIZ_SCALE_I = $64
|
||||
HORIZ_SCALE_F = $65
|
||||
FACTOR_I = $66
|
||||
FACTOR_F = $67
|
||||
DX_I = $68
|
||||
DX_F = $69
|
||||
SPACEX_I = $6A
|
||||
SPACEX_F = $6B
|
||||
CX_I = $6C
|
||||
CX_F = $6D
|
||||
DY_I = $6E
|
||||
DY_F = $6F
|
||||
SPACEY_I = $70
|
||||
SPACEY_F = $71
|
||||
CY_I = $72
|
||||
CY_F = $73
|
||||
TEMP_I = $74
|
||||
TEMP_F = $75
|
||||
DISTANCE_I = $76
|
||||
DISTANCE_F = $77
|
||||
SPACEZ_I = $78
|
||||
SPACEZ_F = $79
|
||||
DRAW_SPLASH = $7A
|
||||
SPEED = $7B
|
||||
SPLASH_COUNT = $7C
|
||||
OVER_LAND = $7D
|
||||
NUM1L = $7E
|
||||
NUM1H = $7F
|
||||
NUM2L = $80
|
||||
NUM2H = $81
|
||||
RESULT = $82 ; 83,84,85
|
||||
;NEGATE = $86 ; UNUSED?
|
||||
LAST_SPACEX_I = $87
|
||||
LAST_SPACEY_I = $88
|
||||
LAST_MAP_COLOR = $89
|
||||
DRAW_SKY = $8A
|
||||
COLOR_MASK = $8B
|
||||
KEY_COUNT = $8C
|
||||
KEY_OFFSET = $8D
|
||||
DRAW_BLUE_SKY = $8E
|
||||
RANDOM_POINTER = $8F
|
||||
|
||||
MB_DETECTED = $96
|
||||
WHICH_CHUNK = $97
|
||||
|
||||
|
||||
; More zero-page addresses
|
||||
; we try not to conflict with anything DOS, MONITOR or BASIC related
|
||||
|
||||
COLOR1 = $E0
|
||||
COLOR2 = $E1
|
||||
MATCH = $E2
|
||||
XX = $E3
|
||||
|
||||
|
||||
SHIPY = $E4
|
||||
|
||||
YADD = $E5
|
||||
LOOP = $E6
|
||||
MEMPTRL = $E7
|
||||
MEMPTRH = $E8
|
||||
NAMEL = $E9
|
||||
NAMEH = $EA
|
||||
NAMEX = $EB
|
||||
CHAR = $EC
|
||||
|
||||
|
||||
FIRST = $F0
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
351
megademo/multiply_fast.s
Normal file
351
megademo/multiply_fast.s
Normal file
|
|
@ -0,0 +1,351 @@
|
|||
; Fast mutiply
|
||||
|
||||
|
||||
; Note for our purposes we only care about 8.8 x 8.8 fixed point
|
||||
; with 8.8 result, which means we only care about the middle two bytes
|
||||
; of the 32 bit result. So we disable generation of the high and low byte
|
||||
; to save some cycles.
|
||||
|
||||
;
|
||||
; The old routine took around 700 cycles for a 16bitx16bit=32bit mutiply
|
||||
; This routine, at an expense of 2kB of looku tables, takes around 250
|
||||
; If you reuse a term the next time this drops closer to 200
|
||||
|
||||
; This routine was described by Stephen Judd and found
|
||||
; in The Fridge and in the C=Hacking magazine
|
||||
; http://codebase64.org/doku.php?id=base:seriously_fast_multiplication
|
||||
|
||||
; The key thing to note is that
|
||||
; (a+b)^2 (a-b)^2
|
||||
; a*b = ------- - --------
|
||||
; 4 4
|
||||
; So if you have tables of the squares of 0..511 you can lookup and subtract
|
||||
; instead of multiplying.
|
||||
|
||||
; Table generation: I:0..511
|
||||
; square1_lo = <((I*I)/4)
|
||||
; square1_hi = >((I*I)/4)
|
||||
; square2_lo = <(((I-255)*(I-255))/4)
|
||||
; square2_hi = >(((I-255)*(I-255))/4)
|
||||
|
||||
; Note: DOS3.3 starts at $9600
|
||||
|
||||
.ifndef square1_lo
|
||||
square1_lo = $8E00
|
||||
square1_hi = $9000
|
||||
square2_lo = $9200
|
||||
square2_hi = $9400
|
||||
.endif
|
||||
|
||||
; for(i=0;i<512;i++) {
|
||||
; square1_lo[i]=((i*i)/4)&0xff;
|
||||
; square1_hi[i]=(((i*i)/4)>>8)&0xff;
|
||||
; square2_lo[i]=( ((i-255)*(i-255))/4)&0xff;
|
||||
; square2_hi[i]=(( ((i-255)*(i-255))/4)>>8)&0xff;
|
||||
; }
|
||||
|
||||
init_multiply_tables:
|
||||
|
||||
; Build the add tables
|
||||
|
||||
ldx #$00
|
||||
txa
|
||||
.byte $c9 ; CMP #immediate - skip TYA and clear carry flag
|
||||
lb1: tya
|
||||
adc #$00 ; 0
|
||||
ml1: sta square1_hi,x ; square1_hi[0]=0
|
||||
tay ; y=0
|
||||
cmp #$40 ; subtract 64 and update flags (c=0)
|
||||
txa ; a=0
|
||||
ror ; rotate
|
||||
ml9: adc #$00 ; add 0
|
||||
sta ml9+1 ; update add value
|
||||
inx ; x=1
|
||||
ml0: sta square1_lo,x ; square1_lo[0]=1
|
||||
bne lb1 ; if not zero, loop
|
||||
inc ml0+2 ; increment values
|
||||
inc ml1+2 ; increment values
|
||||
clc ; c=0
|
||||
iny ; y=1
|
||||
bne lb1 ; loop
|
||||
|
||||
; Build the subtract tables based on the existing one
|
||||
|
||||
ldx #$00
|
||||
ldy #$ff
|
||||
second_table:
|
||||
lda square1_hi+1,x
|
||||
sta square2_hi+$100,x
|
||||
lda square1_hi,x
|
||||
sta square2_hi,y
|
||||
lda square1_lo+1,x
|
||||
sta square2_lo+$100,x
|
||||
lda square1_lo,x
|
||||
sta square2_lo,y
|
||||
dey
|
||||
inx
|
||||
bne second_table
|
||||
|
||||
|
||||
rts
|
||||
|
||||
|
||||
; Fast 16x16 bit unsigned multiplication, 32-bit result
|
||||
; Input: NUM1H:NUM1L * NUM2H:NUM2L
|
||||
; Result: RESULT3:RESULT2:RESULT1:RESULT0
|
||||
;
|
||||
; Does self-modifying code to hard-code NUM1H:NUM1L into the code
|
||||
; carry=0: re-use previous NUM1H:NUM1L
|
||||
; carry=1: reload NUM1H:NUM1L (58 cycles slower)
|
||||
;
|
||||
; clobbered: RESULT, X, A, C
|
||||
; Allocation setup: T1,T2 and RESULT preferably on Zero-page.
|
||||
;
|
||||
; NUM1H (x_i), NUM1L (x_f)
|
||||
; NUM2H (y_i), NUM2L (y_f)
|
||||
|
||||
; NUM1L * NUM2L = AAaa
|
||||
; NUM1L * NUM2H = BBbb
|
||||
; NUM1H * NUM2L = CCcc
|
||||
; NUM1H * NUM2H = DDdd
|
||||
;
|
||||
; AAaa
|
||||
; BBbb
|
||||
; CCcc
|
||||
; + DDdd
|
||||
; ----------
|
||||
; RESULT
|
||||
|
||||
;fixed_16x16_mul_unsigned:
|
||||
|
||||
multiply:
|
||||
|
||||
bcc num1_same_as_last_time ; 2nt/3
|
||||
|
||||
;============================
|
||||
; Set up self-modifying code
|
||||
; this changes the code to be hard-coded to multiply by NUM1H:NUM1L
|
||||
;============================
|
||||
|
||||
lda NUM1L ; load the low byte ; 3
|
||||
sta sm1a+1 ; 3
|
||||
sta sm3a+1 ; 3
|
||||
sta sm5a+1 ; 3
|
||||
sta sm7a+1 ; 3
|
||||
eor #$ff ; invert the bits for subtracting ; 2
|
||||
sta sm2a+1 ; 3
|
||||
sta sm4a+1 ; 3
|
||||
sta sm6a+1 ; 3
|
||||
sta sm8a+1 ; 3
|
||||
lda NUM1H ; load the high byte ; 3
|
||||
sta sm1b+1 ; 3
|
||||
sta sm3b+1 ; 3
|
||||
sta sm5b+1 ; 3
|
||||
; sta sm7b+1 ;
|
||||
eor #$ff ; invert the bits for subtractin ; 2
|
||||
sta sm2b+1 ; 3
|
||||
sta sm4b+1 ; 3
|
||||
sta sm6b+1 ; 3
|
||||
; sta sm8b+1 ;
|
||||
;===========
|
||||
; 52
|
||||
|
||||
num1_same_as_last_time:
|
||||
|
||||
;==========================
|
||||
; Perform NUM1L * NUM2L = AAaa
|
||||
;==========================
|
||||
|
||||
ldx NUM2L ; (low le) ; 3
|
||||
sec ; 2
|
||||
sm1a:
|
||||
lda square1_lo,x ; 4
|
||||
sm2a:
|
||||
sbc square2_lo,x ; 4
|
||||
|
||||
; a is _aa
|
||||
|
||||
; sta RESULT+0 ;
|
||||
|
||||
sm3a:
|
||||
lda square1_hi,x ; 4
|
||||
sm4a:
|
||||
sbc square2_hi,x ; 4
|
||||
; a is _AA
|
||||
sta _AA+1 ; 3
|
||||
;===========
|
||||
; 24
|
||||
|
||||
; Perform NUM1H * NUM2L = CCcc
|
||||
sec ; 2
|
||||
sm1b:
|
||||
lda square1_lo,x ; 4
|
||||
sm2b:
|
||||
sbc square2_lo,x ; 4
|
||||
; a is _cc
|
||||
sta _cc+1 ; 3
|
||||
sm3b:
|
||||
lda square1_hi,x ; 4
|
||||
sm4b:
|
||||
sbc square2_hi,x ; 4
|
||||
; a is _CC
|
||||
sta _CC+1 ; 3
|
||||
;===========
|
||||
; 24
|
||||
|
||||
;==========================
|
||||
; Perform NUM1L * NUM2H = BBbb
|
||||
;==========================
|
||||
ldx NUM2H ; 3
|
||||
sec ; 2
|
||||
sm5a:
|
||||
lda square1_lo,x ; 4
|
||||
sm6a:
|
||||
sbc square2_lo,x ; 4
|
||||
; a is _bb
|
||||
sta _bb+1 ; 3
|
||||
|
||||
sm7a:
|
||||
lda square1_hi,x ; 4
|
||||
sm8a:
|
||||
sbc square2_hi,x ; 4
|
||||
; a is _BB
|
||||
sta _BB+1 ; 3
|
||||
;===========
|
||||
; 27
|
||||
|
||||
;==========================
|
||||
; Perform NUM1H * NUM2H = DDdd
|
||||
;==========================
|
||||
sec ; 2
|
||||
sm5b:
|
||||
lda square1_lo,x ; 4
|
||||
sm6b:
|
||||
sbc square2_lo,x ; 4
|
||||
; a is _dd
|
||||
sta _dd+1 ; 3
|
||||
;sm7b:
|
||||
; lda square1_hi,x ;
|
||||
;sm8b:
|
||||
; sbc square2_hi,x ;
|
||||
; a = _DD
|
||||
; sta RESULT+3 ;
|
||||
;===========
|
||||
; 13
|
||||
|
||||
;===========================================
|
||||
; Add the separate multiplications together
|
||||
;===========================================
|
||||
|
||||
clc ; 2
|
||||
_AA:
|
||||
lda #0 ; loading _AA ; 2
|
||||
_bb:
|
||||
adc #0 ; adding in _bb ; 2
|
||||
sta RESULT+1 ; 3
|
||||
;==========
|
||||
; 9
|
||||
; product[2]=_BB+_CC+c
|
||||
|
||||
_BB:
|
||||
lda #0 ; loading _BB ; 2
|
||||
_CC:
|
||||
adc #0 ; adding in _CC ; 2
|
||||
sta RESULT+2 ; 3
|
||||
;===========
|
||||
; 7
|
||||
|
||||
; product[3]=_DD+c
|
||||
|
||||
; bcc dd_no_carry1 ;
|
||||
; inc RESULT+3 ;
|
||||
clc ; 2
|
||||
;=============
|
||||
; 2
|
||||
dd_no_carry1:
|
||||
|
||||
; product[1]=_AA+_bb+_cc
|
||||
|
||||
_cc:
|
||||
lda #0 ; load _cc ; 2
|
||||
adc RESULT+1 ; 3
|
||||
sta RESULT+1 ; 3
|
||||
|
||||
; product[2]=_BB+_CC+_dd+c
|
||||
|
||||
_dd:
|
||||
lda #0 ; load _dd ; 2
|
||||
adc RESULT+2 ; 3
|
||||
sta RESULT+2 ; 3
|
||||
|
||||
;===========
|
||||
; 16
|
||||
; product[3]=_DD+c
|
||||
|
||||
|
||||
; bcc dd_no_carry2 ;
|
||||
; inc RESULT+3 ;
|
||||
|
||||
;=============
|
||||
; 0
|
||||
|
||||
dd_no_carry2:
|
||||
|
||||
; *z_i=product[1];
|
||||
; *z_f=product[0];
|
||||
|
||||
; rts ; 6
|
||||
|
||||
|
||||
;=================
|
||||
; Signed multiply
|
||||
;=================
|
||||
|
||||
;multiply:
|
||||
|
||||
; jsr fixed_16x16_mul_unsigned ; 6
|
||||
|
||||
lda NUM1H ; x_i ; 3
|
||||
;===========
|
||||
; 12
|
||||
|
||||
|
||||
bpl x_positive ;^3/2nt
|
||||
|
||||
sec ; 2
|
||||
lda RESULT+2 ; 3
|
||||
sbc NUM2L ; 3
|
||||
sta RESULT+2 ; 3
|
||||
; lda RESULT+3 ;
|
||||
; sbc NUM2H ;
|
||||
; sta RESULT+3 ;
|
||||
;============
|
||||
; 10
|
||||
|
||||
x_positive:
|
||||
|
||||
lda NUM2H ; y_i ; 3
|
||||
;============
|
||||
; ; 6
|
||||
|
||||
bpl y_positive ;^3/2nt
|
||||
|
||||
|
||||
sec ; 2
|
||||
lda RESULT+2 ; 3
|
||||
sbc NUM1L ; 3
|
||||
sta RESULT+2 ; 3
|
||||
; lda RESULT+3 ;
|
||||
; sbc NUM1H ;
|
||||
; sta RESULT+3 ;
|
||||
;===========
|
||||
; 10
|
||||
|
||||
y_positive:
|
||||
ldx RESULT+2 ; *z_i=product[2]; ; 3
|
||||
lda RESULT+1 ; *z_f=product[1]; ; 3
|
||||
|
||||
rts ; 6
|
||||
;==========
|
||||
; 12
|
||||
|
||||
10
megademo/starry_sky.scroll
Normal file
10
megademo/starry_sky.scroll
Normal file
|
|
@ -0,0 +1,10 @@
|
|||
; Original size = 1020 bytes
|
||||
sky_background:
|
||||
; scroll_length:
|
||||
.byte 255
|
||||
.byte $A9,$00,$D0,$A9,$00,$50,$F5,$50,$AB,$00,$0F,$A7,$00,$0D,$DD,$D0,$A7,$00,$F0,$A5,$00,$11,$A7,$00,$A4,$70,$D0,$D0,$A7,$00,$70,$A9,$00,$05,$A0,$11,$00,$0F,$A0,$11,$00,$D0,$A0,$12,$00,$50,$A0,$2F,$00,$D0,$A9,$00,$50,$F5,$50,$AB,$00,$0F,$A0,$28,$00
|
||||
.byte $A5,$00,$0F,$A6,$00,$F0,$A4,$00,$0F,$00,$00,$05,$A9,$00,$0F,$A4,$00,$05,$A7,$00,$DD,$A7,$00,$0F,$00,$F0,$00,$F0,$A8,$00,$07,$70,$A4,$75,$FF,$FF,$F0,$A0,$11,$00,$F0,$A5,$00,$05,$A5,$00,$07,$A0,$11,$00,$50,$A0,$1D,$00,$0F,$A0,$18,$00,$05,$AB,$00,$0F,$A6,$00,$F0,$A4,$00,$0F,$00,$00,$05,$A9,$00,$0F,$A4,$00,$05,$A0,$26,$00
|
||||
.byte $00,$00,$F0,$AA,$00,$F0,$00,$00,$F0,$A7,$00,$07,$A4,$00,$70,$AB,$00,$D0,$DD,$0D,$A5,$00,$D0,$A5,$00,$0F,$A8,$00,$07,$70,$05,$75,$75,$D5,$DF,$0F,$A5,$00,$F0,$A5,$00,$50,$A0,$19,$00,$50,$A4,$00,$0D,$AE,$00,$0F,$A5,$00,$07,$A8,$00,$D0,$AB,$00,$07,$AB,$00,$0F,$AF,$00,$F0,$AA,$00,$F0,$00,$00,$F0,$A7,$00,$07,$A4,$00,$70,$A0,$2C,$00
|
||||
.byte $A0,$40,$00,$07,$A0,$BF,$00
|
||||
.byte $A1
|
||||
; Compressed size = 231 bytes
|
||||
|
|
@ -1,3 +1,7 @@
|
|||
;; Zero Page
|
||||
|
||||
FRAMEBUFFER = $00 ; $00 - $0F
|
||||
|
||||
;; LZ4 addresses
|
||||
|
||||
LZ4_SRC = $00
|
||||
|
|
@ -46,7 +50,7 @@ LETTERX = $65
|
|||
LETTERY = $66
|
||||
LETTERD = $67
|
||||
LETTER = $68
|
||||
|
||||
BLARGH = $69
|
||||
|
||||
;FACTOR_I = $66
|
||||
;FACTOR_F = $67
|
||||
|
|
@ -122,6 +126,7 @@ CURSOR = $9D
|
|||
;MATCH = $E2
|
||||
;XX = $E3
|
||||
YY = $E4
|
||||
HGR_COLOR = $E4
|
||||
;SHIPY = $E4
|
||||
;YADD = $E5
|
||||
;LOOP = $E6
|
||||
|
|
@ -131,12 +136,16 @@ YY = $E4
|
|||
;NAMEH = $EA
|
||||
;NAMEX = $EB
|
||||
;CHAR = $EC
|
||||
STATE = $ED
|
||||
DISP_PAGE = $ED
|
||||
DRAW_PAGE = $EE
|
||||
OFFSET = $EF
|
||||
|
||||
;FIRST = $F0
|
||||
;LASTKEY = $F1
|
||||
;PADDLE_STATUS = $F2
|
||||
|
||||
LASTKEY = $F1
|
||||
PADDLE_STATUS = $F2
|
||||
|
||||
SPRITETEMP = $F2
|
||||
XPOS = $F3
|
||||
YPOS = $F4
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user