trogdor: vertical scroll
This commit is contained in:
Vince Weaver
parent
ee0ae37c89
commit
bcd68fd7ed
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@ -165,7 +165,8 @@ trogdor.o: trogdor.s \
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flames.inc \
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zp.inc hardware.inc qload.inc \
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graphics/trog00_trogdor.hgr.zx02 \
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hgr_sprite_big_mask.s horiz_scroll_simple.s hgr_copy_magnify.s
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hgr_sprite_big_mask.s horiz_scroll_simple.s hgr_copy_magnify.s \
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horiz_scroll_skip.s vertical_scroll.s
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ca65 -o trogdor.o trogdor.s -l trogdor.lst
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@ -49,7 +49,7 @@ magnify_outer_loop:
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sta GBASH
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ldy #0
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ldy #0 ; 2
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magnify_inner_loop:
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lda (INL),Y ; 5
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and #$f ; 2
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@ -0,0 +1,119 @@
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;======================================
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; do very simple horizontal scroll
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;======================================
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; skips by 4 because we need fairly high FPS
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; originally ~12 seconds to scroll 80 (twice)
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; also assumes every-other line the same
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; screens to pan in $2000/$4000 to left
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horiz_pan_skip:
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pan_loop:
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; how many times to scroll
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lda #0
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sta COUNT
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pan_outer_outer_loop:
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ldx #191
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pan_outer_loop:
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txa
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pha
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; self-modify the PAGE1 high input addresses
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lda hposn_high,X
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sta pil_in_smc1+2 ; input source
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sta pil_out_smc1+2 ; output odd
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sta pil_out_smc4+2
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;self modify the PAGE2 high input addresses
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eor #$60
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sta pil_in_page2_smc1+2
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; self modify the PAGE1 LOW addresses
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lda hposn_low,X
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sta pil_out_smc1+1 ; output odd
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sta pil_out_smc4+1 ; output odd
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; self modify the PAGE1 LOW input addresses
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sta pil_in_smc1+1 ; input is regular+1
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inc pil_in_smc1+1
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; offset in PAGE2 to get input from
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clc
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adc COUNT
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sta pil_in_page2_smc1+1
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inx
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lda hposn_high,X
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sta pil_out_smc2+2 ; output even high
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sta pil_out_smc5+2
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lda hposn_low,X ; output even low
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sta pil_out_smc2+1
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sta pil_out_smc5+1
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;=========================
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; inner loop, from 0-39
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ldy #0
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pan_inner_loop:
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; load in+1, store to in
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; if completely unrolled, would save 1 cycle for store and
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; 5 for the branch/loop
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; 192*6=not a lot
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pil_in_smc1:
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lda $2000+1,Y ; 4
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pil_out_smc1:
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sta $2000,Y ; 5
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pil_out_smc2:
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sta $2000,Y ; 5
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iny ; 2
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cpy #39 ; 2
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bne pan_inner_loop ; 2/3
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; for right edge, scroll in from PAGE2
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pil_in_page2_smc1:
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lda $4000
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pil_out_smc4:
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sta $2000,Y
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pil_out_smc5:
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sta $2000,Y
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pla
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tax
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dex
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dex
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cpx #$ff
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bne pan_outer_loop
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inc COUNT
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lda COUNT
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cmp #39
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bne pan_outer_outer_loop
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rts
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@ -1,6 +1,6 @@
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;==================================
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;======================================
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; do very simple horizontal scroll
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;==================================
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;======================================
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; screens to pan in $2000/$4000 to left
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@ -8,43 +8,66 @@ horiz_pan:
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pan_loop:
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; how many times to scroll
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lda #0
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sta COUNT
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pan_outer_outer_loop:
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; do all 191 lines
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ldx #191
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pan_outer_loop:
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; self-modify the PAGE1 high addresses
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lda hposn_high,X
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sta pil_smc1+2
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sta pil_smc2+2
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sta pil_smc4+2
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;self modify the PAGE2 high addresses
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eor #$60
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sta pil_smc3+2
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; self modify the PAGE1 LOW addresses
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lda hposn_low,X
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sta pil_smc2+1
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sta pil_smc4+1
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; self mofidy the PAGE1 LOW input addresses
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sta pil_smc1+1
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inc pil_smc1+1
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clc
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adc COUNT
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sta pil_smc3+1
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;=========================
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; inner loop, from 0-39
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ldy #0
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pan_inner_loop:
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pil_smc1:
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lda $2000+1,Y
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pil_smc2:
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sta $2000,Y
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; load in+1, store to in
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iny
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cpy #39
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bne pan_inner_loop
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; if completely unrolled, would save 1 cycle for store and
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; 5 for the branch/loop
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; 192*6=not a lot
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pil_smc1:
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lda $2000+1,Y ; 4
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pil_smc2:
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sta $2000,Y ; 5
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iny ; 2
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cpy #39 ; 2
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bne pan_inner_loop ; 2/3
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; for right edge, scroll in from PAGE2
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pil_smc3:
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lda $4000
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@ -55,8 +78,6 @@ pil_smc4:
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cpx #$ff
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bne pan_outer_loop
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; jsr wait_until_keypress
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inc COUNT
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lda COUNT
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cmp #39
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@ -0,0 +1,133 @@
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;======================================
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; do very simple horizontal scroll
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;======================================
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; skips by 4 because we need fairly high FPS
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; originally ~12 seconds to scroll 80 (twice)
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; made double high, ~8s
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; screens to pan in $2000/$4000 to left
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horiz_pan_skip:
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pan_loop:
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; how many times to scroll
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lda #0
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sta COUNT
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pan_outer_outer_loop:
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ldx #191
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pan_outer_loop:
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txa
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pha
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; self-modify the PAGE1 high input addresses
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lda hposn_high,X
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sta pil_in_smc1+2 ; input source
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sta pil_out_smc1+2 ; output odd
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sta pil_out_smc4+2
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;self modify the PAGE2 high input addresses
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eor #$60
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sta pil_in_page2_smc1+2
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; self modify the PAGE1 LOW addresses
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lda hposn_low,X
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sta pil_out_smc1+1 ; output odd
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sta pil_out_smc4+1 ; output odd
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; self modify the PAGE1 LOW input addresses
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sta pil_in_smc1+1 ; input is regular+1
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inc pil_in_smc1+1
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inc pil_in_smc1+1
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inc pil_in_smc1+1
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inc pil_in_smc1+1
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; offset in PAGE2 to get input from
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clc
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adc COUNT
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sta pil_in_page2_smc1+1
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inx
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lda hposn_high,X
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sta pil_out_smc2+2 ; output even high
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sta pil_out_smc5+2
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lda hposn_low,X ; output even low
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sta pil_out_smc2+1
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sta pil_out_smc5+1
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;=========================
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; inner loop, from 0-36
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ldy #0
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pan_inner_loop:
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; load in+1, store to in
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; if completely unrolled, would save 1 cycle for store and
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; 5 for the branch/loop
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; 192*6=not a lot
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pil_in_smc1:
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lda $2000+1,Y ; 4
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pil_out_smc1:
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sta $2000,Y ; 5
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pil_out_smc2:
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sta $2000,Y ; 5
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iny ; 2
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cpy #36 ; 2
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bne pan_inner_loop ; 2/3
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; for right edge, scroll in from PAGE2
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ldx #0
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tail_loop:
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pil_in_page2_smc1:
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lda $4000,X
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pil_out_smc4:
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sta $2000,Y
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pil_out_smc5:
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sta $2000,Y
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iny
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inx
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cpy #40
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bne tail_loop
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pla
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tax
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dex
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dex
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cpx #$ff
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bne pan_outer_loop
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inc COUNT
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inc COUNT
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inc COUNT
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inc COUNT
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lda COUNT
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cmp #36
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bne pan_outer_outer_loop
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rts
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@ -209,7 +209,7 @@ load_trogdor:
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;=======================
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;=======================
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cli ; start music
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; cli ; start music
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jsr $8000
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@ -32,6 +32,15 @@ trogdor_main:
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lda #$20
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sta DRAW_PAGE
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lda SOUND_STATUS
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and #SOUND_MOCKINGBOARD
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beq trog_no_music
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cli ; start music
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trog_no_music:
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;======================================
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; draw SCENE 1
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;======================================
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@ -53,13 +62,13 @@ trogdor_main:
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lda #$60
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jsr hgr_copy_magnify
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jsr horiz_pan
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jsr horiz_pan_skip
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; clear to white
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ldy #$7f
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jsr hgr_clear_screen
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jsr horiz_pan
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jsr horiz_pan_skip
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jsr hgr_page_flip
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@ -244,6 +253,49 @@ left_flame_animate2:
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jsr hgr_clear_screen
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jsr hgr_page_flip
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;======================================
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; draw SCENE 2
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;======================================
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; scroll trogdor intro place
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; takes rougly 90 frames (3s) to scroll in
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; remains there 10 frames (almost .5s)
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; orignal: 28s, want 9 times faster???
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; can easily do 8 times...
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; now should be on PAGE1??
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ldy #$7f
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jsr hgr_clear_screen
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jsr hgr_page_flip
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; lda #24 ; 192/8
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; sta ANIMATE_COUNT
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lda #0
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sta COUNT
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scroll_in_loop:
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jsr hgr_vertical_scroll
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lda COUNT
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clc
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adc #8
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cmp #192
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bne scroll_in_loop
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lda #10
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jsr wait_ticks
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;=======================================
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jsr wait_until_keypress
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; second
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@ -295,8 +347,9 @@ hposn_low = $1e00
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hposn_high = $1f00
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.include "hgr_sprite_big_mask.s"
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.include "horiz_scroll_simple.s"
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.include "horiz_scroll_skip.s"
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.include "hgr_copy_magnify.s"
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.include "vertical_scroll.s"
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;===============================
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; draw_flame_small
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@ -0,0 +1,79 @@
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;=======================================
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; scrolls to PAGE1
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; relies on going off the edge...
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;=======================================
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hgr_vertical_scroll:
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ldx #0
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outer_vscroll_loop:
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lda hposn_low,X
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sta OUTL
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lda hposn_high,X
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sta OUTH
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txa
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clc
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adc #8
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tay
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lda hposn_low,y
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sta INL
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lda hposn_high,Y
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sta INH
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ldy #29
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inner_vscroll_loop:
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lda (INL),Y
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sta (OUTL),Y
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dey
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cpy #9
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bpl inner_vscroll_loop
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inx
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cpx #184
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bne outer_vscroll_loop
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;================================
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; copy in off screen
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; for now from 0..19
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hgr_vertical_scroll2:
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ldx #184
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outer_vscroll_loop2:
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lda hposn_low,X
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clc
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adc #10
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sta OUTL
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lda hposn_high,X
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sta OUTH
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ldy COUNT
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lda hposn_low,Y
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sta INL
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lda hposn_high,Y
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clc
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adc #$40 ; load from $6000
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sta INH
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ldy #19
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inner_vscroll_loop2:
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lda (INL),Y
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sta (OUTL),Y
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dey
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bpl inner_vscroll_loop2
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inc COUNT
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inx
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cpx #192
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bne outer_vscroll_loop2
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rts
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