Apple-2-SW/dos33fsprogs
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split: half transparent works

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This commit is contained in:
Vince Weaver 2018-07-05 19:49:10 -04:00
parent 723ec5b1bf
commit 61fdf15000
3 changed files with 22 additions and 16 deletions
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2
split_screen/calc_freq.c
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@ -9,7 +9,7 @@ int main(int argc, char **argv) {
// desired=5196;
// desired=4547;
// desired=9685;
desired=4065;
desired=3759;
printf("You want %d cycles\n",desired);

30
split_screen/credits.s
View File

@ -290,25 +290,25 @@ loop6:
;=========
; 26
; + 456
; + 762
;========
; 482
; 788
; blob= 482
; 4547 - 482
; 4065 is new number
; Try X=2 Y=254 cycles=4065
; blob= 788
; 4547 - 788
; 3759 is new number
; Try X=124 Y=6 cycles=3757 R2
; lda #0 ; 2
lda #0 ; 2
; lda #0 ; 2
ldy #254 ; 2
ldy #6 ; 2
loop7:
ldx #2 ; 2
ldx #124 ; 2
loop8:
dex ; 2
bne loop8 ; 2nt/3
@ -341,20 +341,22 @@ wait_until_keypressed:
; X*innerloop
; innerloop = 30 if $00 17+13(done)
; 54 if if $XX 16+8+8+9(put_all)+13(done)
; 68 if $X0 16+8+7+5+19(put_sprite_mask)+13(done)
; 63 if $0X 16+7+8+19(put_sprite_mask)+13(done)
; 68 if $X0 16+8+7+5+20(put_sprite_mask)+13(done)
; 64 if $0X 16+7+8+20(put_sprite_mask)+13(done)
; -1 for last iteration
; 18 (-1 for last)
; 6 return
; so cost = 28 + Y*(34+18)+ (INNER-X) -1 + 6
; = 33 + Y*(52)+(INNER-X)
; = 33 + Y*(52)+ [30A + 54B + 68C + 63D]-X
; = 33 + Y*(52)+ [30A + 54B + 68C + 64D]-X
; solid $XX, x=3, y=3, B=9
; 33 + 3*(52)+[54*9]-3 = 672
; solid $00, x=3, y=3, A=9
; 33 + 3*(52)+[30*9]-3 = 456
; solid $0x, x=3, y=3, D=9
; 33 + 3*(52)+[64*9]-3 = 762
; bird_stand_right = X=6, Y=7 A=28 B=9 C=2 D=3
; = 33 + 7*53+(30*28+53*9+68*2+63*3)-6 = 2040 cycles
@ -429,6 +431,8 @@ put_sprite_bottom:
lda #$0f ; 2
sta MASK ; setup mask ; 3
;===========
; 5
put_sprite_mask:
lda (OUTL),Y ; get color at output ; 5
@ -437,6 +441,8 @@ put_sprite_mask:
sta (OUTL),Y ; store it back ; 6
jmp put_sprite_done_draw ; we are done ; 3
;===========
; 20
put_sprite_all:
lda COLOR ; load color ; 3

6
split_screen/tfv_sprites.inc
View File

@ -35,6 +35,6 @@ big_tree:
blob:
.byte $3,$3
.byte $00,$00,$00
.byte $00,$00,$00
.byte $00,$00,$00
.byte $01,$02,$03
.byte $04,$05,$06
.byte $07,$08,$09