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sprites: bullets no longer hang out at X=0

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now they hang out at x=39
This commit is contained in:
Vince Weaver 2019-06-13 11:16:06 -04:00
parent 37c4277680
commit bfe30981a9
1 changed files with 26 additions and 7 deletions
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33
interlace_demo/sprites.s
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@ -226,12 +226,12 @@ display_loop:
; -167 -- erase fire ; -167 -- erase fire
; -31 -- move ship ; -31 -- move ship
; -17 -- move fire ; -17 -- move fire
; -428 -- draw fire (61*7)+1 ; -436 -- draw fire
; -61 -- keypress ; -61 -- keypress
; -33 -- handle fire press ; -33 -- handle fire press
; -8 -- loop ; -8 -- loop
;======= ;=======
; 1155 ; 1147
;================ ;================
; erase old ship ; erase old ship
@ -469,14 +469,19 @@ done_move:
;========================== ;==========================
; draw the fire ; draw the fire
;========================== ;==========================
; 6+(61*7)+3 = 436
lda FIRE_X ; 3
beq no_draw_fire ; 3
; -1
ldy FIRE_Y ; 3 ldy FIRE_Y ; 3
; line 0 ; line 0
ldx #0 ; 2 ldx #0 ; 2
jsr fire_line ; 6+51 jsr fire_line ; 6+51
;==== ;====
; 59 ; 61
; line 1 ; line 1
iny ; 2 iny ; 2
@ -520,7 +525,21 @@ done_move:
;==== ;====
; 61 ; 61
jmp done_draw_fire ; 3
no_draw_fire:
; delay 436-6 = 430
; delay 200
lda #(200-25-2)
jsr delay_a
; delay 230
lda #(230-25-2)
jsr delay_a
done_draw_fire:
pad_time: pad_time:
@ -543,13 +562,13 @@ pad_time:
wait_loop: wait_loop:
; Try X=2 Y=72 cycles=1153 R2 ; Try X=37 Y=6 cycles=1147
nop ; nop
; nop ; nop
ldy #72 ; 2 ldy #6 ; 2
loop1: ldx #2 ; 2 loop1: ldx #37 ; 2
loop2: dex ; 2 loop2: dex ; 2
bne loop2 ; 2nt/3 bne loop2 ; 2nt/3
dey ; 2 dey ; 2