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sprites: firing, closer

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This commit is contained in:
Vince Weaver
2019-06-12 23:52:22 -04:00
parent fb6801bc84
commit be2645069d
1 changed files with 12 additions and 9 deletions
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21
interlace_demo/sprites.s
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@@ -227,10 +227,10 @@ display_loop:
; -17 -- move fire ; -17 -- move fire
; -306 -- draw fire (61*5)+1 ; -306 -- draw fire (61*5)+1
; -61 -- keypress ; -61 -- keypress
; -24 -- handle fire press ; -28 -- handle fire press
; -8 -- loop ; -8 -- loop
;======= ;=======
; 1453 ; 1449
;================ ;================
; erase old ship ; erase old ship
@@ -287,7 +287,7 @@ display_loop:
lda FIRE_X ; 3 lda FIRE_X ; 3
beq no_fire ; 3 beq no_fire ; 3
; -1 ; -1
cmp #$39 ; 2 cmp #39 ; 2
bcs kill_fire ; bge 3 bcs kill_fire ; bge 3
; -1 ; -1
inc FIRE_X ; 5 inc FIRE_X ; 5
@@ -509,10 +509,10 @@ pad_time:
wait_loop: wait_loop:
; Try X=1 Y=132 cycles=1453 ; Try X=35 Y=8 cycles=1449
ldy #132 ; 2 ldy #8 ; 2
loop1: ldx #1 ; 2 loop1: ldx #35 ; 2
loop2: dex ; 2 loop2: dex ; 2
bne loop2 ; 2nt/3 bne loop2 ; 2nt/3
dey ; 2 dey ; 2
@@ -526,8 +526,8 @@ wait_loop_end:
;=============== ;===============
; handle fire ; handle fire
; FIRE: 24 ; FIRE: 28
; no FIRE: 6 [18] ; no FIRE: 6 [22]
lda FIRE ; 3 lda FIRE ; 3
beq no_firing ; 3 beq no_firing ; 3
@@ -535,7 +535,9 @@ wait_loop_end:
lda #0 ; 2 lda #0 ; 2
sta FIRE ; 3 sta FIRE ; 3
clc ; 2
lda YPOS ; 3 lda YPOS ; 3
adc #$4 ; 2
sta FIRE_Y ; 3 sta FIRE_Y ; 3
lda #7 ; 2 lda #7 ; 2
@@ -547,7 +549,8 @@ no_firing:
inc TEMP ; 5 inc TEMP ; 5
inc TEMP ; 5 inc TEMP ; 5
inc TEMP ; 5 inc TEMP ; 5
lda TEMP ; 3 inc TEMP ; 3
nop ; 2
really_no_firing: really_no_firing: