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sprites: only fire one shot at a time now

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This commit is contained in:
Vince Weaver 2019-06-13 11:05:27 -04:00
parent 0a619ddef0
commit 37c4277680
1 changed files with 24 additions and 13 deletions
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37
interlace_demo/sprites.s
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@ -228,10 +228,10 @@ display_loop:
; -17 -- move fire
; -428 -- draw fire (61*7)+1
; -61 -- keypress
; -28 -- handle fire press
; -33 -- handle fire press
; -8 -- loop
;=======
; 1160
; 1155
;================
; erase old ship
@ -542,12 +542,14 @@ pad_time:
wait_loop:
; Try X=11 Y=19 cycles=1160
; nop
; Try X=2 Y=72 cycles=1153 R2
nop
; nop
ldy #19 ; 2
loop1: ldx #11 ; 2
ldy #72 ; 2
loop1: ldx #2 ; 2
loop2: dex ; 2
bne loop2 ; 2nt/3
dey ; 2
@ -561,14 +563,18 @@ wait_loop_end:
;===============
; handle fire
; FIRE: 28
; no FIRE: 6 [22]
; FIRE: 6+5+17+5 = 33
; FIRE but OUT: 6+5+5 = 16 [17]
; no FIRE: 6+5 = 11 [22]
; urgh pain to make this invariant
lda FIRE ; 3
beq no_firing ; 3
beq no_firing2 ; 3
; -1
lda FIRE_X ; 3
bne no_firing ; 3
; -1
lda #0 ; 2
sta FIRE ; 3
clc ; 2
lda YPOS ; 3
@ -580,14 +586,19 @@ wait_loop_end:
jmp really_no_firing ; 3
no_firing2:
inc TEMP ; 5
no_firing:
inc TEMP ; 5
inc TEMP ; 5
inc TEMP ; 5
inc TEMP ; 3
nop ; 2
really_no_firing:
lda #0 ; 2
sta FIRE ; 3
;===============
; check for end
@ -639,7 +650,7 @@ key_not_escape:
cmp #' '+$80 ; 2
bne key_not_space ; 3
; -1
lda #1 ; 2
lda #$ff ; 2
sta FIRE ; 3
jmp key_delay_22 ; 3