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leaving: add state machine

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This commit is contained in:
Vince Weaver 2018-10-15 14:26:15 -04:00
parent 111b4d2d64
commit 080a2bf302
1 changed files with 38 additions and 6 deletions
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44
megademo/leaving.s
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@ -123,9 +123,10 @@ lv_begin_loop:
; 3120
; -4 set_text
; -25 inc frame
; -17 set state
; -8 check if done
;=======
; 3083
; 3066
bit SET_TEXT ; 4
@ -160,19 +161,50 @@ lv_no_carry:
;=================
lda FRAMEH ; 3
cmp #25 ; 2
cmp #30 ; 2
bne lv_not_done ; 3
jmp lv_all_done
lv_not_done:
;===========
; 8
; Try X=204 Y=3 cycles=3079 R4
nop
; Set the state
; STATE0 = 5+4+(5)+3 = 17
; STATE2 = 5+5+4+3 = 17
; STATE4 = 5+5+2+3+(2) =17
cmp #5 ; 2
bcs lv_state_notzero ; bge ; 3
lv_state_zero:
; -1
lda $0 ; nop ; 3
nop ; 2
ldx #0 ; 2
jmp lv_set_state ; 3
lv_state_notzero:
cmp #20 ; 2
bcs lv_state_four ; bge ; 3
lv_state_two:
; -1
ldx #2 ; 2
jmp lv_set_state ; 3
lv_state_four:
nop ; 2
ldx #4 ; 2
lv_set_state:
stx STATE ; 3
; Try X=203 Y=3 cycles=3064 R2
nop
ldy #3 ; 2
lvloop8:ldx #204 ; 2
lvloop8:ldx #203 ; 2
lvloop9:dex ; 2
bne lvloop9 ; 2nt/3
dey ; 2
@ -190,7 +222,7 @@ lvloop7:dex ; 2
bne lvloop6 ; 2nt/3
;===============================
; do stuff
; Draw All the Sprites
;===============================
jsr erase_yard ; 6+1249