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xmas2019: slow to 30Hz

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doesn't look as good, change the sine tables?
This commit is contained in:
Vince Weaver 2019-12-19 11:56:06 -05:00
parent 7b606bdf01
commit cbd11b0185
2 changed files with 59 additions and 18 deletions
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3
xmas_2019/TODO Normal file
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@ -0,0 +1,3 @@
+ Make SINE twice as fast (64 instead of 128 entries?)
+ Add snow
+ Add music

74
xmas_2019/xmas2019.s
View File

@ -21,6 +21,7 @@ COLOR = $F1
CMASK1 = $F2
CMASK2 = $F3
WHICH_Y = $F4
FRAME = $F5
TREESIZE = 12
@ -29,6 +30,10 @@ TREESIZE = 12
;==================================
;==================================
; Init
lda #0
sta FRAME
bit SET_GR
bit FULLGR
@ -152,25 +157,35 @@ cloop2: dex ; 2
vblank_start:
; 4550 cycles - 3 = 4547
; Try X=13 Y=64 cycles=4545 R2
;===========================
; alternate between tree and snow/music
; every other frame
;===========================
; nop
lda #1 ; 2
eor FRAME ; 3
sta FRAME ; 3
beq tree_half ; 3
;====
; 11
; ldy #64 ; 2
;dloop1: ldx #13 ; 2
;dloop2: dex ; 2
; bne dloop2 ; 2nt/3
; dey ; 2
; bne dloop1 ; 2nt/3
; jmp display_loop
; -1
jmp music_snow ; 3
;=====
; 2
tree_half:
;==========================================================
;==========================================================
; TREE at 30Hz
;==========================================================
;==========================================================
;==========================================================
; erase old lines
;==========================================================
;==========================================================
; clear 10-30 on lines 8-38
; 4+(80+5)*20-1 = 1703 cycles
@ -331,22 +346,21 @@ ll_smc4:
;==============================================================
; 4550 cycles
; -11 alternate frame
;-1703 erase lores
; -13 move tree
; -3 jmp (alignment)
;-2797 draw tree
; -3 jmp at end
;========
; 31
; 20
; Try X=4 Y=1 cycles=27 R4
nop
nop
; Try X=2 Y=1 cycles=17R3
lda COLOR
ldy #1 ; 2
eloop1: ldx #4 ; 2
eloop1: ldx #2 ; 2
eloop2: dex ; 2
bne eloop2 ; 2nt/3
dey ; 2
@ -355,7 +369,31 @@ eloop2: dex ; 2
jmp display_loop ; 3
;=======================================================
;=======================================================
; music/snow
;=======================================================
;=======================================================
music_snow:
; 4550 cycles
; -11 even/odd
; -2 even/odd jump
; -3 jump at end
;======
; 4534
; Try X=29 Y=30 cycles=4531R3
lda COLOR
ldy #30 ; 2
dloop1: ldx #29 ; 2
dloop2: dex ; 2
bne dloop2 ; 2nt/3
dey ; 2
bne dloop1 ; 2nt/3
jmp display_loop ; 3