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megamusic: stable language card code

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This commit is contained in:
Vince Weaver 2018-10-28 00:40:07 -04:00
parent 236736decd
commit d69c3a24c1
2 changed files with 29 additions and 19 deletions
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15
megamusic/falling_apple.s
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@ -150,20 +150,17 @@ page1_loop: ; delay 115+(7 loop)+4 (bit)+4(extra)
; -1 (+1-2) from above
; -25 inc framecount
; -7 see if timeout
;-1031 play_music
;-1038 play_music
; -10 keypress
;================
; 3476
; 3469
jsr play_music ; 6+1025
jsr play_music ; 6+1032
; Try X=9 Y=68 cycles=3469
; Try X=29 Y=23 cycles=3474 R2
nop
ldy #23 ; 2
faloop1:ldx #29 ; 2
ldy #68 ; 2
faloop1:ldx #9 ; 2
faloop2:dex ; 2
bne faloop2 ; 2nt/3
dey ; 2

33
megamusic/music_1000.s
View File

@ -75,22 +75,35 @@ MB_FRAME = $94
MB_PATTERN = $95
; takes
; 4 +
; 3 + 79 +
; 80 + 82 + 88 +
; 80 + 82 + 88 +
; 80 + 82 + 88 +
; 80 + 80 +
; 25 = 1025
; 7 load pattern
; 11 lang card setup
; 76 smc
; 3 loop init
; 910 play music 80 + 82 + 88 + 80 + 82 + 88 + 80 + 82 + 88 + 80 + 80
; 25 end
;==========
; = 1032
play_music:
; turn on language card
lda $C088 ; 4
; self-modify the code
lda MB_PATTERN ; 3
and #$1f ; 2
tay ; 2
; if > 16 use $D000 PAGE2 of language card
cpy #16 ; 2
bcs use_page2 ; 3
use_page1:
; turn on language card ; -1
lda $C088 ; 4
jmp done_lang_card ; 3
use_page2:
lda $C080 ; 4
nop ; 2
done_lang_card:
lda mal_pattern,Y ; 4
sta mb_smc1+2 ; 4
lda mah_pattern,Y ; 4
@ -115,7 +128,7 @@ play_music:
lda mnh_pattern,Y ; 4
sta mb_smc11+2 ; 4
;=======
; 79
; 76