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pt3: optimize load_sample and load_ornament

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This commit is contained in:
Peter Ferrie 2019-06-01 23:46:00 -04:00 committed by Vince Weaver
parent 6d672ed094
commit c8cbed652c
1 changed files with 8 additions and 12 deletions
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20
pt3_player/pt3_lib.s
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@ -52,8 +52,8 @@ NOTE_SAMPLE_POSITION =26
NOTE_ENVELOPE_SLIDING =27
NOTE_NOISE_SLIDING =28
NOTE_AMPLITUDE_SLIDING =29
NOTE_ONOFF_DELAY =30
NOTE_OFFON_DELAY =31
NOTE_ONOFF_DELAY =30 ;ordering of DELAYs is hard-coded now
NOTE_OFFON_DELAY =31 ;ordering of DELAYs is hard-coded now
NOTE_TONE_SLIDE_STEP_L =32
NOTE_TONE_SLIDE_STEP_H =33
NOTE_TONE_SLIDE_DELAY =34
@ -278,16 +278,14 @@ load_ornament:
; (pt3->data[0xaa+(i*2)]<<8)|pt3->data[0xa9+(i*2)];
asl ; A*2 ; 2
adc #PT3_ORNAMENT_LOC_L ; 2
tay ; 2
; a->ornament_pointer=pt3->ornament_patterns[a->ornament];
lda PT3_LOC,Y ; 4+
lda PT3_LOC+PT3_ORNAMENT_LOC_L,Y ; 4+
sta ORNAMENT_L ; 3
iny ; 2
lda PT3_LOC,Y ; 4+
lda PT3_LOC+PT3_ORNAMENT_LOC_L+1,Y ; 4+
; we're assuming PT3 is loaded to a page boundary
@ -324,7 +322,7 @@ load_ornament:
rts ; 6
;============
; 87
; 83
;===========================
; Load Sample
@ -351,17 +349,15 @@ load_sample:
; (pt3->data[0x6a+(i*2)]<<8)|pt3->data[0x69+(i*2)];
asl ; A*2 ; 2
adc #PT3_SAMPLE_LOC_L ; 2
tay ; 2
; Set the initial sample pointer
; a->sample_pointer=pt3->sample_patterns[a->sample];
lda PT3_LOC,Y ; 4+
lda PT3_LOC+PT3_SAMPLE_LOC_L,Y ; 4+
sta SAMPLE_L ; 3
iny ; 2
lda PT3_LOC,Y ; 4+
lda PT3_LOC+PT3_SAMPLE_LOC_L+1,Y ; 4+
; assume pt3 file is at page boundary
adc #>PT3_LOC ; 2
@ -394,7 +390,7 @@ load_sample:
rts ; 6
;============
; 80
; 76
;====================================
; pt3_init_song