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pt3: fix issue with freq sliding

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This commit is contained in:
Vince Weaver 2019-05-14 01:02:41 -04:00
parent 325074678a
commit e475e43218
1 changed files with 12 additions and 21 deletions
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33
pt3_player/pt3_lib.s
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@ -533,7 +533,6 @@ note_not_negative:
note_not_too_high:
; w = GetNoteFreq(j,pt3->frequency_table);
jsr GetNoteFreq
@ -601,16 +600,14 @@ check1:
eor #$80
sc_loser1:
bmi slide_to_note ; then A (signed) < NUM (signed) and BMI will branch
beq slide_to_note
; lda note_a+NOTE_TONE_SLIDING_H,X ; compare high bytes
; cmp note_a+NOTE_TONE_DELTA_H,X
; bcc slide_to_note ; if NUM1H < NUM2H then NUM1 < NUM2
; bne check2 ; if NUM1H <> NUM2H then NUM1 > NUM2 (so NUM1 >= NUM2)
; lda note_a+NOTE_TONE_SLIDING_L,X ; compare low bytes
; cmp note_a+NOTE_TONE_DELTA_L,X
; bcc slide_to_note
; beq slide_to_note
; equals case
lda note_a+NOTE_TONE_SLIDING_L,X
cmp note_a+NOTE_TONE_DELTA_L,X
bne check2
lda note_a+NOTE_TONE_SLIDING_H,X
cmp note_a+NOTE_TONE_DELTA_H,X
beq slide_to_note
check2:
lda note_a+NOTE_TONE_SLIDE_STEP_H,X
@ -628,18 +625,10 @@ check2:
sc_loser2:
bmi no_tone_sliding ; then A (signed) < NUM (signed) and BMI will branch
; lda note_a+NOTE_TONE_SLIDING_H,X ; compare high bytes
; cmp note_a+NOTE_TONE_DELTA_H,X
; bcc no_tone_sliding ; if NUM1H < NUM2H then NUM1 < NUM2
; bne slide_to_note ; if NUM1H <> NUM2H then NUM1 > NUM2 (so NUM1 >= NUM2)
; lda note_a+NOTE_TONE_SLIDING_L,X ; compare low bytes
; cmp note_a+NOTE_TONE_DELTA_L,X
; bcc no_tone_sliding ; if NUM1L < NUM2L then NUM1 < NUM2
slide_to_note:
; a->note = a->slide_to_note;
lda note_a+NOTE_SLIDE_TO_NOTE,X
sta note_a+NOTE_NOTE,X ; a->note = a->slide_to_note;
sta note_a+NOTE_NOTE,X
lda #0
sta note_a+NOTE_TONE_SLIDE_COUNT,X
sta note_a+NOTE_TONE_SLIDING_L,X
@ -1380,7 +1369,6 @@ effect_2_small: ; FIXME: make smaller
sta note_a+NOTE_TONE_SLIDE_STEP_L,X
lda (PATTERN_L),Y ; load byte, set as slide_step high
iny
sta note_a+NOTE_TONE_SLIDE_STEP_H,X
; 16-bit absolute value
@ -1399,6 +1387,9 @@ effect_2_small: ; FIXME: make smaller
slide_step_positive:
iny ; moved here as it messed with flags
; a->tone_delta=GetNoteFreq(a->note,pt3)-
; GetNoteFreq(prev_note,pt3);