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D-Bug & Automation Forum >> Coding >> (M)ST(E) Double VBL (TwinSync) Bug and Solution
http://d-bug.mooo.com/dbugforums/cgi-bin/yabb2/YaBB.pl?num=1233561593 Message started by CJ on 02.02.09 at 07:59:52 |
Title: Re: Remo's speed issue Post by CJ on 04.02.09 at 07:23:29
OK try this one... If the music is twice as fast, your machine is generating 2 VBLs each frame for some reason.
[code] pea supercode(pc) move.w #$26,-(a7) trap #14 lea 6(a7),a7 clr.l -(a7) trap #1 supercode moveq #0,d0 bsr music move.l $70.w,-(a7) move.l #vbl,$70.w loop bsr music+8 bsr music+8 move.w vbl_tick,d0 .hold cmp.w vbl_tick,d0 beq.s .hold cmp.b #$39,$fffffc02.w bne.s loop move.l (a7)+,$70.w move.l #$8080000,$ffff8800.w move.l #$9090000,$ffff8800.w move.l #$a0a0000,$ffff8800.w rts vbl movem.l d0-a6,-(a7) add.w #1,vbl_tick movem.l (a7)+,d0-a6 rte vbl_tick dc.w 0 music incbin "jetset.max" even[/code] http://d-bug.mooo.com/dbugforums/cgi-bin/yabb2/YaBB.pl?action=downloadfile;file=VBLTEST3.PRG ( 8 KB | Downloads )
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