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Atari coding BBS
| Re: non 50Hz sndh replay question |
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Posted by: ggn
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Jul,02.2014-13:14
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Here's a short piece of code from a Jaguar .mod player that handles correct speeds in both 50 and 60hz (source at http://www.kewlplace.com/play.s):
move.w CONFIG,d0 ;check for 50/60 hz
and.w #VIDTYPE,d0
beq.s .pal_vid
addq.w #1,sound_frame-vars_space(a6) ;update frame count
cmp.w #6,sound_frame-vars_space(a6) ;skip every 6th frame for correct sound speed
bne.s .pal_vid
move.w #0,sound_frame-vars_space(a6) ;and reset frame count
bra .exit
.pal_vid: bsr play_mod ;play the module!!
This is of course for a 60Hz VBL trying to use a piece of code that was made for 50Hz, i.e. skip every 6th frame. So maybe you could do the opposite? Every 5 frames call the music player twice. At least it sounds logical, no idea how this will sound. And of course you'll be wasting twice the cycles there.
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Topic
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Date
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non 50Hz sndh replay question
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mkm/lms
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Jun,27.2014-14:10
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Re: non 50Hz sndh replay question
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Bod/STAX
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Jun,28.2014-08:01
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Re: non 50Hz sndh replay question
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mkm/lms
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Jun,28.2014-11:35
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Re: non 50Hz sndh replay question
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gwEm
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Jun,28.2014-14:14
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Re: non 50Hz sndh replay question
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mkm/lms
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Jun,29.2014-12:46
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Re: non 50Hz sndh replay question
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Bod/STAX
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Jun,29.2014-17:22
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Re: non 50Hz sndh replay question
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mkm/lms
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Jun,29.2014-20:59
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Re: non 50Hz sndh replay question
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evil
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Jun,29.2014-21:37
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Re: non 50Hz sndh replay question
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gwEm
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Jul,02.2014-12:51
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Re: non 50Hz sndh replay question
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ggn
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Jul,02.2014-13:14
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What's the anti-troll code?
That's your personal code to be able to add comments and messages on the dhs.nu site.
Don't have a code or forgot it? Fix it here.
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