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R. Belmont
Cuckoo for IGAvania
Reged: 09/21/03
Posts: 9716
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Re: MegaPlay Programming
02/16/16 08:50 PM


> I'd suggest you optimize your code better, even a complex sound driver shouldn't be
> eating too much time up on a 68k.

IIRC the YM2612 "sample playback" is just a dumb DAC that you have to poke at the sample rate, so that would be why the sound driver takes a lot of CPU. On C2 you could offload the samples to the uPD7759 (which plays samples by DMA from the ROM, so no CPU intervention) and gain a lot of CPU time back. That's likely why they tacked on the 7759 in the first place.

Edited by R. Belmont (02/16/16 08:53 PM)







Entire thread
Subject Posted by Posted on
* MegaPlay Programming CrazyMonkey 02/05/16 05:49 PM
. * Re: MegaPlay Programming R. Belmont  02/11/16 06:00 PM
. * Re: MegaPlay Programming Haze  02/11/16 07:54 PM
. * Re: MegaPlay Programming CrazyMonkey  02/15/16 01:48 PM
. * Re: MegaPlay Programming Haze  02/15/16 07:11 PM
. * Re: MegaPlay Programming R. Belmont  02/16/16 08:50 PM
. * Re: MegaPlay Programming CrazyMonkey  02/16/16 10:53 PM
. * Re: MegaPlay Programming MooglyGuy  02/17/16 02:12 AM
. * Re: MegaPlay Programming CrazyMonkey  02/17/16 04:39 AM
. * Re: MegaPlay Programming MooglyGuy  02/17/16 10:45 PM
. * Re: MegaPlay Programming CrazyMonkey  02/18/16 02:36 AM
. * Re: MegaPlay Programming R. Belmont  02/18/16 08:32 PM
. * Re: MegaPlay Programming Haze  02/05/16 06:21 PM
. * Re: MegaPlay Programming CrazyMonkey  02/05/16 06:29 PM
. * Re: MegaPlay Programming Haze  02/05/16 06:35 PM

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