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Atari demoscene BBS
| Re: YM2149 |
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Posted by: Paranoid
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Jun,02.2024-13:50
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I think evl quoted the basic skeleton of sample code above, even though it's a bit cryptic. The sample routines i know decouple any sort of frequency generator from any channel (which will lead to a permanent high on each channel internally) and then modulate the output amplitude by setting each channel's volume register as defined by the sample. Per channel, the volume is limited to 4 Bits but by using more channels, the precision can be extended to 8 Bits.
But this into a timer interrupt service routine occuring 5000 per second and your sample plays at 5KHz.
Because the YM needs to accept and process the data to a certain degree, i think its 2MHz clock limits the replay rate achievable, no matter how fast your CPU is.
The Paranoid / Paradox
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Topic
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Posted by
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Date
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YM2149
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AdamK
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May,31.2024-21:18
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Re: YM2149
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evil
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Jun,01.2024-19:31
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Re: YM2149
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Cyprian
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Jun,01.2024-23:09
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Re: YM2149
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evil
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Jun,02.2024-10:57
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Re: YM2149
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Paranoid
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Jun,02.2024-11:13
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Re: YM2149
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AdamK
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Jun,02.2024-11:36
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Re: YM2149
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Cyprian
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Jun,02.2024-13:11
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Re: YM2149
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Paranoid
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Jun,02.2024-13:50
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Re: YM2149
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evil
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Jun,02.2024-16:50
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Re: YM2149
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Cyprian
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Jun,02.2024-18:13
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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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