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Atari demoscene BBS
| Re: YM2149 |
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Posted by: evil
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Jun,01.2024-19:31
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I think it's more an issue with the chipset/bus limiting the speed if you put a faster CPU in the ST.
Then what is a sample? If we limit it to 4-bit (well, actually 15 volume levels), it could boil down to a stream of these:
move.l d0,(a7)
move.l d1,(a7)
......
move.l a6,(a7)
d0-d7/a0-a6 are preloaded with YM-reg and volume. So each sample is converted to that format before starting.
I forgot if there is a penalty writing to the YM, if not, that's 12 cycles per sample, generating over 667 kHz on a normal 8 MHz machine.
--
Anders Eriksson
ae@dhs.nu
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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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