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Atari coding BBS
| Re: Ste and Falcon DMA sound |
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Posted by: evil
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May,28.2010-09:05
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The DMA-Soundsystem expects you to write the high-byte of the Start- and Endaddress first. Even though this serves no purpose at all, writing the highbyte clears the others. Hence it must be written first.
Is this true ?
Yep it's true. It's the shifter which handle the DMA sound, and a wild guess is that it handle the DMA sound address equal to the video address setting. Not useful for anything in DMA sound, but useful for ST compatibility for video address setting.
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Anders Eriksson
ae@dhs.nu
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