[hatari-devel] MP2 question

Miro Kropáček miro.kropacek at gmail.com
Fri Jan 21 13:23:24 CET 2011


>
> Actually, it doesn't work because transfers between DMA and DSP (crossbar)
> are using a non documented function.
> (A melt between handshake and non-handshake mode at the same time).
>
I don't think it's undocumented feature, it's just how things work. I
remember while implementing my ADPCM decoder in DSP studying MP2 code too
and with combination of DSP UM it did make perfect sense. Too bad my memory
is so broken... but it was something like (really take it only as literate
example) loading 16-bit value into 24-bit register but 0's weren't padded
from left side but from the right.

-- 
MiKRO / Mystic Bytes
http://mikro.atari.org
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