Re: Sound stoppage

On Tue, 27 Mar 2001, Iain Sandoe wrote:

I wish I knew whether it would resume... it's not clear from the
documentation I've got... (the IBM stuff).

It may be implementation dependent.  MACE driver stops tx dma and resumes
afterwards, so tx side of dbdma on MACE must support it.

I have no idea if how AWACS' tx dbdma behaves, but it may be necessary to
make the write to control register multi-step or something, i.e., clear
RUN [in order to clear DEAD bit] and wait until RUN bit is cleared by hw,
then set RUN|WAKE..

If it would, then we could save all this hassle completely...

BTW: I don't *think* it does because one of my testers tried a similar
method to the one you proposed and said it chopped up/repeated sound.

Hmm, I think it has to be either "chopped up" or "repeated" not both..  As
far as dbdma is concerned, those two are quite different effects.


Takashi Oe


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