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| subject: | DMA? |
Hello Richard!
UH>> OK, but how can I safely let the chips write to a buffer,
UH>> somewhere below the 16 meg mark? How do I get a buffer below the 16
UH>> meg mark? When I set up the DMA chips to write to a buffer, how does
UH>> this work when another task is being serviced? Is the memory
UH>> protection a problem? What other caveats are to be taken care of?
UH>> (this is OS/2, not MS-DOS)
RD> I think the trick is to make a virtual device like Ray Gwinn's maked
RD> for is SIO, for the communications ports
Yup! Just allocate a buffer of a multiple of 64K (256?) and just give the
devicedriver instructions what to do: pump data out or in at XX Khz.
When the program knows the 0:32 address of the buffer everything should be OK.
I do have source for MS-DOS but I'd like to be able to do all this in Warp.
Who can help me?
Greetz,
Udo
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