Re: asm.e questions
On Sun, 24 Oct 1999 10:14:15 -0400, Bernie Ryan <bwryan at PCOM.NET> wrote:
>>Kat wrote
>>Maybe you can call DMA routines if your motherbd supports such things, and
>>call the DMA *before* you need the data, so it's ready when you are.
Maybe?
>
>All motherboards support DMA
What DMA routines have to do with the original subject I can't discern,
other than that they asynchronously access RAM. I still don't see how,
especially under DOS, one can be certain of what has been read and what not
without doing some kind of polling. Since DOS doesn't support event oriented
coding, I can't see how the DOS IO routines, running separately even, can
notify the Eu routines of the status of the IO. The only way to ascertain
whether data is there is with some kind of polling routine. Then there is
the task of determining whether the data is that which was wanted in the
first place... and I just can't really see how that would work.
Everett L.(Rett) Williams
rett at gvtc.com
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Not Categorized, Please Help
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