From: jjed AT hotmail DOT com
Newsgroups: comp.os.msdos.djgpp
Subject: Physical address of linear memory (again)
Date: Mon, 16 Nov 1998 22:45:58 GMT
Organization: Deja News - The Leader in Internet Discussion
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

This is a recurring question...maybe there's no solution?

I need to program a PCI card with physical address of >1MB blocks in memory
(one for DMA and another 2 for card usage).

So far the solutions I've seen for similar problems is to use the dos memory
under 1MB or the VDMA services. I need however a DMA block bigger than 128K
(actually some 2MB). Page boundary is not a problem, the PCI card can access
any address. I also need the other two buffers to be locked all the time as
the card will access them to read control data.

My question is: Is there a solution to this problem, or shall I allocate some
memory for INT15 and then use it "as is"?

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