From: jjed AT hotmail DOT com
Newsgroups: comp.os.msdos.djgpp
Subject: Virtual DMA services
Date: Mon, 16 Nov 1998 22:51:33 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

I have a silly question regarding Virtual DMA and DJGPP

Lock/Unlock DMA buffer (INT 4B, function 8103H and 8104H) take a pointer to a
DDS structure in ES:DI.

Shall I put _dpmi_my_ds() in ES and DDS linear offset in EDI and then call
_dpmi_int (as I would expect in 32 bit protected mode)?

I ask this because VDMAS returns with no error but the DDS is not updated
(that means pointer was wrong).

Thank you for help.
James

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