Mail Archives: djgpp/1998/11/16/18:35:15
From: | jjed AT hotmail DOT com
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Newsgroups: | comp.os.msdos.djgpp
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Subject: | Virtual DMA services
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Date: | Mon, 16 Nov 1998 22:51:33 GMT
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Organization: | Deja News - The Leader in Internet Discussion
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Lines: | 16
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Message-ID: | <72qa9l$ak0$1@nnrp1.dejanews.com>
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X-Article-Creation-Date: | Mon Nov 16 22:51:33 1998 GMT
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To: | djgpp AT delorie DOT com
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DJ-Gateway: | from newsgroup comp.os.msdos.djgpp
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Reply-To: | djgpp AT delorie DOT com
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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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