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Path: sserve!newshost.anu.edu.au!harbinger.cc.monash.edu.au!yarrina.connect.com.au!classic.iinet.com.au!news.uoknor.edu!news.ecn.uoknor.edu!paladin.american.edu!gatech!howland.reston.ans.net!EU.net!nova.puug.pt!news.rccn.net!news.ist.utl.pt!ci.ist.utl.pt!l41388 From: l41388@ci.ist.utl.pt (Luis Filipe Silva Almeida) Newsgroups: comp.os.386bsd.bugs Subject: DMA BUG !!!!!!!! Date: 5 May 1995 18:57:29 GMT Organization: Instituto Superior Tecnico Lines: 18 Message-ID: <3odsep$27b@alfa.ist.utl.pt> NNTP-Posting-Host: ci.ist.utl.pt Summary: DMA BUG !!!!!!!! X-Newsreader: TIN [version 1.2 PL2] Hi! I'm trying to make a transfer mem to mem by DMA but i receive an error message from EMM386 - 'DMA invalid Command' or something like that when i step thru the instructions : mov al,1 out 8,al which is the dma command port, in documentation i possess, it says that activating bit 0 on port 8 will cause a start transfer mem to mem on the dma reading from channel 0 and writing to channel 1. I would appreciate any useful information about this subject. my email : l41388@alfa.ist.utl.pt My alias : Satan My Name : Luis Almeida