UDO repondait a RICHARD pour DMA?...

UH> Hello Richard!
UH> 
UH>  UH>> Where can I find info on how to use the DMA chips of my PC (with
UH>  UH>> e.g. VP)? Please help!
UH>  RD>     Try the file RMVIEW to look all your devices or others if sherings
UH> in
UH>  RD> an OS prompt.
UH> 
UH> OK, but how can I safely let the chips write to a buffer,
UH> somewhere below the 16 meg mark? How do I get a buffer below the 16
UH> meg mark? When I set up the DMA chips to write to a buffer, how does
UH> this work when another task is being serviced? Is the memory
UH> protection a problem? What other caveats are to be taken care of?
UH> (this is OS/2, not MS-DOS)
UH> 
    I Udo!
    Geez, it's look like you want to make some programming's devices and I don'
 know a thing about that.
    I really hope, somebody else will read these statements and will be willing
to answer to your request.
    I think the trick is to make a virtual device like Ray Gwinn's maked for is
SIO, for the communications ports and when you've got another device who try to
establish another task like a sound card, so you'll will have some sound flicke
ing or you'll have a minor crash. 
    So, it's like the old dos but for how to built that safely, I can't give yo
 any hint; sorry...

Bye, Richard
Equipe OS/2 - Team OS/2
Fidonet: 1:255/20
Francomedia: 101:171/0
Internet: Richard.Drapeau{at}CompuBBS.Com

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