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Article View: comp.sys.ibm.pc.hardware.misc
Article #13

Re: Help! I cannot use DMA with my Buslogic BT 445s VLB

#13
From: Robert Kuchta
Date: Tue, 26 Sep 1995 21:48
38 lines
1730 bytes
In <449o9o$d57@peng.ping.at> tanzbaer@ping.at (Alexander Tuschel)
writes: 
>
>Hi!
>
>I have a Buslogic BT 445s VLB SCSI Hostadapter and have a DMA problem:
>The ASPI-drivers says that *no* DMA channel is used by rhe
>SCSI-Adapter altough I have removed all my extra-cards (like Network
>or SoundBlaster), so there should be enough free DMA channels.
>Please help!
>
>Thank you,
>Alex
>
>-----------------------------------------------
>Dancebear says:"Keep on dancing - cha-cha-cha!"
>e-mail: tanzbaer@ping.at
>-----------------------------------------------
>

Alex

I'm a software developer and a BusLogic OEM. I hear this question at
least once a week on all BT cards.

The BT445 is a busmaster card. For all BT Busmaster boards, NO DMA
really means Busmastering or "I will use DMA when I need to and the DMA
controller and I will decide what DMA channel to use at any point in
time." The NO DMA reported is NO DMA CHANNEL PERMANENTLY SELECTED !! 
 
ASPI reports only the board setup and I believe the 445S does not even
have a setting for the DMA channel. 

And don't feel bad, the description of this is not in the 445s manual
and the text in the 445c manual has me calling the psychic hotline for
interpretation.

Bob
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From: tgvarcs@ix.netcom.com (Robert Kuchta )
Newsgroups: comp.sys.ibm.pc.hardware.misc,comp.sys.ibm.hardware.storage,comp.periphs.scsi
Subject: Re: Help! I cannot use DMA with my Buslogic BT 445s VLB
Date: 26 Sep 1995 21:48:12 GMT
Organization: Netcom
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