Simultaneous DMA

John Watson usenet at carssdf.UUCP
Tue Apr 9 08:37:06 AEST 1991


In article <2247 at pdxgate.UUCP>, brians at eecs.cs.pdx.edu (Brian Smith) writes:
> The manual for Interactive Unix states that it is possible for some DMA chips
> to malfunction when more than one allocated DMA channel is used simultaneously.
> My motherboard is the AMI Voyager 486-25.
> 
Check your DMA Chip.  If it is an 82C206 multifunction peripherial controller,
try a different vendor if you have that problem.  I have had good success
with the Chips & Technology Branded version.  I had spooky intermittent
problems with a "second source" version (I tried 3 from that mfgr). The
C&T chip worked the first time, using 486-25,AMI Bios, Tiwan Board.

John Watson



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