Thread: NetBSD/Amiga
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Old 25 October 2012, 09:45   #63
NetBSD developer
Join Date: May 2012
Location: Warsaw, Poland
Posts: 410
Originally Posted by Rotzloeffel View Post
IHMO you should set it! I have no idea because it only tells the controller to use chip-Ram 24-bit DMA or other Ram
Amiga IDE controllers don't use DMA at all, that's why this value doesn't make any sense for them .

and as far as I read, there is no known device wich needs chip or 24-bit instead of any Ram.
I can imagine you could have Zorro II DMA SCSI controller with badly written driver that would try to do DMA to Fast outside 24-bit area. Then you would use the mask value to prevent it from accessing this Fast RAM...
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