Christopher G. Mason wrote:
On 3/1/2011 8:53 AM, Greg Buchner wrote:If I recall the discussions of the time correctly, I think that it didn't make it to market because of power issues. And with ads planned several months in advance, they probably thought they could get it out in time, but didn't. Greg B.Wasn't one of the problems related to DMA access? I remember reading something about the chip solution not being able to do DMA since it didn't have access to the signals present at the slots.
Most caching cards don't support DMA, but their speeds are high enough doing programmed data transfers that it doesn't matter for disk accesses. Of course, if you want to run a coprocessor card that needs DMA, that won't work. -michael NadaNet 3.1 for Apple II parallel computing! Home page: http://home.comcast.net/~mjmahon/ "The wastebasket is our most important design tool--and it's seriously underused."