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Aucbvax.2718 fa.unix-wizards utzoo!decvax!ucbvax!unix-wizards Tue Aug 18 02:10:13 1981 ramtek graphics unit >From mminnich.EE@UDel Mon Aug 17 22:39:45 1981

does anyone have a ramtek graphics display unit? i am especially interested with experiences people may have had with these devices on the VAX Unibus. currently we are in the process of trying to get our ramtek up on the VAX, but with no luck. our problem appears to be that the unibus interface is not performing DMA transfers correctly.

we are running Berkeley unix; for those of you familiar with the internals of it, every DMA transfer by the ramtek causes UBA invalid map register failures. i am certain my driver is setting things up correctly, so this leads me to believe the interface has some sort of timing problem in which it is putting bad addresses on the unibus.

does anyone have this device up and running on a VAX unibus?

our unit is the ramtek 9050 model; any information on any models will be appreciated.

thanks, Mike Minnich

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