> > The RH11 do DMA, just like all other disk controllers I know of.
> 
> IIRC, the RX11/RX211 (Unibus) and RXV11/RXV21 (Qbus) don't do DMA.

The RX11/RXV11 don't do DMA, but the RX211 and RXV21 do, I think

-tony

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